Thuja Research Articles

The Method of Electroplating Wastewater Treatment and the Comparison of Adsorption Materials

In this study, the chemical method was used to treat electroplating wastewater by chemical method and biological method, and the hydrogen-catalytic oxidation method was used for pretreatment of cyanide wastewater. For the selection of adsorbent materials containing lead wastewater pretreatment, the method of using a single factor experiment exploits the amount of investment, initial concentration, adsorption time on the adsorption amount and the adsorption rate, and the results showed that when the dosage was 0.5 g·L-1, the adsorption rate of platycladus orientalis bark to Pb2+ was 88.41%,which was the highest compared with other adsorption materials; when the initial concentration is large, the lateral cerridge maintains a high adsorption amount and reaches 51.39 mg·g-1. This value is significantly higher than other materials that have been reported, such as constituents, walnuts, etc. The adsorption time reaches the adsorption balance after 30 min. The platycladus orientalis bark exhibits the best adsorption in the end.

Early Identification of Fungal Leaf Blight Disease (Alternaria Alternate) on Platycladus Orientalis Plants by Using Gas Chromatography-Ion Mobility Spectrometry

Early Identification of Fungal Leaf Blight Disease (Alternaria Alternate) on Platycladus Orientalis Plants by Using Gas Chromatography-Ion Mobility Spectrometry

Reproductive development and quality of seeds of the oriental arborvitae in the Crimea

Reproductive development and quality of seeds of the oriental arborvitae in the Crimea

Nventory model for the management of urban trees using a geographic information system

The urban trees of the Chapultepec Country neighborhood in Guadalajara, Jalisco were studied in order to elaborate a forestmanagement model and through a Geographic Information System. The neighbourhood has a total amount of 32 blocks, 1 raisedmedian, 1 roundabout, 1 park, 1 traffic easement, with a surfae area of 49.95 hectares. A full census of the wooded area wasconducted and supported by thematic mapping, data gathering of enviromental and forestry variables, using a GPS Garmin eTrex 10every tree was georeferenced. Outstandig results; there are 1386 trees, from 81 different species that belong to 31 botanical families.The more prolific are Ficus benjamina, Thuja orientalis, Arecastrum romanzoffianum, Citrus aurantium y Cupressus sempervirens.The present condition of the regsstered trees revealed that 33.91% are healthy, 57.07% are in regular condition, 7.36% are in poorcondition and 1.66% are standing dead. On the basis of the elaborated database, the wooded area census thah includes forestryvariables, pruning necessities, phytosanitary condition of the trees and thematic cartography of the wooded areas status, a forestrymanagement program was developed specially for the urban trees of the neighbourhood that can be executed weekly or monthly bythe Park and Gardens brigades. A ratio of 9.16 mgreen area surface per citizen was found, this constitutes the minimum standardrecommended by the World Health Organization (WHO). There is a relationship of 3.03 trees per habitant, a much bigger amountthan the WHO’s standard, which points out that in order to obtain a better air quality in urban areas there must be a tree for everythree citizens.

Isolation of industrially valuable α-Cedrol from essential oil of Platycladus orientalis (Thuja orientalis) leaves using linear gradient counter current chromatography

α-Cedrol, a monoterpene alcohol, is an industrially valuable compound used in different productions due to its diverse pharmacological and therapeutic effects. This paper reports the isolation of this compound from essential oil of Platycladus orientalis (Thuja orientalis) leaves using high performance countercurrent chromatography (HPCCC) for the first time. Two different methodologies were developed with hexane-ethyl acetate-methanol-water (HEMWat) solvent systems used in reversed phase linear gradient elution mode. In the first method, the gradient from HEMWat 17 (1/1/1/1) to 27 (19/1/19/1) solvent systems allowed isolation of 29.8 mg of high purity α-cedrol crystals with 86.6% recovery from 50 mg/mL sample solution as well as isolation of other components. In the 2nd method gradient from HEMWat 23 (4/1/4/1) and 27 (19/1/19/1) solvent systems of narrower polarity range resulted in doubling sample concentration to 100 mg/mL. Also the 2nd method reduced the elution time of α-cedrol to just 70 min with comparatively higher amount (65.72 mg) and percent recovery (94.58%) as compared to previous run.

