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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，在开花盛期达到最高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，单株结荚３０ 个左右，每荚粒数以２．２ 为宜，百粒重２２ｇ 以上。相应栽培模式是：６ 月上中旬适时早播，密度每亩１．７５ 万，初花期追尿素４ｋｇ／亩，后期根外追肥防早衰，提高百粒重。
The hybrid design was used to study the yield structure, leaf area coefficient and dry matter accumulation and distribution of Huaidou No.4 under different sowing dates, planting densities and fertilization rates. The reasonable physiological indexes of 200kg / acre high yielding cultivation were explored: leaf area index The branching period (V8) was 2.0-2.1, reaching a peak of 4.1-5.0 in full flowering stage and then declined slowly and maintained at 3.5-4.2. The dry matter accumulation and distribution Should be more than the source foot library, branching 2.8 - 3.5, about 30 pods per plant, each pod grain number of 2.2 is appropriate, a hundred weight 22g or more. The corresponding cultivation mode is: timely sowing in mid-June in June, the density of 17,500 acres per acre, early flowering chase urea 4kg / mu, post-root top-dressing anti-premature aging, improve the weight of 100.