Dry Weight Ratio Research Articles

Influence of Sulphur and Zinc Levels on Growth and Yield of (ZAID) Sunflower (Helianthus annus L.)

Background: The field experiment was carried out during Zaid 2022 at Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P). The soil of experimental plot was sandy loam in texture, nearly neutral in soil reaction (pH 7.1), low in organic carbon (0.36 %), available N (171 kg/ha), available P (15.2 kg/ha) and available K (233 kg/ha). The experiment was laid out in Randomized Block Design with nine treatments each replicated thrice on the basis of one year experimentation. The treatments which are T1: Sulphur 15 kg/ha + Zinc 0.2%, T2: Sulphur 15 kg/ha + Zinc 0.3%, T3: Sulphur 15 kg/ha + Zinc 0.4%, T4: Sulphur 25 kg/ha + Zinc 0.2%, T5: Sulphur 25 kg/ha + Zinc 0.3%, T6: Sulphur 25 kg/ha + Zinc 0.4%, T7: Sulphur 35 kg/ha + Zinc 0.2%, T8: Sulphur 35 kg/ha + Zinc 0.3%, T9: Sulphur 35 kg/ha + Zinc 0.4%, T10: Control are used. The results showed that application of Sulphur 35 kg/ha + Zinc 0.4% recorded significantly higher plant height (111.00 cm), Number of leaves/plant (12.00), Stem Diameter (5.80 cm), Plant dry weight (55.99 g/plant), Seeds/capitulum (216.66), unfilled Seeds/capitulum (35.00), Test weight (62.57 g), Seed yield (1935.60 kg/ha), stalk yield (4942.4 kg/ha), Harvest index (56.07 %), gross returns (Rs.1,16,136.00/ha), net return (Rs.82,486.00/ha) and benefit cost ratio (2.45).

Evaluation of Vegetative Development of Quinoa under Water Stress by Applying Different Organic Amendments

Prolonged drought periods, increasingly occurring worldwide due to global climate change, could affect the growth and productivity of both traditional and climate-resilient crops, including quinoa. Specifically, the vegetative growing cycle of this species is highly sensitive to drought conditions. In this context, using organic amendments could help plants cope with drought due to their ability to enhance soil water status. So, the current study aimed to investigate the effect of different organic amendments, i.e., two biochars (from woodchips and vineyard prunings) and a vermicompost (from cattle manure), applied to the soil alone and mixed at 2% rate (w/w), on the vegetative development of quinoa (cv. Titicaca), during which a period of water stress was imposed from the twelve-leaf stage to the bud stage. A set of growth-related parameters were measured both during and at the end of the experiment, along with a set of water-related parameters, at the end of the water-stress period and after soil re-watering. The results showed that woodchip biochar, both alone and mixed with vermicompost, significantly affected plant growth during the water-stress period, also allowing a quicker recovery once drought conditions ended. Indeed, the leaf number and area, SPAD index, leaf and stem fresh weight, and dry matter content in plants treated with woodchip biochar, alone and mixed with vermicompost, were higher than vineyard pruning biochar, alone and mixed with vermicompost and similar to the well-watered control plants. Similar results were observed considering the yield contributing traits detected at the end of the experiment, including the main panicle length, number of sub-panicle, as well as fresh weight and dry matter content of both panicle and sub-panicles. Additionally, the water-related parameters, especially the low turgid weight to dry weight ratio of woodchip biochar treated plants, showed evidence of better growth than vineyard pruning biochar. At the end of the experiment, the WUE of plants treated with woodchip biochar and vermicompost, both alone and mixed, was higher than vineyard pruning biochar alone and mixed with vermicompost. Among the tested organic amendments, woodchip biochar alone and mixed with vermicompost positively affected the vegetative growth response of quinoa under water-stress conditions.

Low-dose of caffeine alleviates high altitude pulmonary edema via regulating mitochondrial quality control process in AT1 cells.

