Pseudoacacia Community Research Articles

Soil Nutrient Distribution and Preferential Flow Transport Patterns in Robinia Pseudoacacia Communities of Degraded Wetlands

The Yellow River Delta wetlands in the Yellow River Delta National Nature Reserve are facing serious degradation due to water scarcity and soil salinization. This study aims to investigate the mechanism of wetland degradation by analyzing the small-scale distribution of soil nutrients and preferential flow transport patterns in the Robinia Pseudoacacia community, which is a typical vegetation community in degraded wetlands. Soil physical and chemical properties based on field staining experiments were analyzed, and indoor solute penetration experiments were conducted to investigate the distribution of soil nutrients and hydrological characteristics. The results showed that the contents of soil organic carbon, organic matter, total nitrogen, and available phosphorus decreased with increasing soil depth, with higher contents in the preferential flow area than in the matrix flow area. Soil organic carbon, organic matter, total nitrogen, total phosphorus, and available phosphorus showed positive correlations with each other, while soil pH and conductivity exhibited negative correlations with the above nutrients. The efflux rate of the Acacia community exhibited a gradual decline as soil depth increased, and the relative concentration of the solution exhibited a non-monotonic pattern of decrease, increase, and subsequent decrease with increasing soil depth. The findings could provide valuable guidance for the restoration and management of degraded wetlands in the Yellow River Delta.

Construction and application of a new index for quantifying root erosion resistance: Root framework erosion resistance index

The matching of root system is a key factor driving the resistance of plant community to soil erosion. In this study, Amoeba graphical method was used to establish a root framework erosion resistance index (ERIrf, %) from three dimensions of root morphology, quantity and spatial concerns to quantify the effective of root erosion resistance by plant community. We analyzed root growth characteristics of plant community from abandoned land, Caragana korshinskii and Robinia pseudoacacia communities in loess hilly area. The results showed that the parameters of constructing the root framework erosion resistance index included the acting coefficient of root framework (α), root density (Rb, kg·m-3), root framework degree (S), soil bulk density (ρ, g·cm-3), and soil and water conservation coefficient (φ). The equation could be expressed as ERIrf=α×Rd×S×φρ×100%. This root framework erosion resistance index well represented the erosion resistance effects of plant root system. Logarithmic function could better fit the relationship between soil erosion resis-tance ability and root framework erosion resistance index. Our findings would provide scientific reference for the construction of anti-erosion vegetation community and assessment of ecological construction.

Syntaxonomy of the Robinia pseudoacacia communities in the central peri-adriatic sector of the Italian peninsula

This study presents the results of a floristic vegetational study on Robinia pseudoacacia neoformation forests in the peri-Adriatic sector of central Italy. This has allowed the characterization of these coenoses at the ecological, biogeographic, syntaxonomic and landscape levels. These currently represent the southernmost syntaxa of the Robinietea class described for the Italian peninsula, and the first syntaxonomic contribution of this class in Europe for the Mediterranean biogeographical region. We propose here the new alliance Lauro nobilis–Robinion pseudoacaciae of the order Chelidonio–Robinietalia pseudoacaciae and class Robinietea, with two new associations: Melisso altissimae–Robinietum pseudoacaciae and Rubio peregrinae–Robinietum pseudoacaciae. The new alliance Lauro nobilis–Robinion pseudoacaciae (typus: Melisso altissimae–Robinietum pseudoacaciae) brings together neoformation forests and pre-forest dominated by R. pseudoacacia in those territories with a Mediterranean macroclimate of the peri-Adriatic sector of central Italy. The optimum is found for the alluvial plain and low-slope morphologies, on soils that are moist and rich in organic matter and in areas with anthropic disturbance. On the basis of comparisons with the European context, the alliance Bryonio–Robinion described for the temperate territories of northern Italy is here validated.

Variations in soil infiltration capacity after vegetation restoration in the hilly and gully regions of the Loess Plateau, China