Formulation and evaluation of herbal ointment using leaves of Thuja orientalis l. Leaf extract

The study of diseases and their treatment are important part of our ancient time worldwide. The knowledge of medicinal plants must have been accumulated in the course of many centuries. Herbal plants are huge sources of neutraceuticals, prevent the different disease or maintain healthy life. Plant produces primary metabolites for their basic survival and secondary metabolites for their ecological, taxonomical and biochemical differentiation and diversity. Herbal medicine prepare different part of plant are used. Herbal drug is design as the alternative formulation for the external use in the form of ointment. For the clinical use the herbal ointment apply externally on human body. The main aims of this research are preparation of herbal ointment from the Thuja orientalis L.Plants used as antibacterial activity. Under this research work, it is design as herbal ointment with the help of Ethanolic extract of Thuja orientalis L. and determines the anti bacterial capacity on it. In vitro study the antibacterial activity of the Ethanolic extracts of dried leaves of Thuja orientalis L. are determine by using the Agar cup plate method versus different bacteria such as Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa etc. By blending the Ethanolic extract of Thuja orientalis L.(10 % w/w) into aqueous cream we formulated herbal ointment. The emulsifying agent and simple ointment bases are added in above herbal ointment for increase the antibacterial effectiveness during in vitro evaluation. Thuja orientalis L. (Family Cupressaceae) are broadly used in traditional system of medicine throughout different part of India, China, Russia, Korea, Japan, India, Florida and Iran. It is used in the treatment of diarrhea, cough, cold, bronchitis, and upper part repertory infection. The current study deals with the determination of formulation and evaluation of herbal ointment using Thuja orientalis leave extract.

Green route to a novel and ecofriendly phytosynthesis of silver nanoparticles using Platycladus orientalis L. leaf extract

The present investigation validated the synthesis and characterization of AgNPs using the leaf extracts of Platycladus orientalis (L.). The synthesized AgNPs were characterized by UV–visible and Fourier Transform Infrared (FT-IR) spectroscopy, X ray diffractometer (XRD), Scanning Electron Microscopy (SEM) with Energy Dispersive X Ray (EDX) spectroscopy and the average size of nanoparticle was measured to be 8 nm. The synthesized AgNPs exhibited effective antimicrobial activity against the selected bacterial and fungal isolates.

Genetic Evaluation of Ancient Platycladus orientalis L. (Cupressaceae) in the Middle Reaches of the Yellow River Using Nuclear Microsatellite Markers

As a precious and rare genetic resource, ancient Platycladus orientalis L. (Cupressaceae) has important scientific, cultural and historical value. The ancient temples and royal cemeteries in the middle reaches of the Yellow River contain the most concentrated and abundant distributions of ancient P. orientalis. Due to unfavorable conditions, the genetic resources of ancient trees are facing great threats and challenges; thus, it is urgent to strengthen the evaluation of the genetic resources of ancient P. orientalis. In this study, we used nine polymorphic nuclear simple sequence repeats (nSSRs) to evaluate the genetic resources of 221 individuals in 19 ancient P. orientalis populations in the middle reaches of the Yellow River. These selected polymorphic nSSR loci can be used reliably and rapidly in P. orientalis genetic studies. Our study showed that the 19 ancient P. orientalis populations have high genetic diversity (mean H = 0.562, He = 0.377). High historical gene flow (mean Nm = 1.179) and high genetic differentiation (mean Fst = 0.184) were observed in the ancient P. orientalis population. The analysis of molecular variance (AMOVA) showed that higher genetic variation existed within populations (93%) rather than among populations (7%). The genetic structures showed that the 19 populations were divided into two groups. The Mantel test and neighbor-joining (NJ) tree analysis showed no geographical distribution characteristics among populations, which may indicate a history of transplanting by ancient humans. Our research provides a theoretical basis for the protection and utilization of ancient P. orientalis germplasm resources and exploration of the historical origin and genetic relationships among the populations of P. orientalis on a large scale in the future.

