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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Effects of different soil management practices on total P and Olsen-P sediment loss: A field rainfall simulation study
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Effects of different soil management practices on total P and Olsen-P sediment loss: A field rainfall simulation study

机译：不同土壤管理措施对全磷和Olsen-P沉积物流失的影响：田间降雨模拟研究

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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.
机译：在2002年和2005年进行了田间降雨模拟，研究了不同土壤管理措施对洛阳15 m长边坡土壤侵蚀和再分配的总磷（TP）和Olsen-P损失的影响。中国河南省。田间田地于2001年建立，包括以下土壤管理措施：覆盖覆盖深耕（SSM），覆盖覆盖免耕（NTM），减耕（RT）和常规耕作控制（CT）。结果表明，统一耕作6年后，不同样地间底泥负荷中TP和Olsen-P含量无显着差异。 TP和Olsen-P在下坡的富集表现出沿坡的明显重新分布。耕作方式对TP和Olsen-P富集率（ER）时间格局的影响不均匀。 ERTP值最初很高，短时间后减小，直到CT和RT图中的降雨测试结束，但仍保持> =1。降雨模拟结束时Olsen-P的ER显示出显着差异与初始阶段相比，分别为0.78至1.60。然而。 TP和Olsen-P的时间损失率显示出相似的模式，因为它更多地取决于沉积物损失率，而不是取决于沉积物中的浓度。与2002年的CT相比，SSM的TP和Olsen-P侵蚀损失减少了96％。此外，在连续4年的实践中，SSM的TP和Olsen-P损失减少幅度最大。尽管径流减少并不显着，但RT可使TP和Olsen-P损失降低了30％。考虑到TP和Olsen-P的运营成本较低，NTM是最好的选择。

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