双杂吨粮生理生态指标及栽培模式研究

本研究通过3年的调查与试验,阐明了不同生育期杂交稻组合在不同栽培季节,不同栽培水平下的产量形成特点及氮钾吸收特性,明确了杂交稻的穗型与生育期有一定的关系,对杂交稻需钾量是否近似常规稻这一理论问题也给予了肯定的证明.根据研究结果,提出了不同生育期杂交稻组合亩产吨粮的产量结构指标,氮钾吸收量指标及相应的生理生态指标,制订的“双季杂交水稻高产栽培模式”,实用性强,增产节支,为吨粮田的建设与推广提供了技术方案.

STUDIES ON THE PHYSIOLOGICAL AND ECOLOGICAL INDEXES OF ONE TON GRAIN YIELD AND CULTIVATION MODEL IN DOUBLE CROPPING HYBRID RICE

The characteristics of yield formation,nitrogen and potassium absorption of hybridrice combinations with different growth duration under different plantting seasons and dif-ferent amounts of fertilizer application are clarified.There is a clear relationship betweenthe panicle type and the growth duration in hybrid rice combinations.And it was provedthat the amount of potassium absorption of hybrid rice is nearly the same as that of thenormal rice.The indexes of yield,of amounts of nitrogen and potassium,and of physiologyand ecology of one ton grain in hybrid rice combination with different duration are putforward based on the research results.The cultivation model of double-cropping hybridrice is laid down,which is practical and provides a technical plan for the popularization of the techniques of one ton grain per mu.