数字农科院2.0

Effects of different soil management practices on total P and Olsen-P sediment loss: A field rainfall simulation study

文献类型： 外文期刊

作者： Jin, K.;Cai, D. X.;Jin, J. Y.;Jin, K.;Cai, D. X.;Jin, J. Y.;Jin, K.;Cornelis, W. M.;Schiettecatte, W.;De Neve, S.;Hartmann, R.;Gabriels, D.;Lu, J. J.

作者机构：

关键词： conservation tillage;soil management practice;soil erosion redistribution

期刊名称： CATENA

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年卷期：

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收录情况： SCI

摘要： Field rainfall simulations were conducted in 2002 and 2005 to study the effects of different soil management practices on the total phosphorous (TP) and Olsen-P losses by soil erosion and redistribution along a 15 m long slope in Luoyang. Henan province, China. Field plots were set up in 2001 and included the following soil management practices: subsoiling with mulch (SSM), no-till with mulch (NTM), reduced tillage (RT), and a conventional tillage control (CT). The results showed that there were no significant differences in TP and Olsen-P content in the sediment load between different plots after 6 years uniform tillage practices. The enrichment of TP and Olsen-P at the lower slope showed a clear redistribution along the slope. Effects of tillage practices on the temporal pattern of the enrichment ratio (ER) of TP and Olsen-P was not uniform. ERTP values were initially high and diminished after a short period of time and leveled to the end of the rainfall test in CT and RT plots, but remained >= 1. The ER of Olsen-P at the end of rainfall simulation showed a significant difference when compared to the initial stage, 0.78 to 1.60, respectively. However. the temporal loss rate of TP and Olsen-P showed a similar pattern because it was more depending on the sediment loss rate than on the concentration in the sediment. SSM resulted in 96% less TP and Olsen-P erosion loss compared to CT in 2002. Also, SSM showed the highest reduction in TP and Olsen-P loss after 4 years consistent practice. RT reduced TP and Olsen-P loss by 30%, although the runoff reduction was not significant. NTM was the best alternative with respect to TP and Olsen-P conservation, when considering its lower operational costs.

分类号： S15

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