Backgrounds: High-altitude pulmonary edema (HAPE) is a life-threatening disease without effective drugs. Caffeine is a small molecule compound with antioxidant biological activity used to treat respiratory distress syndrome. However, it is unclear whether caffeine plays a role in alleviating HAPE. Methods: We combined a series of biological experiments and label-free quantitative proteomics analysis to detect the effect of caffeine on treating HAPE and explore its mechanism in vivo and in vitro. Results: Dry and wet weight ratio and HE staining of pulmonary tissues showed that the HAPE model was constructed successfully, and caffeine relieved pulmonary edema. The proteomic results of mice lungs indicated that regulating mitochondria might be the mechanism by which caffeine reduced HAPE. We found that caffeine blocked the reduction of ATP production and oxygen consumption rate, decreased ROS accumulation, and stabilized mitochondrial membrane potential to protect AT1 cells from oxidative stress damage under hypoxia. Caffeine promoted the PINK1/parkin-dependent mitophagy and enhanced mitochondrial fission to maintain the mitochondria quality control process. Conclusion: Low-dose of caffeine alleviated HAPE by promoting PINK1/parkin-dependent mitophagy and mitochondrial fission to control the mitochondria quality. Therefore, caffeine could be a potential treatment for HAPE.

Impact of Some Herbicides on Growth Indicators of Some Wheat Cultivars and Weight of Companion Weeds

An experiment was implemented in the experimental field of the Department of Field Crops, College of Agricultural Engineering Sciences, University of Baghdad, Jadriya during the year 2020-2021. The study aimed to investigate the effect of some herbicides (Crash + U46-Combifiluid) combination and Axial, Weed Free and Weedy, on the companion weeds and growth indicators for three cultivars of wheat (Shame6, Samur, and GRAIME). The experiment was conducted according to a RCBD (in a split-plot arrangement with three replicates), while the cultivars represent the main treatments and herbicide treatments. The results showed the superiority of cultivar GRAIME in the trait of the number of tiller. meters 2 and the flag leaf area (centimeter2), as it recorded averages of 469.90 meters2 and 22.61 centimeter2 respectively. The cultivars did not differ significantly between them in terms of the dry weight of plants. In comparison, the cultivar Samur recorded the highest plant height of 135.12 centimeter and the lowest weed dry weight was 40.44 gram. meters-2, recording the highest inhibition ratio in the weed dry weight amounted to 62.60%. The combination treatment (Crash + U46-Combifiluid) for all traits was superior to the weedy treatment, which recorded the lowest averages, as it recorded 459.9 tiller.meters2, 124.89 centimeter, 22.70 centimeter 2, and 1344 gram. meters -2 for the number of tillers, plant height, flag leaf area, and the dry weight of wheat plants, respectively. Besides, the lowest average weed dry weight was 6.55 gram. meters -2 and the highest inhibition ratio in the weed dry weight was 93.97%, it was close to the results of the weed-free treatment. The treatment of cultivar GRAIME with (Crash + U46-Combifiluid) combination achieved the highest mean for the number of tillers, flag leaf area, and dry weight of wheat plants reaching 515.70 tiller. meters 2 and 25.20 centimeter 2 and 1371.20 gram. meters-2 respectively, In comparison, the lowest weed dry weight was achieved in the treatment of cultivar Samur and Shame6 with the combination of (Crash + U46-Combifiluid) reached 0.00 and 5.80 gram. meters-2 respectively and recorded the highest inhibition ratio of weed dry weight reached 100% and 94.44% respectively.

Effect of Biofertilizers and Foliar Application of Zinc on Growth and Yield of Groundnut (Arachis hypogea L.)

A field experiment was conducted during Zaid 2022 at Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P). The experiment was laid out in Randomized Block Design with ten treatments each replicated thrice on the basis of one year experimentation. The results showed that application of PSB 20g/kg seed + 0.75% ZnSO4 was recorded significantly higher plant height (97.37 cm), Number of nodules/plant (112.60), Plant dry weight (18.41 g/plant), Pods/plant (31.2), Seeds/pod (2.20), Test weight (38.46 g), Pod yield (3.00 t/ha), Seed yield (2.46 t/ha), Haulm yield (4.94 t/ha), Harvest index (49.83%), Shelling percentage (82.13%), gross returns (Rs.98,508.00/ha), net return (Rs.71,388.00/ha) and benefit cost ratio (2.63).

