The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Zhengyang Zhao - One of the best experts on this subject based on the ideXlab platform.
-
Mulching practices alter soil microbial functional diversity and benefit to soil quality in orchards on the Loess Plateau.
Journal of environmental management, 2020Co-Authors: Yuanji Wang, Li Liu, Mukesh Kumar Awasthi, Qianqian Huang, Chen Liu, Yuanyuan Ding, Yuli Tian, Zhengyang ZhaoAbstract:To improve our understanding about the responses of microbial functional diversity to different mulching practices, this study used a metagenomic approach to reveal soil microbial functional specificity under four tillage regimes: conventional tillage (CT), organic mulch practices with ryegrass (Lolium perenne L.) intercropping cover (RE) and cornstalk mulch (CS), and inorganic mulching with black Ground Fabric (BF) in a 7-year field experiment in an apple orchard of the Loess Plateau in China. Enzyme activity and soil physicochemical properties were measured. A redundancy analysis showed that the RE and CS treatments had positive effects on soil nutrient and enzyme activity compared to that of the BF and CT treatments. The CS and RE treatments increased β-glucosidase, cellobiohydrolase, and β-xylosidase activities. In addition, the CS treatment significantly enhanced the β-N-acetylglucosaminidase and urease activities compared to that under CT treatment. However, the activity of these enzyme was reduced in the BF treatment compared with that of the CT treatment. The results also indicated that the enzymes activities were not completely consistent with the changing trends of the genes encoding these enzymes. In addition, the RE and CS treatments also increased the abundance of genes encoding carbohydrate enzymes. It is interesting that the RE and CS treatments had more pathway genes associated with the carbon cycle, nitrogen cycle, and amino acid metabolism compared with the BF treatment. Remarkably, RE and CS treatments effectively increased the abundance of carbon fixation gene cbbL compared to CT treatment. In summary, organic mulching practices increased the soil microbiological functional diversity related to the carbon and nitrogen cycle, while inorganic mulching practice reduced them. This study enhanced our understanding of how mulching practices may alter soil microbial functional diversity and benefit soil quality.
-
Mulching practices alter the bacterial-fungal community and network in favor of soil quality in a semiarid orchard system.
The Science of the total environment, 2020Co-Authors: Yuanji Wang, Li Liu, Yu Luo, Mukesh Kumar Awasthi, Jianfeng Yang, Yumin Duan, Zhengyang ZhaoAbstract:The study aimed to investigate how mulching practices can improve soil quality by altering microbial community composition and the interrelations among its members. The experiment was conducted for 7 years (from 2012 to 2018) in an apple (Malus domestica cv. Fuji) orchard located on the Loess Plateau, China. Four treatments were applied: conventional tillage (CT), intercrop ryegrass (Lolium perenne L.) cover (RE), inter-row cornstalk mulch (CS), and black Ground Fabric mulch (BF). The results indicated that compared to CT treatment, all the three mulching practices significantly increased soil moisture content. The RE and CS treatments improved soil organic matter content by 11.8% and 36.5%, respectively, and CS treatment also increased available nitrogen content in soil by 42.0% compared with CT treatment. The soil environmental heterogeneity under different mulching practices shaped the microbial community structure and the dominant populations. All the mulching practices significantly increased the operational taxonomic unit (OTU) abundance and alpha diversity of fungi, and positively affected bacterial richness. Network analyses showed that the microbial structure was significantly affected by soil water and microbial biomass nitrogen. Interestingly, based on network correlation analysis among microorganisms, the BF treatment reduced competition between bacteria, whereas RE treatment increased their cooperation, however, the CS treatment not only promoted cooperation between fungi, but also increased correlations between fungi and bacteria. Finally, our results indicated that mulching practices not only increased the diversity of microorganisms and abundance of dominant species, but also promoted the interrelations among microorganisms in favor of soil quality.
Yuanji Wang - One of the best experts on this subject based on the ideXlab platform.
-
Mulching practices alter soil microbial functional diversity and benefit to soil quality in orchards on the Loess Plateau.
