【摘要】 通过建立5个不同种植模式的径流小区,对每个小区径流泥沙中养分的含量进行研究,探讨机械组成、微团聚体含量、粘粒团聚度等因子对养分流失影响的程度,结果发现:1530 cm土层中<0.01 mm的粘粒含量与径流泥沙中全钾含量和速效钾含量有显著的相关性。015 cm层中的<0.01 mm和<0.001 mm微团聚体含量都与径流泥沙中有机质、速效钾和全氮的含量有显著的相关性。同层中<0.01 mm粘粒团聚度与径流泥沙中全氮含量和速效钾含量有显著的相关性,而同层<0.001 mm粘粒团聚度与径流泥沙中全磷含量、速效钾含量和速效磷含量有显著的正相关。更多还原

【Abstract】 Five runoff plots,which different land use patterns was built.Studying the influnces of various factors on nutrients losses.The result of the content of <0.01mm granule in 0~15 cm soil layer has observable correlation to the content of total K and Olsen-K in runoff mud and sand;The content of <0.01 mm and <0.001 mm micro aggregates in 0~15 cm soil layer has observable correlation to the content of organism,Olsen-K and total N;The degree of <0.01 mm granule reunite in the same layer has observable correlation to the content of total N and Olsen-K,and the degree of <0.001 mm granule reunite has observable correlation to the content of total P,Olsen-p and Olsen-K.更多还原