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比较研究了大豆三种不同结荚习性品种（系）的荚粒形成。无限性的沈农９２－１６和亚有限性的沈豆４号均以主茎结荚为主，全株着荚率分别为２３．２６％和２７．７５％，有限性的沈农９１－４４主茎和分枝结荚数量相近，全株着荚率为４３．５０％。粒重增长可用Ｌｏｇｉｓｔｉｃ方程表达。同一植株前、中、后期和上、中、下段所形成的籽粒，其增重有快慢之别。一般前期和下段所形成的籽粒增重较慢，反之则否。无限性的沈农９２－１６籽粒不整齐。
The pod grain formation of three different pod habit varieties (lines) of soybean was comparatively studied. Unlimited Shennong 92-16 and sub-limited Shennong 4 are dominated by the main stem pod, the pod rates of the whole plant were 23.26% and 27.75% respectively, and the limited Shennong 91- 44 The number of main stems and branches pod was similar, the whole plant pod rate was 43.50%. The growth of grain weight can be expressed by Logistic equation. The same plant before, during and after and in the upper, middle and lower segments of the formation of the grain, its weight gain is the difference between the speed. Generally pre-and lower segments of the grain weight gain slower, and vice versa is not. Unlimited Shennong 92-16 irregular grain.