大豆粒、荚物质积累分配规律研究

Study on Regulation of Accumulation and Distribution of Seed and Pod of Soybean

在田间条件下，对粒重不同大豆材料的籽粒物质积累动态研究结果表明：中小粒材料鼓粒速率呈慢-快-慢的单峰曲线，鼓粒速率峰值（5-8mg／d）出现在始粒期后20d左右，大粒材料鼓粒速率呈双峰曲线，峰值分别出现在始粒期后12，24d左右，并且第二个峰值（20-27mg／d）明显高于第一个峰值（12-18mg／d）。大粒材料的鼓粒速率明显大于小粒材料。大粒材料在籽粒鼓粒期间子粒有较低还原糖含量和较高的淀粉含量，在鼓粒前期大粒材料荚壳中淀粉含量明显高于中小粒材料。

In the field conditions, dynamic analysis on the weight of the different soybean seed materials accumulation shows that the pod-filling velocity of middle-little seed materials took on a peak curved line of slow-quick-slow, peak value （5-8 mg/d. seed） appeared about 20 d at R5, the pod-filling speed of big seed materials took on couple peak curved line, peak value appeared about 12, 24 d after R5,moreover the second peak value （20-27 mg/d. seed） was obviously higher than the first one （12-18 mg/d. seed）. The pod-filling speed of big seed materials was visibly greater than that of middle-little material. Big seed materials have lower reducing sugar content and higher starch content at pod-filling stage, starchy content of big seed materials was obviously higher than that of middle-little seed in pod at R5.