To control the severe soil and water losses on the Loess Plateau, China, a series of vegetation restoration projects were conducted. A better understanding of the effect of vegetation types on the soil infiltration capacity is important for the sustainable development of vegetation restoration. The aim of this study was to establish a soil infiltration capacity index (SIC) and to analyze the mechanism influencing variations in the soil infiltration capacity after vegetation restoration on the Loess Plateau. Eight vegetation types (community dominated by Artemisia scoparia, Stipa bungeana, Artemisia gmelinii + S. bungeana, A. gmelinii + Stipa grandis, A. gmelinii + Artemisia giraldii, Sophora viciifolia, Caragana korshinskii, and Robinia pseudoacacia) and bare land as the control were selected for this study. The SIC was established by a steady infiltration rate (SR, 50–60 min) and stage I average infiltration rate (ARSI, 0–5 min) according to principal component analysis (PCA). Path analysis was used to investigate how the soil properties and plant fine root affected the soil infiltration capacity. The SIC values of the eight vegetation types were all higher than that of the bare land. The R. pseudoacacia community had the highest SIC value (0.43), followed by the A. scoparia community (0.30) while the bare land (− 0.56) had the lowest value. Path analysis showed that the increase in the fractal dimension and non-capillary porosity of soil particles enhanced the SIC directly. Increases in the clay content increased the SIC by affecting the fractal dimension of soil particles, while increases in the fine root density reduced the SIC by affecting the non-capillary porosity. Plant functional groups (grasses and legumes) affected SIC indirectly via non-capillary porosity and plant root. A comprehensive index, the SIC, was established to describe the soil infiltration capacity by the PCA method. Based on a comparison with bare land, vegetation restoration enhanced the soil infiltration capacity. The R. pseudoacacia community was the most effective at improving the soil infiltration capacity. The improvement in infiltration was closely related to direct increases in the soil non-capillary porosity and soil particle fractal dimension.

Effects of alien species Robinia pseudoacacia on plant community functional structure in hilly-gully region of Loess Plateau, China.

To investigate the effects of the introduction of Robinia pseudoacacia on the functional structure of plant communities, we selected paired-plots of R. pseudoacacia communities and native plant communities across different vegetation zones, i.e., steppe zone, forest-steppe zone, forest zone in hilly-gully region of Loess Plateau, China. We measured several functional characteristics and then compared the functional structures of R. pseudoacacia and native plant communities in different vegetation zones. The results showed that the variation of the functional traits across different vegetation zones were consistent in R. pseudoacacia community and native plant community, including leaf carbon concentration, leaf nitrogen concentration, leaf phosphorus concentration, specific leaf area, and leaf tissue density. The leaf carbon concentration, leaf nitrogen concentration, and specific leaf area of the R. pseudoacacia community were significantly higher than those of the native plant community. The trend of change that the functional diversity indices, i.e., FRic, FEve, FDiv, FDis, Rao of the R. pseudoacacia community and the native plant community with vegetation zones were different. The introduction of R. pseudoacacia enhanced the plant community functional diversity in the forest zone but reduced community functional diversity in the steppe zone.

Species, functional, structural diversity of typical plant communities and their responses to environmental factors in Miao Archipelago, China.

Island vegetation plays an important role in biodiversity research across the world. The study of plant diversity in island is helpful for understanding the mechanism of plant diversity maintenance under land-sea interaction. Here, four typical plant communities (Quercus acutissima community, Robinia pseudoacacia community, Pinus thunbergii community and Vitex negundo community) in Miao Archipelago were selected to examine the species, functional and structural diversities and their responses to environmental factors at the community scale by using species diversity indices, functional diversity indices, as well as structural diversity indices. The results showed that the species richness and Rao index of P. thunbergii community was higher than that of Q. acutissima community and R. pseudoacacia community, but the structural diversity was lower. The species diversity and structural diversity of V. Negundo shrub were lower than that of forest community, but the functional diversity was higher than some forest communities. The relationship between the diversity of typical plant communities in island area illustrated a significant positive correlation between species richness with Rao index and tree height diversity, however the correlation with functional evenness was significantly negative. The structural diversity and functional evenness were determined by slope with negative and positive relationships, respectively. Functional heterogeneity, functional divergence and species diversity were affected largely by soil physical and chemical properties, displaying the positive relationship with soil bulk density and soil total carbon content, and a negative relationship with soil water content. In conclusion, diversity pattern of plant community in Miao Archipelago reflected not only the characteristics in mainland vegetation but also the special nature of the sea island.

Plant stoichiometry characteristics and relationships with soil nutrients in Robinia pseudoacacia communities of different planting ages

