摘要
采用迟熟中粳稻品种和杂交中籼稻汕优组合 ,进行穗肥施用时期试验。结果表明 :合理施用穗肥 ,利于控制抽穗期群体干物质适宜值、提高抽穗至成熟期的干物质生产量 ,利于提高有效、高效叶面积率 ,增加根系活力 ,提高颖花根活量 ,最终提高结实率和实粒数 ,获得高产。在当前推广品种中 ,在取得适宜穗数条件下 ,迟熟中粳稻在倒 3叶 1次施肥或倒 4倒 3叶分次施肥 ,确保提高群体质量而获得高产。
Experiment was conducted with materials of the middle round grain Japonica rice and middle season hybrid Indica rice. A experiment of application stage of panicle fertilizer was made. Results were as follows: Reasonable fertilizer stage can control the optical population accumulation of dry matter at heading stage, increase the dry matter production from heading to maturing stage and the effective and high effective ratio of leaf area, enhance the activity of root, increase the spikelet root activity at maturing stage, resulting in high filled percentage, filled grain numbers and high grain yield. In current application breeds, after suitable numbers of ears, panicle fertilizer should be applied one time from 3rd to flag leaf, or twice from 4th and 3rd to flag leaf for the middle round grain rice, thus can ensure high population quality and high grain yield.
关键词
水稻
穗肥施用期
群体质量
根系活力
产量
rice
panicle fertilizer stage
population of quality
activity of root
yield