Short-Term Co-Application of Organic and Chemical Fertilizer Benefits Topsoil Properties and Maize Productivity in a Medium-Productivity Meadow-Cinnamon Soil

Co-application of organic-chemical fertilizer (CAOFCF) has attracted wide attention in China in recent years. However, its short-term effect on topsoil quality and maize yield in a medium-productivity meadow-cinnamon soil is not clear. In order to address this problem, a 3-year (2019–2021) field trial was established by arranging the following five treatments: (1) CF, applying chemical fertilizer alone; (2) OFCF1, 15% organic fertilizer + 85% chemical fertilizer; (3) OFCF2, 30% organic fertilizer + 70% chemical fertilizer; (4) OFCF3, 45% organic fertilizer + 55% chemical fertilizer; (5) OFCF4, 60% organic fertilizer + 40% chemical fertilizer. The results showed that short-term CAOFCF treatments were beneficial to the topsoil aggregate stability by increasing the percentage and mean weight diameter of macro-aggregate in topsoil. In addition, lower soil bulk density and higher soil organic carbon sequestration in topsoil were observed under the CAOFCF treatments. There was no difference in rhizosphere microbial diversity among all treatments. Compared to CF, OFCF1 and OFCF2 improved the activities of some key enzymes, including sucrase, urease, and acid phosphatase. Moreover, higher relative abundance of Actinobacteria and Chloroflexi were observed under the CAOFCF treatments. The root-shoot dry matter and maize grain yield were obviously higher in OFCF1 and OFCF2 than in CF; however, no significant difference was found in the OFCF3 and OFCF4 treatments compared to CF. The analysis of correlation suggested that there were no direct correlations between maize yield and various soil indexes measured. Nevertheless, root dry weight and root-shoot ratio were positively correlated with the activities of urease and sucrase. Meanwhile, the relationships between root dry weight, root-shoot ratio, shoot dry weight, and grain yield were all significant. In conclusion, short-term co-application of organic and chemical fertilizer (i.e., replacing 15–30% chemical fertilizer with organic fertilizer with an equal N rate) was beneficial to soil properties and maize grain yield in a medium-productivity meadow-cinnamon soil. The higher grain yield was associated with a strong maize root system, which was driven by the improved rhizosphere urease and sucrase activities.

Different ratios of raw material triggered composting maturity associated with bacterial community co-occurrence patterns

Exploring the ecological function of potential core bacteria for high-efficiency composting can provide a fundamental understanding of the role of composting bacterial communities. Mushroom residue and kitchen garbage at different ratios (N1: 1/1, N2: 1/2) of dry weight were tested to investigate the key ecological role of the core bacteria responsible for producing mature compost. N1 had a peak temperature of 75.0 °C which was higher than N2 (68.3 °C). Other key composting parameters (carbon to nitrogen ratio (C/N) and germination index (GI)) also indicated that N1 achieved higher compost maturity. Rice seedlings experiments also further validated this conclusion. Putative key bacterial taxa (Thermobifida, Luteimonasd, Bacillus, etc.) were positively associated with the GI, indicating a substantial contribution to composting maturity. Co-occurrence network analysis revealed the ecological function of potentially beneficial core bacteria promoted cooperation among the bacterial community. The putative core bacteria in N1 may affect composting efficiency. Our findings reveal the mechanism of potential core bacteria throughout the compost maturity phases.

An extended kinetic model-based correction factor equation to account hemodialysis post-treatment hemoconcentration.

The hemoconcentration effect for middle weight solutes in hemodialysis is corrected by oversimplified methods based on hematocrit changes or distribution volume variations. Here we implemented a variable volume dual pool kinetic model targeted at obtaining a precise correction factor equation for extracellularly distributed solutes based on relevant kinetic parameters such as the ultrafiltration to dry weight ratio UF/DW, the dialyzer clearance, Kd, the intercompartment mass-transfer coefficient, Kc, and the central compartment to extracellular volume ratio, α. More than 300,000 solutions of the model were computed, performing a sweep among physiological values of the proposed kinetic parameters, resulting in a linear regression denoted by the expression fcorr = 1.0707 - 5.2246 (UF/DW) - 0.0005 Kd - 0.0004 Kc - 0.0007 α, with an excellent coefficient of determination R2 = 0.983. The presented fcorr provides a substantial extension of the currently implemented methods to estimate the hemoconcentration factor for middle and high molecular weight extracellular distributed solutes in hemodialysis.