Ecological stoichiometry is the study of mass balance of multiple chemical elements in ecosystems; it analyzes the constraints and consequences of these mass balances during ecological processes, based on universal laws of physics, chemistry, and biology. To understand the variation in stoichiometry characteristics of Robinia pseudoacacia of different planting ages, and determine the main soil factors influencing stoichiometry characteristics of R. pseudoacacia, relationships between leaf and branch stoichiometry and soil nutrient characteristics in R. pseudoacacia communities of different planting ages were analyzed in this study. Results showed that: (1) with increasing planting age, the C, N, P contents in leaves and branches, as well as the N/P ratio in leaves increased initially and then decreased, with the highest value in 40a (40years old). The C/N and C/P ratios in leaves and in branches decreased initially and then increased with the increase of planting age. The N, P contents, and C/N and C/P ratios in leaves had nonlinear relationships with R. pseudoacacia age. The average N, P contents, and C/N, C/P ratios in leaves were affected significantly by planting age (P>0.05). (2) With increasing planting age, soil C, N, P contents, and C/P, N/P ratios in R. pseudoacacia communities increased initially and then decreased. (3) Soil total N content was the main factor influencing C and N contents in leaves and C, N, P contents and C/P ratio in branches. The C, P contents and C/N, C/P ratios in leaves and C/N ratio in branches were influenced by the soil N/P ratio. The C content and N/P ratio in leaves were affected by the soil organic C content. In conclusion, with increasing planting age, 12 stoichiometry characteristic indices in R. pseudoacacia communities and soil increased initially and then decreased. Stoichiometry characteristic indices in R. pseudoacacia communities showed the highest value in 40a. Stoichiometry characteristic indices in R. pseudoacacia were mainly affected by soil total N content, the N/P ratio, and organic C content.

Variation in leaf functional traits of different-aged Robinia pseudoacacia communities and relationships with soil nutrients

On the basis of various leaf functional traits of different-aged Robinia pseudoacacia communities, as well as the relationships between the traits and soil nutrients, the adaptation strategy of R. pseudoacacia in relation to soil conditions was analyzed in Ansai County, the Loess Plateau, China. The results showed that specific leaf area, leaf area, leaf water content, leaf total nitrogen content and leaf organic carbon content first increased and then decreased with the increasing stand age. The peak values of specific leaf area (279.18 cm2·g-1), leaf area (12.33 cm2), leaf water content (0.09%), leaf total nitrogen content (33.01 g·kg-1) and leaf organic carbon content (523.08 g·kg-1) were obtained at 30 years old. With the increasing stand age, leaf tissue density, leaf total phosphorus content, leaf thickness and stomata density increased, and stomata length and stomata width decreased. Leaf area, specific leaf area, leaf total phosphorus content, leaf water content, leaf thicknessand stomata density were the main indexes based on principal component analysis (PCA), for R. pseudoacacia leaf functional traits responding to the increased stand age. The indexes were correlated with each other, indicating that R. pseudoacacia was capable of changing leaf morphological structure to adapt to environmental changes. Soil total nitrogen content was the main factor influencing leaf area, leaf water content, specific leaf area and stomata length, while soil organic carbon content mainly affected stomata width, leaf tissue density, leaf thickness, leaf total phosphorus content, leaf total nitrogen content and stomata density. Therefore, soil total nitrogen and organic carbon content were main factors that affected leaf functional traits of R. pseu-doacacia in different stand ages. Soil nutrients in R. pseudoacacia communities were improved with the increasing stand age, which eventually affected leaf functional traits. The flexibility of leaf functional traits indicated that R. pseudoacacia communities had great potential to adapt to environmental change in Loess Plateau hilly region.