Journal of environmental management, 2020Co-Authors: Yuanji Wang, Li Liu, Mukesh Kumar Awasthi, Qianqian Huang, Chen Liu, Yuanyuan Ding, Yuli Tian, Zhengyang ZhaoAbstract:To improve our understanding about the responses of microbial functional diversity to different mulching practices, this study used a metagenomic approach to reveal soil microbial functional specificity under four tillage regimes: conventional tillage (CT), organic mulch practices with ryegrass (Lolium perenne L.) intercropping cover (RE) and cornstalk mulch (CS), and inorganic mulching with black Ground Fabric (BF) in a 7-year field experiment in an apple orchard of the Loess Plateau in China. Enzyme activity and soil physicochemical properties were measured. A redundancy analysis showed that the RE and CS treatments had positive effects on soil nutrient and enzyme activity compared to that of the BF and CT treatments. The CS and RE treatments increased β-glucosidase, cellobiohydrolase, and β-xylosidase activities. In addition, the CS treatment significantly enhanced the β-N-acetylglucosaminidase and urease activities compared to that under CT treatment. However, the activity of these enzyme was reduced in the BF treatment compared with that of the CT treatment. The results also indicated that the enzymes activities were not completely consistent with the changing trends of the genes encoding these enzymes. In addition, the RE and CS treatments also increased the abundance of genes encoding carbohydrate enzymes. It is interesting that the RE and CS treatments had more pathway genes associated with the carbon cycle, nitrogen cycle, and amino acid metabolism compared with the BF treatment. Remarkably, RE and CS treatments effectively increased the abundance of carbon fixation gene cbbL compared to CT treatment. In summary, organic mulching practices increased the soil microbiological functional diversity related to the carbon and nitrogen cycle, while inorganic mulching practice reduced them. This study enhanced our understanding of how mulching practices may alter soil microbial functional diversity and benefit soil quality.
-
Mulching practices alter the bacterial-fungal community and network in favor of soil quality in a semiarid orchard system.
The Science of the total environment, 2020Co-Authors: Yuanji Wang, Li Liu, Yu Luo, Mukesh Kumar Awasthi, Jianfeng Yang, Yumin Duan, Zhengyang ZhaoAbstract:The study aimed to investigate how mulching practices can improve soil quality by altering microbial community composition and the interrelations among its members. The experiment was conducted for 7 years (from 2012 to 2018) in an apple (Malus domestica cv. Fuji) orchard located on the Loess Plateau, China. Four treatments were applied: conventional tillage (CT), intercrop ryegrass (Lolium perenne L.) cover (RE), inter-row cornstalk mulch (CS), and black Ground Fabric mulch (BF). The results indicated that compared to CT treatment, all the three mulching practices significantly increased soil moisture content. The RE and CS treatments improved soil organic matter content by 11.8% and 36.5%, respectively, and CS treatment also increased available nitrogen content in soil by 42.0% compared with CT treatment. The soil environmental heterogeneity under different mulching practices shaped the microbial community structure and the dominant populations. All the mulching practices significantly increased the operational taxonomic unit (OTU) abundance and alpha diversity of fungi, and positively affected bacterial richness. Network analyses showed that the microbial structure was significantly affected by soil water and microbial biomass nitrogen. Interestingly, based on network correlation analysis among microorganisms, the BF treatment reduced competition between bacteria, whereas RE treatment increased their cooperation, however, the CS treatment not only promoted cooperation between fungi, but also increased correlations between fungi and bacteria. Finally, our results indicated that mulching practices not only increased the diversity of microorganisms and abundance of dominant species, but also promoted the interrelations among microorganisms in favor of soil quality.
R C Beeson - One of the best experts on this subject based on the ideXlab platform.
