稻田肥水管理对氮肥效益的影响

Effect of Fertilizer and Water Managementon Nitrogen Efflciency in Pddy Field

本文在阐明水稻氮需求、氮效应、稻田氮肥施用技术,及水分管理对氮肥效应的影响的基础上,提出了水稻氮肥施用应在适宜氮肥施用量的范围内,采取控前攻中施肥法,与水分管理结合,以水带肥,提高稻田氮肥效益。

The effect of N requirement, N response of rice, N—fertilizer application and water management in paddy field on the efficiency of N—fertilizer was elucidated. The optimum amount of N—fertlizer applied was important. Reducing the N—fertilizer application rate at early stage, increasing the rate at middle stage of rice growth (panicle initiation), combining with water and fertilizer management, and making water take fertilizer into soil must be adopted to increase the N—fertilizer efficiency in paddy field.