黄土丘陵区不同侵蚀环境下土壤有机碳对植被恢复的响应

PDF HTML阅读 XML下载 导出引用 引用提醒 黄土丘陵区不同侵蚀环境下土壤有机碳对植被恢复的响应 DOI: 10.5846/stxb201606161168 作者: 作者单位: 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院水利部水土保持研究所,西北农林科技大学林学院 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目（41371280）；水利部公益性行业科研专项项目（201501045） Response of soil organic carbon to vegetation restoration in different erosion environments in the hilly-gullied region of the Loess Plateau Author: Affiliation: State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A＆F University,,State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A＆F University;Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:植被恢复是提高土壤有机碳累积和储存的重要措施。以黄土丘陵区两个典型侵蚀环境下的小流域即黄土区坊塌流域和砒砂岩区满红沟流域退耕坡面为研究对象，分析了土壤有机碳含量（SOCC）、有机碳密度（SOCD）在同一侵蚀环境不同群落下的变化以及在同一群落不同侵蚀环境间的差异，旨在探明不同侵蚀环境下土壤有机碳对植被恢复的响应。结果表明：1）同一侵蚀环境下，与坡耕地相比，自然恢复方式下退耕地植被恢复初期SOCC、SOCD均显著降低，之后随植被恢复均显著升高（P < 0.05）；人工恢复方式下退耕地20-25年柠条锦鸡儿群落和13-14年刺槐群落SOCC、SOCD均显著升高（P < 0.05），说明同一侵蚀环境内，退耕地在两种恢复方式下均能显著提高土壤有机碳累积和储存。2）同一侵蚀环境下，与相近恢复年限的自然恢复群落相比，刺槐群落SOCC、SOCD均显著高于长芒草+铁杆蒿群落（P < 0.05），砒砂岩区柠条锦鸡儿群落SOCC、SOCD均显著低于铁杆蒿群落（P < 0.05），黄土区柠条锦鸡儿群落SOCC显著低于而SOCD显著高于铁杆蒿群落（P < 0.05），说明相同恢复时间内，相对于自然恢复方式，人工刺槐造林在两种侵蚀环境下均能累积与储存较多的土壤有机碳，而柠条锦鸡儿造林在两种侵蚀环境下累积土壤有机碳的效果均不佳，在黄土区储存土壤有机碳效果好于砒砂岩区。3）同一群落下，黄土区人工和自然恢复群落SOCC均高于砒砂岩区；黄土区人工恢复群落SOCD均显著高于而自然恢复群落SOCD均低于砒砂岩区（P < 0.05），说明黄土区人工恢复累积和储存土壤有机碳及自然恢复累积土壤有机碳的效果较好，而砒砂岩区自然恢复储存土壤有机碳的效果较好。 Abstract:Vegetation restoration is one of the most important measures to improve accumulation and storage of soil organic carbon (SOC). The objective of our study was to understand the response of soil organic carbon to vegetation restoration in different erosion environments in the hilly-gullied region of the Loess Plateau. The study was thus conducted on 42 restored slopes and six sloping croplands (control) in the Fangta watershed and the Manhonggou watershed, which are located, respectively, in the Loess area and Sandstone area and is characterized by different erosion environments. Variations in soil organic carbon content (SOCC) and soil organic carbon density (SOCD) among different plant communities in each erosion environment and among different erosion environments for each plant community were analyzed. In each erosion environment, compared with sloping croplands, SOCC and SOCD decreased significantly at the preliminary stage of natural restoration while the increased significantly with the process of restoration (P < 0.05); and significant increases of SOCC and SOCD were also observed for Caragana korshinskii communities (20-25 a) and Robinia pseudoacacia communities (13-14 a). This shows that soil organic carbon could be improved using both natural and artificial means of restoration within each erosion environment. SOCC and SOCD of R. pseudoacacia communities were much higher than those of Stipa bungeana +Artemisia gmelinii communities (15 a) within each erosion environment (P < 0.05); SOCC and SOCD in C. korshinskii communities (20-25 a) were much lower than in A. gmelinii communities (30 a) in the Sandstone area (P < 0.05); and C. korshinskii communities (20-25 a) had much lower SOCC and much higher SOCD than A. gmelinii communities (30 a) in Loess area (P < 0.05). These results indicate that within the same duration of restoration, compared with natural restoration, R. pseudoacacia afforestation could accumulate and store more SOC within each erosion environment. The effectiveness of C. korshinskii afforestation for accumulating SOC was not superior within all erosion environments, however, its effectiveness in storing SOC was superior in the Loess area but not in the Sandstone area. Both artificial and natural communities had higher SOCC in the Loess area than in Sandstone area, and artificial and natural communities had higher SOCD and lower SOCD in the Loess area than in the Sandstone area, respectively. Therefore, in contrast to the Sandstone area, artificial restoration in the Loess area was more effective at accumulating and storing SOC, and natural restoration was superior in accumulating SOC, but not in storing SOC. 参考文献 相似文献 引证文献

Effects of Revegetation on Soil Organic Carbon Storage and Erosion-Induced Carbon Loss under Extreme Rainstorms in the Hill and Gully Region of the Loess Plateau.

Background: The Loess Plateau, an ecologically vulnerable region, has long been suffering from serious soil erosion. Revegetation has been implemented to control soil erosion and improve ecosystems in the Loess Plateau region through a series of ecological recovery programs. However, the increasing atmospheric CO2 as a result of human intervention is affecting the climate by global warming, resulting in the greater frequency and intensity of extreme weather events, such as storms that may weaken the effectiveness of revegetation and cause severe soil erosion. Most research to date has evaluated the effectiveness of revegetation on soil properties and soil erosion of different land use or vegetation types. Here, we study the effect of revegetation on soil organic carbon (SOC) storage and erosion-induced carbon loss related to different plant communities, particularly under extreme rainstorm events. Materials and methods: The erosion-pin method was used to quantify soil erosion, and soil samples were taken at soil depths of 0–5 cm, 5–10 cm and 10–20 cm to determine the SOC content for 13 typical hillside revegetation communities in the year of 2013, which had the highest rainfall with broad range, long duration and high intensity since 1945, in the Yanhe watershed. Results and discussion: The SOC concentrations of all plant communities increased with soil depth when compared with slope cropland, and significant increases (p < 0.05) were observed for most shrub and forest communities, particularly for natural ones. Taking the natural secondary forest community as reference (i.e., soil loss and SOC loss were both 1.0), the relative soil loss and SOC loss of the other 12 plant communities in 2013 ranged from 1.5 to 9.4 and 0.30 to 1.73, respectively. Natural shrub and forest communities showed greater resistance to rainstorm erosion than grassland communities. The natural grassland communities with lower SOC content produced lower SOC loss even with higher soil loss, natural secondary forest communities produced higher SOC loss, primarily because of their higher SOC content, and the artificial R. pseudoacacia community with greater soil loss produced higher SOC loss. Conclusions: These results indicate that natural revegetation is more effective in enhancing SOC storage and reducing soil erosion than artificial vegetative recovery on hillsides. However, natural secondary forest communities, with higher SOC content and storage capacity, may also contribute to larger SOC loss under extreme rainstorms.