THE EFFECT OF LOCAL MICROORGANISMS FROM COCONUT HUSK ON THE GROWTH OF OIL PALM (Elaeis guineensis Jacq.) IN THE MAIN NURSERY

THE EFFECT OF LOCAL MICROORGANISMS FROM COCONUT HUSK ON THE GROWTH OF OIL PALM (Elaeis guineensis Jacq.) IN THE MAIN NURSERY

Comprehensive evaluation of agronomic traits and mineral elements of Auricularia heimuer cultivated on corncob substrates

Auricularia heimuer is the third largest cultivated edible mushroom in the world, which not only possesses a unique taste but also is enriched with nutrients. In order to explore the efficient utilization value of lignocellulose in corncob for mushroom production, this paper was conducted by setting high substitution rate of corncob (70%, 81%, 93%) formulas for cultivation. Principal component analysis (PCA) was used to evaluate the main agronomic traits and mineral elements of the substracts, comprehensively. The results showed that the C/N ratio and lignin content in the substrates were positively correlated with the agronomic traits of Auricularia heimuer. In contrast, cellulose and hemicellulose were negatively correlated with them. The range of the C/N ratio was 50.70%, and biological efficiency (BE) was 50% at 70% corncob substitution, with a remarkable improvement in terms of yield traits (mushroom weight, yield, BE) and quality traits (size, thickness, fresh to dry weight ratio, rehydration ratio, mineral element content). The content of macroelements produced by corncob was better than that produced by sawdust. The higher substitution ratio of corncob, the higher the macroelements of the fruiting body. The microelements (Fe, Se, Mn, Mo, B) of the fruiting body in sawdust were significantly better than that in the corncob substrates. PCA showed that the two principal components represented 94.61% of the 11 agronomic traits and mineral elements composition of the four corncobs under high substitution formulas. When the corncob substitution rate was less than 70%, the fruiting body produced by the formula exhibited comprehensive utilization value in terms of quality and quantity. In this study, corncob as a low-value agricultural waste was environmentally transformed into a new resource that could be used to produce high-value edible fungi, which provides a theoretical basis for accelerating the efficient utilization of substrate and the commercialization of mushrooms at industrial level.

Effects of Nintedanib associated with Shenfu Injection on paraquat-induced lung injury in rats

Objective: To study the effects of Nintedanib associated with Shenfu Injection on lung injury induced by paraquat (PQ) intoxication. Methods: In September 2021, a total of 90 SD rats were divided into 5 groups in random, namely control group, PQ poisoning group, Shenfu Injection group, Nintedanib group and associated group, 18 rats in each group. Normal saline was given by gavage route to rats of control group, 20% PQ (80 mg/kg) was administered by gavage route to rats of other four groups. 6 hours after PQ gavage, Shenfu Injection group (12 ml/kg Shenfu Injection), Nintedanib group (60 mg/kg Nintedanib) and associated group (12 ml/kg Shenfu Injection and 60 mg/kg Nintedanib) were administered with medicine once a day. The levels of serum transforming growth factor beta1 (TGF-β1), interleukin-1 beta (IL-1β) were determined at 1, 3 and 7 d, respectively. The pathological changes of lung tissue, the ratio of wet weight and dry weight (W/D) of lung tissue, the levels of superoxide dismutase (SOD) and malondialdehyde (MDA) in lung tissue were observed and determined after 7 d. Western blot was used to analyse the expression levels of fibroblast growth factor receptor 1 (FGFR1), platelet derivation growth factor receptor alpha (PDGFRα), vascular endothelial growth factor receptor 2 (VEGFR2) in lung tissue after 7 d. Results: The levels of TGF-β1, IL-1β in all poisoning groups went up first and then went down. The levels of TGF-β1, IL-1β in associated group at 1, 3, 7 d were lower than that of PQ poisoning group, Shenfu Injection group and Nintedanib group at the same point (P<0.05). Pathological changes of lung tissue under the light microscopes showed that the degrees of hemorrhage, effusion and infiltration of inflammatory cells inside the alveolar space of Shenfu Injection group, Nintedanib group and associated group were milder than that of PQ poisoning group, and the midest in associated group. Compared with control group, the W/D of lung tissue was higher, the level of MDA in lung tissue was higher, while the level of SOD was lower, the expressions of FGFR1, PDGFRα and VEGFR2 in lung tissue were higher in PQ poisoning group (P<0.05). Compared with PQ poisoning group, Shenfu Injection group and Nintedanib group, the W/D of lung tissue was lower, the level of MDA in lung tissue was lower, while the level of SOD was higher, the expressions of FGFR1, PDGFRα and VEGFR2 in lung tissue were lower in associated group (P<0.05) . Conclusion: Nintedanib associated with Shenfu Injection can relieve lung injury of rats induced by PQ, which may be related to Nintedanib associated with Shenfu Injection can inhibit the activation of TGF-β1 and the expressions of FGFR1, PDGFRα, VEGFR2 in lung tissue of rats.

