The Experts below are selected from a list of 107712 Experts worldwide ranked by ideXlab platform
Jun Wang - One of the best experts on this subject based on the ideXlab platform.
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microplastic pollution in vegetable Farmlands of suburb wuhan central china
Environmental Pollution, 2020Co-Authors: Yuling Chen, Yifei Leng, Xiaoning Liu, Jun WangAbstract:Microplastic pollution has become an emergency issue in the global environment. However, little is known about the occurrence and distribution of microplastics in agroecological system. In this study, we investigated the pollution of microplastics in vegetable Farmlands in suburb of Wuhan, central China. Results showed that the abundance of microplastics ranged from 320 to 12,560 items/kgdw. Microplastic pollution adjacent to the suburban roads was about 1.8 times as serious as that in the residential areas. Microplastics with size less than 0.2 mm were dominated, reaching 70% in total. The main types of microplastics were fibers and microbeads. Moreover, polyamide (32.5%) and polypropylene (28.8%) were the main types of polymer. This study proclaims the occurrence and characteristics of microplastic pollution in typical farmland soils of suburb land. It may provide significant basis for subsequent research about microplastics contaminant in the terrestrial ecosystem.
Yuling Chen - One of the best experts on this subject based on the ideXlab platform.
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microplastic pollution in vegetable Farmlands of suburb wuhan central china
Environmental Pollution, 2020Co-Authors: Yuling Chen, Yifei Leng, Xiaoning Liu, Jun WangAbstract:Microplastic pollution has become an emergency issue in the global environment. However, little is known about the occurrence and distribution of microplastics in agroecological system. In this study, we investigated the pollution of microplastics in vegetable Farmlands in suburb of Wuhan, central China. Results showed that the abundance of microplastics ranged from 320 to 12,560 items/kgdw. Microplastic pollution adjacent to the suburban roads was about 1.8 times as serious as that in the residential areas. Microplastics with size less than 0.2 mm were dominated, reaching 70% in total. The main types of microplastics were fibers and microbeads. Moreover, polyamide (32.5%) and polypropylene (28.8%) were the main types of polymer. This study proclaims the occurrence and characteristics of microplastic pollution in typical farmland soils of suburb land. It may provide significant basis for subsequent research about microplastics contaminant in the terrestrial ecosystem.
Xiaoning Liu - One of the best experts on this subject based on the ideXlab platform.
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microplastic pollution in vegetable Farmlands of suburb wuhan central china
Environmental Pollution, 2020Co-Authors: Yuling Chen, Yifei Leng, Xiaoning Liu, Jun WangAbstract:Microplastic pollution has become an emergency issue in the global environment. However, little is known about the occurrence and distribution of microplastics in agroecological system. In this study, we investigated the pollution of microplastics in vegetable Farmlands in suburb of Wuhan, central China. Results showed that the abundance of microplastics ranged from 320 to 12,560 items/kgdw. Microplastic pollution adjacent to the suburban roads was about 1.8 times as serious as that in the residential areas. Microplastics with size less than 0.2 mm were dominated, reaching 70% in total. The main types of microplastics were fibers and microbeads. Moreover, polyamide (32.5%) and polypropylene (28.8%) were the main types of polymer. This study proclaims the occurrence and characteristics of microplastic pollution in typical farmland soils of suburb land. It may provide significant basis for subsequent research about microplastics contaminant in the terrestrial ecosystem.
Yifei Leng - One of the best experts on this subject based on the ideXlab platform.
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microplastic pollution in vegetable Farmlands of suburb wuhan central china
Environmental Pollution, 2020Co-Authors: Yuling Chen, Yifei Leng, Xiaoning Liu, Jun WangAbstract:Microplastic pollution has become an emergency issue in the global environment. However, little is known about the occurrence and distribution of microplastics in agroecological system. In this study, we investigated the pollution of microplastics in vegetable Farmlands in suburb of Wuhan, central China. Results showed that the abundance of microplastics ranged from 320 to 12,560 items/kgdw. Microplastic pollution adjacent to the suburban roads was about 1.8 times as serious as that in the residential areas. Microplastics with size less than 0.2 mm were dominated, reaching 70% in total. The main types of microplastics were fibers and microbeads. Moreover, polyamide (32.5%) and polypropylene (28.8%) were the main types of polymer. This study proclaims the occurrence and characteristics of microplastic pollution in typical farmland soils of suburb land. It may provide significant basis for subsequent research about microplastics contaminant in the terrestrial ecosystem.
Mingan Shao - One of the best experts on this subject based on the ideXlab platform.