Partitioning tree water usage into storage and transpiration in a mixed forest

BackgroundWater migration and use are important processes in trees. However, it is possible to overestimate transpiration by equating the water absorbed through the plant roots to that diffused back to the atmosphere through stomatal transpiration. Therefore, it is necessary to quantify the water transpired and stored in plants.MethodThe δ2H/δ18O technique and heat ratio method were used to explore the water usage of coniferous and broad-leaved tree species, including the proportions of water used for transpiration and water storage.ResultsPlatycladus orientalis and Quercus variabilis had strong plasticity in their water usage from different sources. Platycladus orientalis primarily used groundwater (30.5%) and the 60–100-cm soil layer (21.6%) throughout the experimental period and was sensitive to precipitation, absorbing water from the 0–20-cm layer (26.6%) during the rainy season. Quercus variabilis absorbed water from all sources (15.7%–36.5%) except from the 40–60-cm soil layer during the dry season. In addition, it did not change its water source but increased its groundwater uptake during the rainy season. The annual mean water fluxes of P. orientalis and Q. variabilis were 374.69 and 469.50 mm·year− 1, with 93.49% and 93.91% of the water used for transpiration, respectively. However, nocturnal sap flow in P. orientalis and Q. variabilis was mainly used for water storage in the trunk rather than transpiration, which effectively alleviated drought stress and facilitated the transport of nutrients.ConclusionsThe water stored in both species comprised 6%–7% of the total water fluxes and, therefore, should be considered in water balance models.

Quantitative accuracy assessment of the revised sparse Gash model using distinct time-step climatic parameters

Abstract Rainfall interception (I) can considerably influence the transport process of water. The revised sparse Gash model (RSGM) is a tool for determining the I, which assumes that the two climate parameters in the model are equal for all storms. However, few studies have provided additional cases to reexamine the correctness of this assumption and investigated the response of I of single storms to the time-step variability in climatic parameters. Hence, rainfall partitioning was measured during the growing season in 2017 for Pinus tabuliformis, Platycladus orientalis, and Acer truncatum in Northern China, and we ran RSGM on an event basis using different time-step climatic parameters (storm-based, monthly, and fixed) to estimate I. In summary, the modeling accuracy of both cumulative I and individual I was enhanced by increasing the time step of the climatic parameters in this study. These positively support the assumption in the RSGM. These results suggest that it is more appropriate to run the RSGM using fixed climate parameters to estimate I for these tree species during the growing season in northern China. Additionally, the assumption in the RSGM should be appealed to be further confirmed across the widest possible range of species, regions, and time scales.

Variation in Platycladus orientalis (Cupressaceae) Reproductive Output and Its Effect on Seed Orchard Crops’ Genetic Diversity

The genetic efficiency of seed orchards is crucial for determining seed crops’ genetic gain and diversity. Platycladus orientalis is a conifer tree of important ecological value in China. Here, we assessed the reproductive output (fertility) variation for 166 clones in a first-generation P. orientalis seed orchard over five years and across three years for each gender (female: 2017, 2018, and 2020 and male: 2017, 2019, and 2021). Fertility variation and genetic diversity parameters were estimated for each gender-year combination. The reproductive output (fertility) variation differed among years, provinces, clones nested within provinces, and ramets within clones. We observed asymmetry in the gender reproductive output and parental imbalance and determined their profound effects on the genetic diversity of these seed crops. The maleness index revealed the existence of female-biased or male-biased clones. When seeds from multiple individuals and years were blended, we found an increase in the effective number of parents (Np) and in genetic diversity (GD), and a reduced fertility variation (Ψ) in the seed orchard. When we set the effective number of parents (Np) to 30, the GD of the seed orchard could be maintained at more than 95%. Thus, achieving genetic diversity balance in seed production can be accomplished through monitoring the fertility variation of orchards and through the utilization of the thereby generated information for the advanced generation of seed orchards.

