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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。
Through field experiments, the black soil layer was artificially stripped, and the effects of different soil and water erosion intensity on dry matter accumulation and yield of soybean were simulated. The results showed that the loss of topsoil of 10 cm on 6 degree sloping land with 30 cm black soil had no obvious effect on the dry matter accumulation of soybean. However, when the loss of black soil exceeded 10 cm, the dry matter accumulation of soybean decreased with the increase of loss. Black soil loss of 5cm and 10cm did not significantly affect the yield of soybean, only decreased by 3.1% and 3.2% respectively; when the loss of 20cm, the yield of soybean decreased by 33.2%; the yield decreased by 59.2% after all the loss of black soil, ie 30cm, Soil and water loss in black soil is extremely harmful to soybean production. The experiment also showed that the application of organic fertilizer can be appropriate to reduce the impact of soil erosion on soybean yield.