인왕산의 식생

The forest vegetation of Mt. Inwang was surveyed from August to October 2014. The vegetation of Mt. Inwang classified into 12 main communities according to the phisiognomic dominant species: P. densiflora commintity, P. densiflora-Prunus sargentii commintity, P. densiflora-Quercus mongolica commintity, P. densiflora-R. pseudoacacia commintity, Q. acutissima commintity, Q. acutissima- P. densiflora commintity, Q. acutissima-R. pseudoacacia commintity, Quercus variabilis commintity, Robinia pseudoacacia commintity, R. pseudoacacia-Pinus. densiflora commintity, R. pseudoacacia- Quercus acutissima commintity, R. pseudoacacia-Quercus serrata commintity. In addition, we identified the P. densiflora commintity distributed around the mountain top rocky ridge area, and R. pseudoacacia community is bordered on the inhabitant in the foot of mountain. P. densiflora-P. sargentii commintity showed higher species diversity than other communities. The degree of green naturality (DGN) 7 occupied 46.8% and DGN 6 occupied 40.6% of Mt. Inwang area. The coverage of herb layer of plant community was poor of 10%, shrub layer was 30~40%, and tree layer was 80% in all plant communities. However the coverage of sub-tree layer was very thin in pine tree communities. The frequency distribution in DBH-class of P. densiflora in the P. densiflora community showed scarce distribution of small diameter trees, and was opposed to the R. pseudoacacia that had large individuals of small diameter in the R. pseudoacacia community. The net primary productivity (NPP) was assumed as 1,504.42 g/m2/yr(use temp.) by Miami model, and 1,483.99 g/m2/yr by Montreal model, respectively.

Carbon sequestration of mature black locust stands on the Loess Plateau, China

In Northwestern China, the carbon fixing capacity of black locust ( Robinia pseudoacacia ) has been questioned because of its slow growth following the return of unproductive farmland to forest. To explore the effects of stand age on the carbon sequestration potential of R. pseudoacacia in a semi-arid, ecologically fragile area, parameters related to carbon fixation were investigated in plots of three stand ages (5, 10, and 25 years). Each plot was divided into four subsystems: R. pseudoacacia , understory vegetation, litter, and soil, and the carbon stored capacity of each subsystem was estimated. The organic carbon density of R. pseudoacacia , understory vegetation, and litter ranged from 3.4-16.8% and increased gradually with increasing stand age. Soil organic carbon increased with increasing stand age and accounted for 83.2-96.6% of the total carbon stored. Soil CaCO 3 content also increased with increasing soil depth and stand age. Because total plant and soil carbon storage increased with increasing age of R. pseudoacacia stands, the 25-year-old R. pseudoacacia community had the highest carbon fixation capacity, which was substantial even in this arid region.

Comparison of neophyte communities of Robinia pseudoacacia L. and Acer negundo L. in the eastern Baltic Sea region cities of Riga and Kaunas