Effects of land-use types on the temporal dynamics of soil active carbon and nitrogen in the rocky mountainous of North China

ABSTRACT To evaluate the effects of land-use types on the temporal dynamics of soil active carbon (C) and nitrogen (N), a field experiment was conducted from five adjacent sites, farmland (FL), abandoned land (AL), Platycladus orientalis artificial forest (PO), Robinia pseudoacacia artificial forest (RP) and Quercus variabilis artificial forest (QV) in the rocky mountainous of North China. Soil dissolved organic C and N (DOC, DON), soil microbial biomass C and N (MBC, MBN), ammonium-N (NH4 +-N) and nitrate-N (NO3 −-N) were determined during four seasons. The results showed that soil DOC, DON, MBC, MBN, NH4 +-N, and NO3 −-N contents in PO were higher than other land-use types, especially in QV. Soil DOC, DON, MBC, and MBN contents all showed a higher value in March. Both soil DOC/DON and MBC/MBN showed peak values in June. With the increase of soil depth, soil DOC, DON, MBC, and MBN contents all tended to decrease. Most of soil active C and N components had significant correlations with SOC, TN, AP, soil particle volume fraction and the activities of BG and PROT, while the main influencing factors for soil active C and N components were various. The key contributing factors to soil DOC and MBC was SOC, accounting for 62.6% and 67.9%, respectively. Soil TN was the main affecting factor of soil DON (98.4%) and MBN (75.7%). Soil NH4 +-N and NO3 −-N were, respectively, affected by volume fraction of silt particles (10.3%) and AP (15.0%). In conclusion, soil active C and N components are more likely to accumulate in the PO soil in spring, indicating tree species and temperature are the key factors driving soil active C and N turnover in this area.

Particle Retention Capacity, Efficiency, and Mechanism of Selected Plant Species: Implications for Urban Planting for Improving Urban Air Quality.

Atmospheric particulate matter (PM) has been of concern owing to its negative effects on human health and its role in environmental degradation. For mitigation purposes, it is important to select the most efficient plant species in urban greening. Here, a fast, cost-saving methodology was first added to the conventional method to investigate the size-resolved PM retention capacity and efficiency of twenty plant species. Surface PM (SPM), which can be removed by water and brushing, accounted for 44.9–66.9% of total PM, in which the water-soluble PM (DPM) accounted for 12.9–22.1% of total PM. A large mass proportion of in-wax PM (14.1–31.7%) was also observed. Platycladus orientalis, Eriobotrya japonica, Viburnum odoratissimum, Magnolia grandiflora had the highest AEleaf (retention efficiency on per unit leaf area) to retain SPM within different diameter classes (DPM, PM0.1–2.5, PM2.5–10, PM>10). AEplant (retention efficiency of individual tree) varied greatly among different plant species, mainly due to the dependence on the total area of a tree. AEland (retention efficiency on per unit green area) is a suitable index for PM retention ability and efficiency. In general, P. orientalis, V. odoratissimum, Pittosporum tobira, Photinia serrulate, M. grandiflora, E. japonica were the efficient species in retaining PM at different scales (i.e., leaf, individual tree, green area). The species like Trifolium repens, Phyllostachys viridis, were the least efficient plant species. The investigated species are all evergreen species, which will remove PM throughout the whole year, even in winter. So, we recommended that the plant species with the highest PM retention efficiency can be used in urban greening. Meanwhile, horticulture practices should also be considered to improve the leaf area index to improve their PM retention and air purification abilities.

Growth Suppression of a Gingivitis and Skin Pathogen Cutibacterium (Propionibacterium) acnes by Medicinal Plant Extracts.

