【摘要】 通过田间试验,进行人为剥离黑土层,模拟研究了不同水土流失强度对大豆干物质积累及产量的影响。研究结果表明,在拥有30cm黑土层的6度坡耕地上,表土流失掉10cm对大豆干物质积累没有明显影响。然而当黑土层流失超过10cm,大豆干物质积累量随流失的增加而减少。黑土层流失5cm、10cm后,未对大豆产量造成显著影响,仅分别降低3.1%和3.2%;流失20cm,大豆产量下降了33.2%;黑土层全部流失即30cm后,产量下降了59.2%,表明黑土水土流失对大豆生产危害极其严重。试验也表明施用有机肥可适当减轻水土流失对大豆产量的影响。更多还原

【Abstract】 Present studies investigated the effects of artificial topsoil removal on soybean dry matter accumulation and yield in a black soil field with 6°slope and 30 cm topsoil layer.Dry matter accumulation was not affected when 10 cm topsoil was removed,and significant reduction was observed while topsoil removal exceeded 10 cm.Seed yield was only reduced at 3.1 % and 3.2 % by 5 cm and 10 cm removal,respectively,while 33.2% and 59.2% reduction was observed in 20 cm and 30 cm removal treatment.It indicated that soil erosion will result in a serious yield reduction in soybean,and manure application could alleviate the yield loss.更多还原