Investigation of physiological energetic response of the thick shell mussel, Mytilus coruscus, to microplastics and low salinity: Potential countermeasures to multi-environmental changes

Microplastics (MPs) contamination and salinity fluctuation are two common phenomena on the East China Sea coast. The purpose of this experiment was to evaluate the combined effects of MPs and salinity on the energy budget of the thick shell mussel Mytilus coruscus. Juvenile mussels were exposed to six combined treatments with three MPs levels (0, 10 and 1000 items L−1) and two salinity levels (15, 25) for 28 d. The clearance rate, food absorption efficiency, respiration rate, ammonium excretion rate, and O:N ratio were significantly reduced, and the fecal organic dry weight ratio was significantly increased at salinity 15, inducing a reduction in the scope for growth. Under salinity 15, 1000 items L−1 MPs had significant negative effects on growth at Day 28. However, under salinity 25, the results were opposite in that the level of 1000 items L−1 MPs brought an obvious increment in scope for growth at Day 28. This meant that there were interactions between salinity and MPs in scope for growth at Day 28. These results suggest that the physiological energetics of juvenile M. coruscus can acclimate to MPs contamination with little physiological effect under normal salinity. This experiment has revealed that although marine MPs contamination is of concern, marine organisms likely have a significant capacity to adapt to it.

Towards a circular economy in virgin olive oil production: Valorization of the olive mill waste (OMW) “alpeorujo” through polyphenol recovery with natural deep eutectic solvents (NADESs) and vermicomposting

Virgin olive oil (VOO) production generates large amounts of a harmful by-product, olive mill waste (OMW) or alpeorujo, which has a strong environmental impact and that must be recycled to adapt VOO production to a circular economy model. Here, the valorization of OMW was studied by considering three consecutive stages: Stage 1 involves the generation of OMW; Stage 2 the recovery of bioactive phenolic compounds from the fresh OMW using natural deep eutectic solvents (NADESs), generating a valuable phenolic extract and a new by-product, a dephenolized OMW named “alpeoNADES”; and Stage 3 involves vermicomposting alpeoNADES with Eisenia fetida earthworms. Six NADES were formulated and tested, selecting a NADES composed of citric acid and fructose (CF) derived from food grade and biodegradable substances. CF was the most effective solvent to obtain phenolic extracts for nutraceutical and agronomical purposes, extracting 3988.74 mg/kg of polyphenols from fresh OMW. This alpeoNADES is a non-palatable substrate for E. fetida earthworms, as the residual CF gives it an acidic pH (pH 2). Its palatability was improved by mixing it with horse manure and straw for vermicomposting, in a 1:1 and 3:1 dry weight ratio. When these substrates were precomposted for 3 weeks they reached pH 5.5–6 and they could then be vermicomposted for 23 weeks (using OMW as a control). The best substrate for vermicomposting was determined by the worm biomass, growth rate, carbon to nitrogen (C:N) ratio, and N and P content. AlpeoNADES and manure 3:1 produced the highest quality vermicompost in the shortest time, generating a product that complied with European standards for organic fertilizers. Hence, alpeoNADES was recycled to a low-cost, organic balanced fertilizer in Stage 3, enabling the olive oil industry to transition to sustainable production through this integrated circular economy design.

