IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Simulation and 137Cs tracer show tillage erosion translocating soil organic carbon, phosphorus, and potassium
Li FC(李富程); Zhang JH(张建辉); Su ZA(苏正安); Fan HZ
Corresponding AuthorZhang JH
2013
Source PublicationJournal of Plant Nutrition and Soil Science
Volume176Issue:5Pages:647-654
Abstract


;

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.

KeywordTillage Erosion Spatial Variability Soil Redistribution Vertical Mixture Boundary Effect
DOI10.1002/jpln.201200341
Indexed BySCI
Language英语
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6635
Collection山地表生过程与生态调控重点实验室
山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
Li FC,Zhang JH,Su ZA,et al. 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 Li FC,Zhang JH,Su ZA,&Fan HZ.(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 Li FC,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.
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