摘要
采用３因素５水平二次回归旋转设计，对杂交中稻旱育稀植的高产配套栽培技术进行了研究，利用微机配置出农艺措施效应的数学模型，并寻配出优化的农艺方案。
The effects of three factors of planting density, percentage of nitrogen fertilizers applied at tillering stage, number of tillers at the time of field drying on grain yield in dryland seedling raising and sparse transplanting culture of mdeium hybrid rice were studied by quadratic rotory regression design of 3 factors and 5 levels. The mathematical model of the effects of agronomic measures on grain yield was established and the optimized indices of the agronomic practices were found to be: ① to obtain a yield of 9.75 t/hm 2 or higher, the planting density should be at 298 500～324 300 hills/hm 2, the percentage of nitrogen fertilizers applied at tillering stage at 8.07%～13.77%, the number of tillers at field drying at 2 496 400 ～ 2 843 400 /hm 2; and ② to obtain a yield of 10.50 t/hm 2 or higher, the planting density should be at 294 500 ～330 100 hills/hm 2, the percentage of nitrogen fertilizer applied at tillering stage at 4.51%～10.44% and the number of tillers at field drying at 2 244 700～2 519 400/hm 2.
出处
《杂交水稻》
CSCD
北大核心
1997年第6期15-17,共3页
Hybrid Rice
关键词
杂交中稻
旱育稀植
家艺措施
指标
数学模型
medium hybrid rice
dryland seedling raising and sparse transplanting culture
agronomic measure
mathematical model
optimized indices