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synchronous sequestration of organic carbon and nitrogen in mineral soils after conversion agricultural land to forest
Agriculture Ecosystems & Environment, 2020Co-Authors: Yan Zhang, Mingan Shao, Xiaolin Liao, Zhao WangAbstract:Abstract Agricultural land-use change is a global issue with significant implications for global warming and ecosystem functionality. Uncertainty regarding carbon (C) and nitrogen (N) sequestration and their dynamics after land-use change hampers an accurate understanding of the C and N cycles. To address the influence of converting agricultural land to forest on organic carbon (OC) and N sequestration and their coupling relationships, we collected topsoil (0−10 cm depth) and subsurface soil (10−20 cm depth) in afforested woodlands 10, 20, and 35 yrs after the establishment of Robinia pseudoacacia in abandoned Farmlands on the Loess Plateau, China. We analyzed the concentrations and stocks of OC and N in bulk soils and water-stable aggregates. We found that afforestation of farmland resulted in a relative increase of 30 % in the proportion of macroaggregates (8 – 0.25 mm) but a relative decrease of 45 % and 30 % in the proportions of microaggregates (0.25 - 0.053 mm) and silt + clay (
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spatial distributions of soil surface layer saturated hydraulic conductivity and controlling factors on dam Farmlands
Water Resources Management, 2010Co-Authors: Peipei Zhao, Mingan Shao, Tiejun WangAbstract:Saturated hydraulic conductivity (Ks) is a critical soil property affecting water flow and solute transport. In the Loess Plateau of China, sloping Farmlands have been increasingly replaced by dam Farmlands to achieve higher crop yields and more importantly to control soil erosions. It is necessary to understand the spatial pattern of near-surface KS on those newly formed dam Farmlands, because the land surface processes (e.g., erosion that is controlled by overland flow) are largely determined by the spatial distribution of near-surface Ks. In this study, near-surface Ks (e.g., 5 cm depth of the surface layers) was measured using 336 undisturbed soil samples collected from two dam Farmlands located in the Liudaogou catchment, a heavily studied catchment in the Loess Plateau of China. Based on classical and geostatistical analyses, the soil properties at the filled dam farmland showed more spatial variations compared to the silting dam farmland. Statistical scale-invariance was evaluated using the Hurst scaling parameter (H) for different soil parameters. The H values ranged from 0.646 to 0.877, indicating certain degrees of statistical scale-invariance and long-range dependency within the spatial range. The bulk density (Db), saturated water content (SW), sand content (SA), silt content (SI), and clay content (CL) were shown to affect the KS values significantly with SW, SI, and CL negatively and SA and Db positively correlated with KS. The highest KS value was found at the middle portion of the dam Farmlands and the lowest value was found at the locations with the minimum occurrence of surface runoff. In addition, the areas with lowest KS values corresponded to the areas with the highest CL, SI, and SW. The results showed that disturbing soil structure by planting crops would benefit the floodwater control on dam Farmlands due to increased Ks and the flooding on dam Farmlands would be eased due to the silting process.
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soil water distribution and movement in layered soils of a dam farmland
Water Resources Management, 2010Co-Authors: Peipei Zhao, Mingan Shao, Ahmed MelegyAbstract:In soil profiles, special emphasis has been placed on the migration of agricultural chemicals spread intentionally or accidentally into deep soils or groundwater body. To prevent soil water pollution and estimate the magnitude of the hazard caused by these chemicals, it is necessary to know the processes controlling their movement from the soil surface, through the root zone and eventually to the water table. This paper deals with two-dimensional soil water distribution and movement in sloping layered soils of a dam farmland on the Loess Plateau of China. In the dam farmland, soil water content showed horizontal distribution corresponding to spatial patterns of the particle sizes. The soil water content of deeper soil was relatively stable compared with topsoil. Generally, rainfall infiltration was limited to 0.8 m in the study period. Funnel flows were found in the layered soils of the dam farmland after rainfall proving the existence of this phenomenon which was observed in simulation experiments and field observation by previous researches. In the study area, the wetting front was unstable due to the layered soils. The spatial correlation analysis of the soil water content showed water movement along the layers in the wetting process with 7 m day − 1 only on the first day after rainfall. On the vertical direction, the velocity of water movement was 0.3 m day − 1 on the first day after rainfall. The results indicated that the quantity of funnel flow increases with distance along the inclined interfaces in the dam farmland which can cause contamination of groundwater. Consequently, future studies should consider the funnel flow and the management of agriculture chemicals in dam Farmlands. Copyright Springer Science+Business Media B.V. 2010