In this study, we examined the species composition of neophyte communities of Robinia pseudoacacia and Acer negundo and compared the site conditions of the urban environment of two cities—Riga and Kaunas. Eighty-five plots of A. negundo and R. pseudoacacia communities were selected. Within each plot, all of the vascular plant species were recorded, and their abundance was estimated in 2014. Composite soil samples of the 0–10cm mineral topsoil were collected for the estimation of the soil chemical properties at nine systematically distributed points in each sample plot. The soil pHKCL, exchangeable bases, total nitrogen, total organic matter, C/N ratio, and concentrations of the elements (P, K, Ca, Mg, Fe, Mn, Zn, Cu, Na, Pb, Cd, and Ni) were estimated. Canonical correspondence analysis was used to analyse the vegetation data. An indicator species analysis was carried out. The relationship between the soil chemical parameters was assessed by principal component analysis, and the results showed that structure and composition of the plant communities of A. negundo and R. pseudoacacia differed. The number of species was lower and the herb layer was more developed in R. pseudoacacia communities, whereas the structure of communities differed between Riga and Kaunas. The cover of the shrub layer was more developed in Riga. The number of species in A. negundo communities was similar, whereas the number of species in R. pseudoacacia communities was lower in Kaunas. Alien species were more frequent in Riga. Neophyte communities in Kaunas were more homogenous. The soil in communities in Riga had more carbon, was richer in nutrients and more acidic than in Kaunas. R. pseudoacacia grew in more fertile soils than A. negundo communities. The differences between the neophyte communities in Riga and Kaunas were caused by differing geological parameters, soil development and urbanization effects.

Distribution of Phytolacca americana in a coastal sand dune

This study examined the main factors affecting the distribution of Phytolacca americana, an exotic plant species in Korea, in coastal sand dunes. The areas examined from June 2004 to February 2006 were in Sindusagu where was located on Sindu-ri, Wonbuk-myen, Taean-gun, Chungcheongnam-do. The vegetation, sediment properties, sizes and ages of Robinia pseudoacacia, P. americana and Pinus thnunbergii and spatial distribution of P. americana were assessed. Firstly, correlation coefficients (CC) between P. americana's root biomass and sediment properties were not significant. Secondly, of the four community types, P. americana was not in the mixed herbaceous community and its density was the highest in the P. thunbergii-R. pseudoacacia and R. pseudoacacia community The Poisson distribution analysis revealed the distribution of P. americana to be severely clumped. The root biomass of P. americana and the basal area of R. pseudoacacia were significantly correlated, but the CCs between P. thunbergii and other two species were not significant. The ages of P. americana and R. pseudoacacia in a quadrat were significantly correlated. Thirdly, P. americana's ages in a quadrat were mostly similar to each other. Therefore, the spatial distribution of P. americana was largely influenced by R. pseudoacacia but not by the sediment properties, and plants in a narrow area were concurrently germinated.

