中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Simulation and 137Cs tracer show tillage erosion translocating soil organic carbon, phosphorus, and potassium

文献类型:期刊论文

作者Zhang JH(张建辉); Fan HZ; Su ZA(苏正安)
刊名Journal of Plant Nutrition and Soil Science
出版日期2013
卷号176期号:5页码:647-654
关键词tillage erosion spatial variability soil redistribution vertical mixture boundary effect
通讯作者Zhang JH
中文摘要


英文摘要

Research on how tillage-induced soil redistribution affects soil properties is limited for complex slopes in nonmechanized agricultural areas. The objectives of this study are (1) to examine the vertical redistribution of soil organic C (SOC), extractable P and K induced by tillage on a complex slope, (2) to assess the effects of tillage erosion on soil profile properties, and (3) to elucidate the variations in soil properties induced by both vertical mixture and downslope transport of soil within the landscape. Simulated tillage was conducted in the Yangtze Three Gorges Reservoir Area, China. The 137Cs data showed that intense tillage caused the soil vertical mixture and downslope transport. The redistribution of 137Cs and soil constituents varied with the number of tillage passes and location in relation to curvature. SOC was completely depleted with the disappearance of soil profiles at the summit position, while SOC concentrations decreased by 26% for the till layer and increased by 29% for the sublayer at the toeslope position for the 15-tillage operation, as compared with those of pretillage. The vertical redistribution of extractable P and K followed a similar pattern to that of SOC. The gap and variation in soil constituents between the till layer and sublayer declined after tillage, suggesting that the mixing effect of tillage attenuates the variability of soil properties in the vertical direction. Net loss and gain of soil constituents occurred at the summit and toeslope positions, respectively, suggesting that the downslope transport of soil induced by tillage accentuates the variability of soil properties in the lateral direction.

收录类别SCI
语种英语
公开日期2013-12-18
源URL[http://ir.imde.ac.cn/handle/131551/6635]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
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GB/T 7714
Zhang JH,Fan HZ,Su ZA. Simulation and 137Cs tracer show tillage erosion translocating soil organic carbon, phosphorus, and potassium[J]. Journal of Plant Nutrition and Soil Science,2013,176(5):647-654.
APA Zhang JH,Fan HZ,&Su ZA.(2013).Simulation and 137Cs tracer show tillage erosion translocating soil organic carbon, phosphorus, and potassium.Journal of Plant Nutrition and Soil Science,176(5),647-654.
MLA Zhang JH,et al."Simulation and 137Cs tracer show tillage erosion translocating soil organic carbon, phosphorus, and potassium".Journal of Plant Nutrition and Soil Science 176.5(2013):647-654.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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