Growth Performance of Bay (Laurus nobilis L.) Under Different Amount, Period of Watering and NPK

The aim of this work was to estimate the growth of Laurus nobilis seedlings under different levels, period of water and its interaction with NPK. Different amounts of water (150, 300 and 400) ml/polyethylene bag and irrigation intervals (two different scales are considered, once per week and once per two weeks) were used in addition to different amounts of NPK (zero (control), 500, 1000 ppm). Multi‐measurements and strategy was utilized for measuring stem length, stem diameter, root length, root diameter, moisture content, stem wet weight, stem dry weight, root wet weight, root dry weight and shoot root ratio. The results showed that bay seedlings had significantly affected by water amount (150ml) as well as water period (once per two weeks). Water deficit is therefore more commonly limiting seedlings growth than NPK through growing season. Therefore, sensitivity of bay seedlings to limitation water has indicated that decreasing in stem length, stem diameter, number of leaves, root diameter, moisture content, stem wet weight, stem dry weight, root wet weight, root dry weight and root shoot ratio (12.56cm, 3.35mm, 17, 3.66mm, 3.67%, 5.42g, 5.59g, 5.96g, 4.99g, 0.05). However, seedlings with three interaction (450ml, once/week and 1000ppm) had displayed significant differences through stem length, number of leaves, root diameter, moisture content, stem wet weight, stem dry weight, and root wet weight, root dry weight and root shoot ratio (28.16cm, 29, 6.57mm, 19.33%, 11.85g, 8.35g, 8.10g, 6.26g, 1.37 respectively). It is concluded that Laurus nobilis seedlings could not success in this area, especially under low water availability.&#x0D; &#x0D;

Evaluation of Forage Crops Production and Quality of Two Different Rangelands in Sulaimani Governorate

This study was conducted during 2015 in Sulaimani governorate at two main different locations of Sharbazher, Dukan, each one with some sub-locations, the sub- location of sharbazher that contains (Qalachwlan, Bnawela, Kana-Swra, Byana, Bazarw and Kane-Bewka) . The sub- location of Dukan that contains (Mergapan, Kwera-Kane, Hanaran, Qzlar and Kilka-Smaq) to estimate fresh yield, dry yield, dry matter and animal unit. The rangeland areas of Sulaimani governorate located between 350 10' – 360 27' N and 440 40' – 460 22' E were restricted, 250017 and658801 ha for Sharbazher and Dukan locations respectively. The most important results indicated that, it was noticed that the sub-location of Qalachwalan at sharbazher location gave the maximum values of plant height, stem dry weight, leaf dry weight and Leaf Stem ratio for both legumes and grasses with 27.22, 52.9 cm, 5.28% and1.80% as the means of nine replicates respectively. However, the sub-location of Mergapan at Dwkan location gave the maximum values of plant height with 40.43, 69.00cm for both legumes and grasses respectively.Dukan location gave the maximum value of total dry yield 970431.60 ton and 2940701.80 Animal unit/three months, while Sharbazher location which gave the minimum value total dry yield of 17216.20 ton and 52170.30 animal unit/3 months as the means of four replicates respectively. The highest fresh yield, dry yield and animal unit obtained Dukan, location which 13348.27 and 2554.85 kg/ha 2940701.80 animal unit respectively .Results of chemical analysis for the grass and legume plants showed that there were differences between locations. Dukan location gave the maximum percentage of protein content, Carbohydrate, fiber, and magnesium which were (8.75, 17.80 ,19.50 , and 0.74 %) respectively, for legume plants .However, chemical contents for grass plant showed that Sharbazher location gave the maximum percentage of carbohydrate, fiber, oil , phosphorous and ash contents which were (22.28 , 23.50 , 1.22 , 1.33 and 11.01 %), respectively.