衡阳紫色土丘陵坡地植被恢复阶段土壤特性的演变

PDF HTML阅读 XML下载 导出引用 引用提醒 衡阳紫色土丘陵坡地植被恢复阶段土壤特性的演变 DOI: 10.5846/stxb201301030012 作者: 作者单位: 湖南环境生物职业技术学院,湖南农业大学生物科学技术学院,湖南环境生物职业技术学院,湖南环境生物职业技术学院,湖南环境生物职业技术学院,湖南环境生物职业技术学院,湖南环境生物职业技术学院 作者简介: 通讯作者: 中图分类号: S154.2；S155.2 基金项目: 湖南省重点项目（62020608001）；湖南省科技厅项目（S2006N332）；湖南省教育厅科学研究项目（12C1057）；湖南省普通高校优秀青年骨干教师培养对象资助项目；湖南环境生物职业技术学院南岳学者基金项目（湘环职院[2012]4号）资助 Changes of soil properties in re-vegetation stages on sloping-land with purple soils in hengyang of Hunan Province, South-central China Author: Affiliation: Hunan Environmental-Biological Polytechnic College,a College of Landscape Architecture,bCentre of Practice and Train,Hengyang,,,,,, Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:采用空间代替时间序列方法，对衡阳紫色土丘陵坡地不同恢复阶段的土壤理化性质、土壤微生物数量、土壤微生物学性质和主要酶活性特征以及它们之间的相互关系进行研究。结果表明：不同恢复阶段土壤理化特征存在明显差异，从狗尾草群落阶段（Ⅰ）、紫薇-狗尾草群落阶段（Ⅱ）、牡荆+剌槐群落阶段（Ⅲ）到枫香+苦楝-牡荆群落阶段（Ⅳ），0-40cm土壤含水量、容重、非毛管孔隙度、孔隙比、大于0.25mm水稳性团聚体含量、有机碳（SOC）、全氮（TN）、碱解氮（AN）与速效磷（AP）显著增加，土壤容重显著减小，土壤pH值逐渐减小，土壤全磷（TP）、全钾（TK）与速效钾（AK）其差异变化不大，土壤理化特征的差异引起土壤微生物数量、微生物学性质与土壤酶活性的变化；不同恢复阶段土壤微生物总数显著增加，其中细菌数量显著增加，而真菌与放线菌数量显著减少；不同恢复阶段土壤基础呼吸（SBR）、土壤微生物量碳（SMBC）、土壤微生物量氮（SMBN）、土壤微生物量磷（SMBP）、土壤微生物熵（Cmic/Corg）显著增加，而代谢熵或呼吸熵（qCO2）显著减小，碳氮比（C/N）逐渐减小；不同恢复阶段均显著地增加了脲酶（URE）、蔗糖酶（INV）与磷酸酶（APE）的活性；土壤理化性状、土壤微生物数量、土壤微生物学性质与土壤酶活性之间存在密切的相关性。 Abstract:The purpose of the paper was to study the purple soil's physico-chemical characteristics, microbial populations, microbial properties, enzyme activities, and the relationships between them in different stages of re-vegetation on sloping-land in Hengyang of Hunan Province, South-central China. We took soils of 0-40cm depth in typical areas in Setaria viridi community stage (Ⅰ); Lagerstroemia indica-Setaria viridi community stage (Ⅱ); Vitex negundo var. cannabifolia+Robinia pseudoacacia community stage (Ⅲ); and Liquidamdar formosana+Melia azedarach-Vitex negundo var. cannabifolia community stage (Ⅳ) as our test objects by using the space series to replace time courses.The results showed that: (1) From Ⅰ, Ⅱ, Ⅲ to Ⅳ, the soil water content, total soil porosity, ratio of non-capillary porosity to capillary porosity, >0.25mm water stable aggregates content, SOC (Soil Organic C), TN (Total N), AN (Available N) and AP (Available P) increased significantly. In contrast, soil bulk density decreased significantly, pH decreased slightly, and there were no significant differences in TP (Total P), TK (Total K) and AK (Available K). The changes in the number of soil microbes, microbial properties and the soil enzyme activities have resulted from the differences in the soil physico-chemical characteristics. (2) The number of soil microbes increased significantly, with a significant increase in the number of bacteria, but the numbers of fungi and actiomycetes decreased significantly in the process of the succession. (3) The SBR (Soil Base Respiration), SMBC (Soil Microbial Biomass C), SMBN (Soil Microbial Biomass N), SMBP (Soil Microbial Biomass P) and Cmin/Corg increased significantly. The qCO2 decreased significantly, and C/N decreased, with no significant difference in the process of succession. The activities of URE (Urease), INV (Invertase) and APE (Alkaline phosphatase) significantly increased in the process of the succession. (4) There were close correlations among the soil physico-chemical characteristics, the number of soil microbes, the soil microbial properties and the soil enzyme activities. This study will, to some degree, enrich the restoration ecology of this area and provide a theoretical basis for the re-vegetation and reconstruction of ecosystems on sloping land with purple soils in Hengyang of Hunan Province, South-central China. 参考文献 相似文献 引证文献

우면산의 식생 연구

Plant community distribution, community change and species diversity in the Mt. Umyeon and its surrounding area were investigated from July to August 2012. The severe heavy rain caused landslides at several areas in the Mt. Umyeon in July 2011. We studied the effects of landslides on plant communities through comparative analysis with the former study before landslides. Dominant species were not changed significantly before and after 2011, although landslides had a great effect on some parts of Mt. Umyeon. The landslide reduced the number of trees and changed the community structure in some quadrats. On the other hand, it appeared that the succession process is ongoing on the both Quercus spp. and Robinia pseudo-acacia communities which were not affected by landslides into the Quercus mongolica community by the observation of the appearance of Quercus mongolica Fisch. in shrub, sub-tree, and tree layers. It seemed that Pinus koraiensis community would remain for quite a long time because the sub-tree layer has not attained its mature stage in community development.

산국과 감국의 자생지 환경특성과 식생 비교

This study compared the differences between the Dendranthema boreale and Dendranthema indicum in their habitat, soil adaptability, species composition and community structure in Korea. More D. boreale distributed than D. indicum to in the place where high elevation and on the surface of low degree slope. Both D. boreale and D. indicum growed well in south-east direction of the slope. The soil pH of D. boreale and D. indicum was 6.1 and 7.1, respectively. Ca, Mg, Na and organic matter content of the soil of D. boreale habitat was significantly lower than that of the D. indicum habitat. There were 102 and 88 taxa, in D. boreale and D. indicum habitat, respectively. Both species generally distributed along with herbs than along with trees. The important species found in D. boreale habitat were Artemisia princeps (57.1%) and Humulus japonicus (33.3%), and the D. indicum habitat were Miscanthus sinensis (42.9%) and Lonicera japonica (38.1%). The D. boreale group was classified into Artemisia princeps, Crepidiastrum denticulatum, Miscanthus sinensis, Humulus japonicus, Pueraria lobata, Lespedeza bicolor, Lonicera japonica and Rubus crataegifolius community. The D. indicum group was classified into Artemisia capillaris, Peucedanum japonicum, Boehmeria pannosa, Pinus thunbergii, Lonicera japonica, Quercus acutissima and Robinia pseudoacacia community. There is a large difference bewteen D. boreale and D. indicum in their habitat, soil adaptability, species composition and community structure.

