中文摘要：

选用抗旱性品种抗线7号、黑农65、绥农15为试材，利用全生育期大豆相对化LAI动态模型归一法，分析大豆抗旱品种“三合结构”定量方程及参数间函数关系。结果表明：3个品种相对LAI动态定量方程均符合y=（a＋bx）／（1＋cx＋dx^2），同一品种动态模型、光合参数及产量构成参数变化趋势年际间相同，而同一年内不同品种问各参数差异达极显著水平；高产品种具有较高的单株粒数和平均净同化率；3个抗旱品种产量与平均作物生长率、收获指数、平均净同化率、单位面积粒数、单株粒数和单株粒重均呈正相关，且产量主要决定于前两个因素。因此，通过改变外界栽培条件，提高群体平均生长率和单位面积粒数，保证群体具有较高收获指数，可最终实现大豆高产。

英文摘要：

The high-yield pathway has been put forward for grain crops such as maize（Zea mays L. ） ,rice（ Oryza sativa L. ） and wheat（ Triticun aestivum L. ）with the concept of ＇three combination structure quantitative expression＇. In this paper,we analyzed the quantitative equation and relationship between its parameters ＇ three combination structures＇ using the normalized dynamic models of relative LAI ,with three drought resistant variety Kangxian 7, Heinong 65 and Suinong 15 as materials. The relative LAI dynamic quantitative equation were all accorded with y = （ a ＋ bx）/（ 1 ＋ cx ＋ dx2 ） in three varieties. The dynamic models, photosynthetic and yield component parameters had the same tendency in different years in the same variety, while var- ied significantly among varietis. High-yield varieties had higher seed No. per plant （ SN ） and mean net assimilation rate （MNAR）. Seed yield positively correlated with mean crop growth rate （MCGR）, harvest index（ HI）, MNAR, total seed number per m2（ TSN）, SN and seed weight per plant, especially for MCGR and HI. Hence, it is possible to enhance soybean yield by increasing mean crop growth rate and harvest index.