Propionibacterium acnes, newly reclassified as Cutibacterium acnes, is an anaerobic Gram-positive bacterium causing acne, found mainly on the skin. In addition, P. acnes is responsible for inflammation of the gums (gingivitis) and blood vessels, consequently leading to various diseases in the human body. In recent years, the evolution of microorganisms, such as P. acnes, that have become resistant to many commercial antibiotics due to the widespread use of antimicrobial drugs in the treatment of infectious diseases has emerged as a major clinical problem. We here analyzed the potential use of 37 medicinal plant extracts as plausible candidates for treating P. acnes, in terms of total phenolic and flavonoid contents, antioxidants scavenging and antimicrobial activity. Consequently, methanol extracts from 14 medicinal plants showed promising antimicrobial activities against P. acnes. In particular, as the extracts from Chrysosplenium flagelliferum F. and Thuja orientalis L. exhibited distinct antimicrobial activities in both the broth dilution and disc diffusion assay, they could be effectively used as active ingredients for preventing or treating inflammatory periodontal diseases, such as periodontitis.

An alcoholic extract of Thuja orientalis L. leaves inhibits autophagy by specifically targeting pro-autophagy PIK3C3/VPS34 complex

Autophagy is a lysosome-dependent degradation program to maintain cellular homeostasis in response to a variety of stressful conditions, such as long-lived or non-functional subcellular organelles, protein aggregates, nutrient limitation, and virus/bacteria infection. Accordingly, dysregulation of autophagy is closely associated with many human pathophysiological conditions, such as neurodegenerative diseases, aging, and cancer, and autophagy is highlighted as an important therapeutic target for these human diseases. In autophagy process, PIK3C3/VPS34 complex plays important roles in autophagosome biogenesis. Accumulating evidences that inhibition of PIK3C3/VPS34 complex successfully blocks autophagy make the complex as an attractive target for the development of autophagy-specific inhibitors. However, considering that various forms of PIK3C3/VPS34 complex exist and they are involved in many different cellular functions, the targeting of the pro-autophagy PIK3C3/VPS34 complex is required to specifically inhibit autophagy. To identify autophagy inhibitors targeting the pro-autophagy complex, we have performed the screening of a customized natural product library consisting of 35 herbal extracts which are widely used in the oriental medicine as anti-inflammation and/or anti-tumor reagents. We discovered that an alcoholic extract of Thuja orientalis L. leaves inhibits pro-autophagy complex formation by disrupting the interaction between autophagy-specific factor, ATG14L, and the complex core unit Vps34-Beclin 1 in vitro. Also, it inhibits the nutrient starvation induced autophagy and diminished pro-autophagy PIK3C3/VPS34 complex containing either ATG14L or UVRAG in several cell lines. Our results strongly suggest that Thuja orientalis L. leave extract functions as an autophagy-specific inhibitor not decreasing the complex activity nor the protein level, but preventing protein–protein interaction between autophagy-specific factor (ATG14L and UVRAG) and PIK3C3/VPS34 complex core unit, Vps34-Beclin 1, thereby specifically depleting the pro-autophagy complex to inhibit autophagy.

Characteristics of tree growth and leaf damage under different O3 concentrations

Pinus bungeana, Platycladus orientalis, Koelreuteria paniculata and Ginkgo biloba were taken to research. 3 open-top chambers with O3 concentration gradient were set up to study the characteristics of tree growth and leaf damage under different O3 concentrations. The results showed that with the increase of O3 concentration, the growth of different tree species were inhibited, but the diameter between different tree species was not significantly different. The plant height of different tree species the plant height of different tree species increased from 0.05m to 0.06m under NF O3 concentration, from 0.01m to 0.03m under NF40 O3 concentration, but from 0.01m to 0.02m under NF80 O3 concentration. The diameter of different tree species at 50cm increased from 0.90cm to 1.40cm under NF O3 concentration, from 0.70cm to 1.00cm under NF40 O3 concentration, and from 0.60cm to 0.80cm under NF80 O3 concentration. Under NF O3 concentration, the leaves of different tree species performed well, without any damage symptoms. With the increase of O3 concentration, leaves were withered and died. Leaves wilted under NF40 O3 concentration, but died and fallen under NF80 O3 concentration. Pinus bungeana and Platycladus orientalis were good at resisting O3 pollution, while Koelreuteria paniculata and Ginkgo biloba were worse. The damage of O3 concentration to plants is more sensitive to broad-leaved trees.