Genç Kızılçam Biyokütle Denklemleri; Kozağacı Orman İşletme Şefliği Örneği

Ormanların karbon depolama kapasitelerine ilişkin hesaplamalar tüm dünyada giderek daha önemli hale gelmiştir. Karbon bildirimlerinde uluslararası kurumlar, orman ekosistemlerinde depolanan karbon miktarlarının envantere dayalı olarak, tam ve kesin olarak belirlenmesini arzu etmektedir. Tüm ülkenin ormanlık alanlarındaki karbon stokunun belirlenmesi için, her ağaç türünün farklı habitatlarda biriktirdiği biyokütle miktarının ve bağladıkları karbon miktarının yöresel olarak belirlenmesi gerekmektedir. Bu çalışmada genç kızılçamlar yöresel olarak dikkate alınarak, Mersin Kozağacı Orman İşletme Şefliği içerisindeki saf kızılçam meşcerelerine ait toprak üstü ve toprak altı biyokütle denklemleri geliştirilmiştir. Çalışmada ayrıca kızılçam için odun yoğunluk oranı ve ibre kuru ağırlık oranı belirlenmiştir.

Oxygen consumption and transportation in rice roots are highly dependent on leaf area and root dry weight ratio

As rice is cultivated under diverse moisture conditions from paddy to field, the internal morphology of their roots may be diverse within species. This study aimed to investigate which traits affect the root oxygen consumption and transportation ability using rice varieties with different root anatomical traits. First, the CSR of seminal roots of six rice varieties was used to identify a variety with a low CSR. Results showed that the CSR in Sensho was the lowest in both aerated and stagnant solutions. Second, the shoot morphological traits, root anatomical traits, and root oxygen consumption and transportation of four rice varieties, including Sensho, were examined in preaerated and deoxygenated agar solutions. Results showed that deoxygenated conditions did not have any negative effects on the growth of the rice varieties. The root oxygen consumption rates were strongly positively correlated with the leaf area/root dry weight (LA/RDW, r = 0.90). The root oxygen transportation rates were also positively correlated with LA/RDW (r = 0.57). The percentage of root oxygen consumption compensated by oxygen transportation was highest in IR42, which had a low LA/RDW. Multiple regression using stomatal conductance, LA/RDW, and shoot dry weight as explanatory variables explained only 65.0% of oxygen transportation. We concluded that further studies on gas movements inside the shoots and roots are needed to clarify the mechanism that provides more sufficient oxygen to the roots.

Identification of a Saltol-Independent Salinity Tolerance Polymorphism in Rice Mekong Delta Landraces and Characterization of a Promising Line, Doc Phung

The Mekong Delta River in Vietnam is facing salinity intrusion caused by climate change and sea-level rise that is severely affecting rice cultivation. Here, we evaluated salinity responses of 97 rice accessions (79 landraces and 18 improved accessions) from the Mekong Delta population by adding 100 mM NaCl to the nutrient solution for up to 20 days. We observed a wide distribution in salinity tolerance/sensitivity, with two major peaks across the 97 accessions when using the standard evaluation system (SES) developed by the International Rice Research Institute. SES scores revealed strong negative correlations (ranging from − 0.68 to − 0.83) with other phenotypic indices, such as shoot elongation length, root elongation length, shoot dry weight, and root dry weight. Mineral concentrations of Na+ in roots, stems, and leaves and Ca2+ in roots and stems were positively correlated with SES scores, suggesting that tolerant accessions lower their cation exchange capacity in the root cell wall. The salinity tolerance of Mekong Delta accessions was independent from the previously described salinity tolerance–related locus Saltol, which encodes an HKT1-type transporter in the salinity-tolerant cultivars Nona Bokra and Pokkali. Indeed, genome-wide association studies using SES scores and shoot dry weight ratios of the 79 accessions as traits identified a single common peak located on chromosome 1. This SNP did not form a linkage group with other nearby SNPs and mapped to the 3′ untranslated region of gene LOC_Os01g32830, over 6.5 Mb away from the Saltol locus. LOC_Os01g32830 encodes chloroplast glycolate/glycerate translocator 1 (OsPLGG1), which is responsible for photorespiration and growth. SES and shoot dry weight ratios differed significantly between the two possible haplotypes at the causal SNP. Through these analyses, we characterize Doc Phung, one of the most salinity-tolerant varieties in the Mekong Delta population and a promising new genetic resource.

