夏大豆淮豆4号高产栽培的生理基础

采用混杂设计研究淮豆４号在播期、密度、施肥三因素不同水平下,产量结构,叶面积系数天及干物质积累分配情况,探索出２００ｋｇ／亩以上高产栽培的合理生理指标：叶面积指数分枝期（Ｖ８）２．０～２．１在开花盛期达到提高４．１－５．０,然后缓慢下降,并维持在３．５－４．２之间,干物质积累与分配应是源多库足,分枝２．８－３．５个,单株结英３０个左右,每英粒数从２．２为宜,百粒重２２ｇ以上,相应栽培模式是：６月上

A STUDY OF PHYSIOLGICAL BASES SUMMER FOR HIGH-YIELD ON THE SOYBEAN VARIETY "HUAIDOU 4

Effect of compomnent of yield, LAI,dry matter weight, flower and pod weight on the soybean variety "Huaidou 4" were studied under different levels of sowing stage, density and fertilizer, The good physiological bases for high-yield type of "Huaidou 4" is that LAI lies at 2.0-2.1 at true leaf stage, and maxium LAI should become 4.1-5.0 at blooming stage, and maintain 3.5-4.2 at pod-filling stage. Dry matter accumulation and disstribution should have enough souce. Branches lie around 2.8-3.5, The number of pods per plant around 30, the seeds per pod is 2.2, and the weight of 100 seed is 22 gram. The cultivation mode for the good physiological bases is that soybean should be sowed in 1-15th of June, density is 175,000 plants per mu, amount of top dressing fertilizer in initial flowering stage is 4.0kg per mu, and foliage dressing would be applied at the pod filling stage if needed.