Preliminary Phytochemical Analysis and Biological Evaluation of Some Medicinal Chinese Plant Extracts against Tribolium castaneum

Application of botanical pesticides is a new trend in pest control nowadays as an environmentally safe alternative measures for synthetic chemicals. Hence, this study was aimed to analyze the phytochemical constituents of four medicinal Chinese plants, namely Lonicera maackii, Platycladus orientalis, Viburnum opulus, and Crataegus pinnatifida, and to investigate the insecticidal potentialities of leaves extracts of these plants against Tribolium castaneum. The research was carried out under laboratory conditions, at the Institute of Resources and Environmental Engineering, Shanxi University, China. Ethyl acetate, methanol and water extracts of the plant leaves were tested at different concentrations (5, 2.5, and 1.25% w/v). Yields of extracting materials, mortality and repellent effects were the important parameters evaluated. The phytochemical screening showed the presence of alkaloids, saponins, tannins, flavonoid, and terpenoids in C. pinnatifida, but the other plants contain some of these compounds. The highest ethyl acetate extract concentration (5%) of V. opulus and C. pinnatifida obtained the best mortality means (5.00±0.41 and 4.75±0.25a, respectively), compared to the other treatments, but without significant differences from the middle concentration (2.5%) of both extracts. In repellency test, L. maackii methanol achieved the highest repellency percentage (91.38%). The findings proved that ethyl acetate extract of V. opulus and C. pinnatifida are the best insecticidal treatment, whereas methanol extract of L. maackii is the best repellent effect, against T. castaneum. These three plants require additional studies to be assessed as a component in pest management of store pests.

Nontargeted Metabolomics as a Screening Tool for Estimating Bioactive Metabolites in the Extracts of 50 Indigenous Korean Plants.

Many indigenous Korean plants have been used in medicinal preparations and health-promoting foods. These plant species contain beneficial metabolites with various bioactivities, such as antioxidant and anti-inflammatory activities. Herein, we suggest a new screening strategy using metabolomics to explore the bioactive compounds in 50 Korean plants. Secondary metabolites were analyzed using UHPLC-LTQ-Orbitrap-MS/MS. The plant extracts were subjected to antioxidant and anti-inflammatory assays. We identified metabolites that contributed to bioactivities according to the results of bioassays and multivariate analyses. Using Pearson’s correlation, phenolics (e.g., casuarictin, 3-O-methylellagic acid) showed positive correlation with antioxidant activity, while biflavonoids (e.g., amentoflavone, rosbustaflavone) were correlated with nitric oxide (NO) inhibition activity. To compensate for the limitation of this new strategy, we further validated these by investigating three parts (branches, fruits, leaves) of Platycladus orientalis which showed high activities on both bioassays. Unlike the above observation, we identified significantly different metabolites from different parts, which was not the results of bioassays. In these validation steps, interestingly, biflavonoids (e.g., robustaflavone, sciadopitysin) contributed to both activities in P. orientalis. The findings of this work suggest that new strategy could be more beneficial in the identification of bioactive plant species as well as that of their corresponding bioactive compounds that impart the bioactivity.