-
water relations of field grown quercus virginiana mill from preharvest through containerization and 1 year into a landscape
Journal of the American Society for Horticultural Science, 1994Co-Authors: R C BeesonAbstract:Large (≈5 m high) Quercus virginiana Mill. (live oak) trees produced in 0.64-m-diameter in-Ground Fabric containers were root pruned or not root pruned inside containers before harvest. Harvested trees were grown in two sizes of polyethylene containers for 10 months, then transplanted into a landscape. Water potential ( ψ T ) of small branches (<4 mm in diameter) was measured diurnally during containerization and for 1 year in the landscape. Root pruning had no influence on postharvest survival. Neither root pruning nor container size affected tree water status during containerization or in the landscape. All surviving trees recovered from transplant shock following harvest after 16 weeks in a container, independent of treatment. In the landscape, 35 weeks of daily irrigation were required before dusk ψ T declined to within 0.1 MPa of predawn values, a result indicating alleviation of transplant shock. Trunk growth rate during containerization was highest in larger containers. However, in the landscape, root pruning and small containers were associated with higher trunk growth rate. Tree water status during containerization and in the landscape is discussed. Due to the adverse impact of several freezes in the early 1980s on citrus groves, many groves in Florida were replanted with shade trees. Most groves used in-Ground Fabric containers (Whitcomb, 1985) since they were on coarse, excessively drained sandy soils, a condition that made spade or ball and burlap operations difficult. By 1989, lack of information and improper handling resulted in the death of many transplanted trees. This reduced marketability and forced farms to containerize harvested Fabric-grown trees by removing the Fabric containers from root balls and transplanting the trees into large containers filled with a pine bark-based me- dium. Trees were allowed to increase canopy density and regener- ate their roots to fill the containers before marketing. There were no standard ratios of container to root-ball volumes in the industry. The container size used depended on cost, tree caliper, and pro- ducer preference. Trees of similar size and age could be found growing in containers differing in volume by 100%. Significant tree loss, especially with Quercus virginiana (live oak), occurred at most tree farms during containerization, usually within a few weeks after field harvest. For surviving trees, the effect of different container volumes for similar sized trees transplanted into land-
-
Water Relations of Field-grown Quercus virginiana Mill. from Preharvest through Containerization and 1 Year into a Landscape
Journal of the American Society for Horticultural Science, 1994Co-Authors: R C BeesonAbstract:Large (≈5 m high) Quercus virginiana Mill. (live oak) trees produced in 0.64-m-diameter in-Ground Fabric containers were root pruned or not root pruned inside containers before harvest. Harvested trees were grown in two sizes of polyethylene containers for 10 months, then transplanted into a landscape. Water potential ( ψ T ) of small branches (
Mukesh Kumar Awasthi - One of the best experts on this subject based on the ideXlab platform.
-
Mulching practices alter soil microbial functional diversity and benefit to soil quality in orchards on the Loess Plateau.
Journal of environmental management, 2020Co-Authors: Yuanji Wang, Li Liu, Mukesh Kumar Awasthi, Qianqian Huang, Chen Liu, Yuanyuan Ding, Yuli Tian, Zhengyang ZhaoAbstract:To improve our understanding about the responses of microbial functional diversity to different mulching practices, this study used a metagenomic approach to reveal soil microbial functional specificity under four tillage regimes: conventional tillage (CT), organic mulch practices with ryegrass (Lolium perenne L.) intercropping cover (RE) and cornstalk mulch (CS), and inorganic mulching with black Ground Fabric (BF) in a 7-year field experiment in an apple orchard of the Loess Plateau in China. Enzyme activity and soil physicochemical properties were measured. A redundancy analysis showed that the RE and CS treatments had positive effects on soil nutrient and enzyme activity compared to that of the BF and CT treatments. The CS and RE treatments increased β-glucosidase, cellobiohydrolase, and β-xylosidase activities. In addition, the CS treatment significantly enhanced the β-N-acetylglucosaminidase and urease activities compared to that under CT treatment. However, the activity of these enzyme was reduced in the BF treatment compared with that of the CT treatment. The results also indicated that the enzymes activities were not completely consistent with the changing trends of the genes encoding these enzymes. In addition, the RE and CS treatments also increased the abundance of genes encoding carbohydrate enzymes. It is interesting that the RE and CS treatments had more pathway genes associated with the carbon cycle, nitrogen cycle, and amino acid metabolism compared with the BF treatment. Remarkably, RE and CS treatments effectively increased the abundance of carbon fixation gene cbbL compared to CT treatment. In summary, organic mulching practices increased the soil microbiological functional diversity related to the carbon and nitrogen cycle, while inorganic mulching practice reduced them. This study enhanced our understanding of how mulching practices may alter soil microbial functional diversity and benefit soil quality.
-
Mulching practices alter the bacterial-fungal community and network in favor of soil quality in a semiarid orchard system.
The Science of the total environment, 2020Co-Authors: Yuanji Wang, Li Liu, Yu Luo, Mukesh Kumar Awasthi, Jianfeng Yang, Yumin Duan, Zhengyang ZhaoAbstract:The study aimed to investigate how mulching practices can improve soil quality by altering microbial community composition and the interrelations among its members. The experiment was conducted for 7 years (from 2012 to 2018) in an apple (Malus domestica cv. Fuji) orchard located on the Loess Plateau, China. Four treatments were applied: conventional tillage (CT), intercrop ryegrass (Lolium perenne L.) cover (RE), inter-row cornstalk mulch (CS), and black Ground Fabric mulch (BF). The results indicated that compared to CT treatment, all the three mulching practices significantly increased soil moisture content. The RE and CS treatments improved soil organic matter content by 11.8% and 36.5%, respectively, and CS treatment also increased available nitrogen content in soil by 42.0% compared with CT treatment. The soil environmental heterogeneity under different mulching practices shaped the microbial community structure and the dominant populations. All the mulching practices significantly increased the operational taxonomic unit (OTU) abundance and alpha diversity of fungi, and positively affected bacterial richness. Network analyses showed that the microbial structure was significantly affected by soil water and microbial biomass nitrogen. Interestingly, based on network correlation analysis among microorganisms, the BF treatment reduced competition between bacteria, whereas RE treatment increased their cooperation, however, the CS treatment not only promoted cooperation between fungi, but also increased correlations between fungi and bacteria. Finally, our results indicated that mulching practices not only increased the diversity of microorganisms and abundance of dominant species, but also promoted the interrelations among microorganisms in favor of soil quality.
