水稻施用氮磷钾的配合比例,是水稻丰产上一个十分重要的问题。在正确贯彻各项栽培措施的情况下,氮磷钾配合得当,多施肥就能多增产,配合不当,多施肥未必能多增产,有的甚至减产。怎样的比例才算得当?各地的情况不一 The proportion of N, P and K fertilizers applied to rice is a very important issue for the high yield of rice. In the proper implementation of various cultivation measures, N, P and K are well coordinated, more fertilization can increase yield, with improper, more fertilization may not be able to increase production, and some even reduce production. What kind of proportion is considered proper?