七十年代中期,我国继杂交籼稻之后育成杂交粳稻,为北方寒冷稻区杂交优势利用,提高单产开辟了新的增产前景。最近几年生产实践证明,杂交粳稻比常规品种“丰锦”增产10—20%。目前种植面积正在扩大中。水稻高产的形成是合理控制群体结构,协调个体与群体生长的发展过程。在其高产栽培体系中,施肥是调节水稻生育,创造高产结构的重要环节。为了解杂交粳稻营养生理特性及其要术采取的施肥 In the mid seventies, following the indica hybrid rice in China, japonica hybrid rice was bred to exploit the advantages of hybridization in the northern cold rice region and to open up new yield prospects. Production practice in recent years proved that the hybrid japonica rice yield increased by 10-20% over the conventional variety “Fengjin”. Currently planted area is expanding. The formation of high-yielding rice is to control the population structure and coordinate the development of individuals and groups. In its high-yielding cultivation system, fertilization is an important part of regulating rice growth and creating a high-yield structure. To understand the nutritional physiology of japonica hybrid rice and its fertilization technique