Abstract:

The loss of nitrogen and phosphorus in sloping land is an important resource of agricultural nonpoint pollution. The red soil slope in Xiangyin County, Hunan Province, which is the object of this research. Through setting a field experiment, we discussed the effect of eco-blocking technology on maize yield and NP loss. The results showed that, eco-blocking technology could effectively reduce the surface runoff and sediment loss. Compared with CK, runoff reduced 5.7%-17.1%, sediment loss decreased 40.1%-45.6%. The effect of nitrogen and phosphorus Intercepting was apparent. The runoff of TN and TP were estimated to be 26.5%-44.9% and 29.3%-33.1%, respectively. It also could increase corn yield and improve the NP fertilizer efficiency and utilization. Corn production increased by 4%-8.1% compared with CK.