大豆多生长中心作物的表征和荚粒产量分层规律

论述了大豆多生长中心作物的表征和荚粒发育及其在群体冠层中分层构成产量的一般规律。大豆植株结荚数量以上、中层为多，而粒重的分层比例是中层略大于上层。不同粒荚的分层分布，以三粒荚所占产量的比重最大（占42.78%)，而且大多数分布在植株的中、上层；其次是二粒荚（占25.73%)，主要分布在上、中层。研究认为，组成大豆群体产量的主体在植株中、上层，并以上层的二粒荚的粒数和中层的三粒荚的荚重构成产量为主。

Apparent Features of Multi-Growth Center Crop and Law of Pods-Grain Yield Separated Layer on Soybean

This paper deals with crop's apparent features of multi growth center,and the basic law of pods grain development in different layers of soybean canopy. The results showed that pods concentrated on upper and middle layers in the plant canopy with the percentage of 56.32% and 35.30% respectively. The distribution of pod weight in canopy was different to that of pod amounts, i.e. pod weight of the middle layer wasa little more than that of the upper layer.3 seeds pod owned the greatest proportion in the yiled(42.78%), and distributed mainly in middle and upper layer, it's 45.03% and 44.91% of total pods respectively. 2 seeds pod held 25.73% of total yield, and distributed mainly in upper and middle layer. Therefore, we can concluded that the main part of soybean yield consists of the middle and upper layer pod, the quantity of 2 seeds pod at the upper layer and the weight of 3 seeds pod in the middle layer are most important to the yield.