봉산 생태·경관보전지역 팥배나무 군락 보전방안

This study was carried out for the purpose of presenting basic data bases for conservation and management measures of Ecological and Scenery Conservation Area in Bongsan. The analysis results of the actual vegetation showed that rate of vegetation cover were composed of 72.3% of Robinia pseudo-acacia Forest, 10.7% of Sorbus alnifoila Forest, and Sorbus alnifoila was founded as a dominant woody plant species in the Core Zone of Bongsan Ecological and Scenery Conservation Area. To investigate the vegetation structure of Sorbus alnifolia Community in Bongsan Ecological and Scenery Conservation Area, twelve <TEX>$100m^2$</TEX> sized plots were set up in Bongsan. According to the classification by TWINSPAN, the communities were divided into the three groups of Sorbus alnifolia Community, Pinus koraiensis Community and Robinia pseudo-acacia Community, To analyze annual diameter growth rate for major tree species, nine sample trees from research plots were measured. Expected ages of Sorbus alnifoila trees were 27~37years, Robinia pseudo-acacia trees were 17~26 years, Pinus koraiensis, Pinus rigida, Prunus sargentii, and Quercus mongolica trees were 27~38 years. As a result, annual diameter growth rates of Robinia pseudo-acacia and Pinus rigida tended to remarkably decreased, Sorbus alnifoila had the wood on inter-specific competition of the woody plant species. Importance values of Sorbus alnifoila in the three layers of Sorbus alnifoila communities were evenly high.

한반도 맥문동속 집단의 자생지 생육환경과 군락구조

This text was analyzed and investigated the vegetation and floristic composition by cluster analysis and classification of phytosociological method, to evaluate the species composition, habitat environment and community structure of Liriope platyphylla and Liriope spicata group in Korea. The southeast slope gradient of the habitat of L. platyphylla and L. spicata was 6.7 to 8.4%, and the habitat altitude of L. platyphylla (41.0 m), L. spicata (114.9 m) was different. Habitat distribution of L. spicata was broader than L. platyphylla. Appearing plants of L. platyphylla and L. spicata group was 58 taxa, 99 taxa, respectively, and Coverage of tree layer was 87.5%, 92.5% respectively. In genus Liriope group, the highest appearing frequency of plant grow in the moist valley as Quercus serrata. Thus, plants of genus Liriope growth was better in moist shade. The vegetation of L. platyphylla group was classified into Quercus serrata community, Castanopsis sieboldii community, Pinus densiflora community and Pinus thunbergii community, and the Liriope spicata group was classified into Quercus serrata community, Quercus alien community, Quercus acutissima community, Prunus verecunda community, Robinia pseudoacacia community, Pinus densiflora community and Pinus thunbergii community. In genus Liriope group, Quercus serrata and Pinus densiflora communities was the closest the similarities.

경기도 평택시 비전동 마을숲의 생태적 특성

A village grove is the one fostered and protected for a district's traditional life near the vicinity of a ruderal village. This research is done to grasp potential natural vegetation, to use a basis data needed for its management and preservation as well as restoration project by examining the vegetation and flora targeting a village grove of the southern district of Gyeonggi-do which has been seriously damaged subsequent to a rapidly progressing city development. According to the survey, there appeared an outgrowth flora of Pteridophyta consisting of 69 families, 136 genera, 20 varieties, 3 forms, 170 species-totalling to 193 taxa. Urbanization index was revealed to 4.55% and naturalization rate 6.74%. In life-cycle pattern, perennials were found to show the highest distribution rate; in infiltration-multiplication strategies, human wave tactics type was found to be the highest 51%, consisting of 98 species, and naturalization rate also was revealed to be 6.74%. The vegetation unit was divided into a total of 11 patterns, such as a community of Pinus densiflora community, Pinus densiflora-Pinus rigida community, Pinus densiflora-Castanea crenata community, Pinus rigida community, Pinus rigida-Castanea crenata community, Pinus rigida-Quercus acutissima community, Castanea crenata community, Castanea crenata-Quercus acutissima community, Quercus acutissima community, Quercus acutissima-Robinia pseudo-acacia community and Robinia pseudo-acacia community. Quercus acutissima community is of a community type dominated by Quercus acutissima, in place of Pinus densiflora community selected by natural succession.