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[1]CHEN Chunliang,BAO Kaiqiang,WANG Mengying,et al.Effects of Vegetation Removal on Soil Organic Matter and Nutrients in an Erosive Environment[J].Research of Soil and Water Conservation,2022,29(05):131-136.

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Effects of Vegetation Removal on Soil Organic Matter and Nutrients in an Erosive Environment

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 131-136 Column: Public date: 2022-08-20

Title:: Effects of Vegetation Removal on Soil Organic Matter and Nutrients in an Erosive Environment

Author(s):: CHEN Chunliang^1,2, BAO Kaiqiang³, WANG Mengying^1,2, ZHENG Ke^1,2, QIU Liping², WEI Xiaorong²; (1.College of Natural Resources and Environment, Northwest A&F University, Yangling,Shaanxi 712100, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling,Shaanxi 712100, China; 3.Hancheng Agricultural Technology Extension Center, Hancheng,Shaanxi 715400, China)

Keywords:: soil erosion; landform conditions; vegetation removal; water-wind erosion crisscross region

CLC:: S157.1

DOI:: -

Abstract:: To explore the effects of vegetation on soil properties under erosion environment, we selected three sub-watersheds to conduct a vegetation removal experiment for two years in northern Shaanxi of the Loess Plateau. Soil organic matter and nutrients in the eroding and corresponding deposition sites in plots with and without vegetation were analyzed. The results showed that:(1)soil erosion and deposition significantly affected soil organic matter and nutrient contents.; compared with the erosion sites, soil nitrate, ammonium, total phosphorus and available potassium in the 0—20 cm depth in the deposition sites increased by 75.3%, 25.1%, 11.8% and 27.0%, respectively;(2)the effects of vegetation varied significantly between eroding and deposition sites; after two years vegetation removal, contents of soil organic matter, ammonium and available potassium in the 0—10 cm depth decreased by 1.75 g/kg, 0.97 mg/kg and 35.85 mg/kg in the eroding sites, and decreased by 7.61 g/kg, 1.47 mg/kg and 90.74 mg/kg in the deposition sites, respectively; soil nitrate increased by 0.60 mg/kg and 2.33 mg/kg in the eroding and deposition sites, respectively;(3)after two years experiment, we had observed the significant correlations among changes of soil nutrients in the deposition sites, but a relatively weaker correlations in the eroding sites. These results showed that vegetation removal had greater effects on soil organic matter and available potassium in the deposition sites, and greater effects on nitrogen and ammonium in the eroding sites. These results can enhance the understanding regarding to soil and vegetation interaction in the erosive environments, and provide a scientific basis for the improvement of soil quality in soil and water loss areas.

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Last Update: 2022-08-20