Li Liu - One of the best experts on this subject based on the ideXlab platform.
-
Mulching practices alter soil microbial functional diversity and benefit to soil quality in orchards on the Loess Plateau.
Journal of environmental management, 2020Co-Authors: Yuanji Wang, Li Liu, Mukesh Kumar Awasthi, Qianqian Huang, Chen Liu, Yuanyuan Ding, Yuli Tian, Zhengyang ZhaoAbstract:To improve our understanding about the responses of microbial functional diversity to different mulching practices, this study used a metagenomic approach to reveal soil microbial functional specificity under four tillage regimes: conventional tillage (CT), organic mulch practices with ryegrass (Lolium perenne L.) intercropping cover (RE) and cornstalk mulch (CS), and inorganic mulching with black Ground Fabric (BF) in a 7-year field experiment in an apple orchard of the Loess Plateau in China. Enzyme activity and soil physicochemical properties were measured. A redundancy analysis showed that the RE and CS treatments had positive effects on soil nutrient and enzyme activity compared to that of the BF and CT treatments. The CS and RE treatments increased β-glucosidase, cellobiohydrolase, and β-xylosidase activities. In addition, the CS treatment significantly enhanced the β-N-acetylglucosaminidase and urease activities compared to that under CT treatment. However, the activity of these enzyme was reduced in the BF treatment compared with that of the CT treatment. The results also indicated that the enzymes activities were not completely consistent with the changing trends of the genes encoding these enzymes. In addition, the RE and CS treatments also increased the abundance of genes encoding carbohydrate enzymes. It is interesting that the RE and CS treatments had more pathway genes associated with the carbon cycle, nitrogen cycle, and amino acid metabolism compared with the BF treatment. Remarkably, RE and CS treatments effectively increased the abundance of carbon fixation gene cbbL compared to CT treatment. In summary, organic mulching practices increased the soil microbiological functional diversity related to the carbon and nitrogen cycle, while inorganic mulching practice reduced them. This study enhanced our understanding of how mulching practices may alter soil microbial functional diversity and benefit soil quality.
-
Mulching practices alter the bacterial-fungal community and network in favor of soil quality in a semiarid orchard system.
The Science of the total environment, 2020Co-Authors: Yuanji Wang, Li Liu, Yu Luo, Mukesh Kumar Awasthi, Jianfeng Yang, Yumin Duan, Zhengyang ZhaoAbstract:The study aimed to investigate how mulching practices can improve soil quality by altering microbial community composition and the interrelations among its members. The experiment was conducted for 7 years (from 2012 to 2018) in an apple (Malus domestica cv. Fuji) orchard located on the Loess Plateau, China. Four treatments were applied: conventional tillage (CT), intercrop ryegrass (Lolium perenne L.) cover (RE), inter-row cornstalk mulch (CS), and black Ground Fabric mulch (BF). The results indicated that compared to CT treatment, all the three mulching practices significantly increased soil moisture content. The RE and CS treatments improved soil organic matter content by 11.8% and 36.5%, respectively, and CS treatment also increased available nitrogen content in soil by 42.0% compared with CT treatment. The soil environmental heterogeneity under different mulching practices shaped the microbial community structure and the dominant populations. All the mulching practices significantly increased the operational taxonomic unit (OTU) abundance and alpha diversity of fungi, and positively affected bacterial richness. Network analyses showed that the microbial structure was significantly affected by soil water and microbial biomass nitrogen. Interestingly, based on network correlation analysis among microorganisms, the BF treatment reduced competition between bacteria, whereas RE treatment increased their cooperation, however, the CS treatment not only promoted cooperation between fungi, but also increased correlations between fungi and bacteria. Finally, our results indicated that mulching practices not only increased the diversity of microorganisms and abundance of dominant species, but also promoted the interrelations among microorganisms in favor of soil quality.