Exogenous Diethylaminoethyl Hexanoate Highly Improved the Cold Tolerance of Early japonica Rice at Booting

Rice (Oryza sativa L.) is highly sensitive to cold stress, which leads to large reductions in rice yield at the booting stage. In this study, Kongyu131 and Kenjiandao6 rice cultivars with different levels of cold stress sensitivity were sprayed with diethylaminoethyl hexanoate (DA-6) concentrations of 500, 200, 20, 2, 0.2, and 0 mg/L one day before undergoing cold water stress (CWS). We analyzed changes in yield and its factors, dry matter production, stem characteristics, and physiological and biochemical characteristics of the rice plants. The results showed that DA-6 increased peroxidase activity, delayed nitrogen and chlorophyll degradation, maintained soluble protein and potassium contents, and suppressed the accumulation of malondialdehyde in the leaves of both cultivars under CWS. DA-6 also increased the phosphorous content and superoxide dismutase activity in Kenjiandao6 under CWS; however, in Kongyu131, DA-6 increased the soluble sugar content. In addition, DA-6 treatment increased the weight of the panicle at maturity, and of the leaf, panicle, and stem-sheath at heading in both cultivars. The lengths of the panicle, the top first internode, the export rate of stem-sheath, translocation rate of stem-sheath, and export of stem-sheath from heading to maturity were increased in Kenjiandao6; however, in Kongyu131, DA-6 increased the dry weight ratio of panicle to total plant and reduced the dry weight ratio of stem-sheath to total plant at maturity. Furthermore, DA-6 improved yield in both cultivars, mainly by increasing the grain weight in the inferior grains (IG) and middle grains (MG) under CWS. DA-6 increased the grain weight in the IG and MG in Kenjiandao6 mainly by enhancing the seed setting rate and number of filled grains (NFG) in the IG and MG, and in Kongyu131 by improving the NFG in MG and IG. The optimal concentration of DA-6 to alleviate CWS was 2 mg/L. In conclusion, exogenous DA-6 was effective for maintaining dry matter production and physiology in two early japonica rice cultivars under CWS at booting, thereby improving cold tolerance and enhancing yield. The less cold-tolerant cultivar Kenjiandao6 was more sensitive to the effects of DA-6 and displayed better results than the more cold-tolerant cultivar Kongyu131.

PRODUCTIVITY Panicum maximum cv. Trichoglume WITH DIFFERENT TYPES AND DOSAGE OF ORGANIC FERTILIZER

&#x0D; &#x0D; &#x0D; This study aims to determine the productivity of Panicum maximum cv. Trichoglume with different types and dosage of organic fertilizer. The trial was for 2 months, with factorial completely randomized design (CRD). The first factor were type of organic fertilizer: S (cow manure); K (goat manure); and SK (cow and goat manure), and second factor was dosage of organic fertilizer: D0 (0 ton ha-1); D1 (10 tons ha-1); D2 (20 tons ha-1); and D3 (30 tons ha-1). There were 12 treatment combinations and each treatment was repeated 4 times. The observed variables : growth variables, yield variables and growth characteristics variables. The results showed that there was no inter- action between the type and dosage of organic fertilizer in increasing the productivity of Panicum maximum cv. Trichoglume. The use of cow and goat manure (SK) can increase the number of leaves, number of branches, plant height, leaf dry weight, stem dry weight, total dry weight of forage, leaf area per pot, ratio of leaf dry weight to stem and weight ratio completely dry forage with roots. Dosage of organic fertilizer from 10-30 tons ha-1 can increase the productivity of Panicum maximum cv. Trichoglume on the variable number of tillers, number of leaves, number of branches, dry weight of leaves, dry weight of stems, total dry weight of forage, leaf area per pot, ratio of dry weight of leaves to stem and ratio of total dry weight of forage to roots, and the best results in dosage of 30 tons ha-1. It was concluded to increase the productivity of Panicum maximum cv. Trichoglume with cow and goat manure fertiliza- tion at dosage 30 tons ha-1.&#x0D; &#x0D; &#x0D;