Effects of Tree Species and Soil Enzyme Activities on Soil Nutrients in Dryland Plantations

Long-term afforestation strongly changes the soil’s physicochemical and biological properties. However, the underlying mechanism of different tree species driving change in soil nutrients is still unclear in the long-term dryland plantations of the Loess Plateau, China. In this study, samples of surface soil (0–20 cm) and woody litter were collected from five plantations (≥50 years) of Caragana korshinskii, Armeniaca sibirica, Populus hopeiensis, Platycladus orientalis, and Pinus tabulaeformis and a natural grassland, and tested for the carbon, nitrogen, phosphorus, and potassium contents, as well as the soil sucrase (SC), urease (UE), and alkaline phosphorus (ALP) activities. We found that soil nutrients, enzyme activities, and the litter’s chemical properties obviously varied among five tree species. C. korshinskii significantly increased the soil’s TC, organic carbon (OC), total nitrogen (TN), available nitrogen (AN), and available potassium (AK) by 28.42%, 56.08%, 57.41%, 107.25%, and 10.29%, respectively, and also increased the soil’s available phosphorus (AP) by 18.56%; while P. orientalis significantly decreased soil TN (38.89%), TP (30.58%), AP (76.39%), TK (8.25%), and AK (8.33%), and also decreased soil OC (18.01%) and AN (1.09%), compared with those in grassland. The C. korshinskii plantation had higher quality litter and soil enzyme activities than the P. orientalis plantation. Moreover, 62.2% of the total variation in soil nutrients was explained by the litter’s chemical properties and soil enzyme activities, and the litter phosphorus (LP) and soil ALP had a more significant and positive impact on soil nutrients. Therefore, tree species, LP, and soil ALP were key factors driving soil nutrient succession in dryland plantations. The significantly positive nitrogen–phosphorus coupling relationship in the “litter–enzyme–soil” system revealed that the improving nitrogen level promoted the phosphorus cycle of the plantation ecosystem. Our results suggest that leguminous tree species are more suitable for dryland afforestation through the regulation of litter quality and soil enzyme activities.

Characteristics and chemical reactivity of biogenic volatile organic compounds from dominant forest species in the Jing-Jin-Ji area, China

BackgroundBiogenic volatile organic compounds (BVOCs) play an essential role in tropospheric atmospheric chemical reactions. There are few studies conducted on BVOCs emission of dominant forest species in the Jing-Jin-Ji area of China. Based on the field survey, forest resources data and the measured standard emission factors, the Guenther model developed in 1993 (G93) was applied in this paper to estimate the emission of BVOCs from several dominant forest species (Platycladus orientalis, Quercus variabilis, Betula platyphylla, Populus tomentosa, Pinus tabuliformis, Robinia pseudoacacia, Ulmus pumila, Salix babylonica and Larix gmelinii) in the Jing-Jin-Ji area in 2017. Then the spatiotemporal emission characteristics and atmospheric chemical reactivity of these species were extensively evaluated.ResultsThe results showed that the total annual BVOCs emission was estimated to be 70.8 Gg C·year− 1, consisting 40.5 % (28.7 Gg C·year− 1) of isoprene, 36.0 % (25.5 Gg C·year− 1) of monoterpenes and 23.4 % (16.6 Gg C·year− 1) of other VOCs. The emissions from Platycladus orientalis, Quercus variabilis, Populus tomentosa and Pinus tabulaeformis contributed 56.1 %, 41.2 %, 36.0 % and 31.1 %, respectively. The total BVOCs emission from the Jing-Jin-Ji area accounted for 61.9 % and 1.8 % in summer and winter, respectively. Up to 28.8 % of emission was detected from Chengde followed by Beijing with 24.9 %, that mainly distributed in the Taihang Mountains and the Yanshan Mountains. Additionally, the Robinia pseudoacacia, Populus tomentosa, Quercus variabilis, and Pinus tabulaeformis contributed mainly to BVOCs reaction activity.ConclusionsThe BVOCs emission peaked in summer (June, July, and August) and bottomed out in winter (December, January, and February). Chengde contributed the most, followed by Beijing. Platycladus orientalis, Quercus variabilis, Populus tomentosa, Pinus tabulaeformis and Robinia pseudoacacia represent the primary contributors to BVOCs emission and atmospheric reactivity, hence the planting of these species should be reduced.