大豆干物质积累分配与产量的关系研究

Relationship Between Dry Matter Accumulation Distribution and Yield of Soybean

为揭示攸县大豆植株干物质积累分配与产量的关系,研究了干物质积累动态、分配规律、各生育期生长曲线特征参数对产量的影响。结果表明,植株营养器官干物质积累量及分配比例随生育期的推进表现出先增后降的趋势,并在始粒期(R5)达到最大值,而干物质积累总量不断增加,干物质最大生长速率出现的时间在盛花期(R2)至始粒期(R5)期间,且干物质积累最大生长速率的出现时间(Tm)及各阶段的速率大小(V)对大豆产量的形成具有重大作用。

In order to reveal the relationship between dry matter accumulation distribution and yield of soybean plants in Youxian County,the effects of dry matter accumulation dynamics,distribution rule and characteristic parameters of different growth stages on yield were studied. The results showed that the accumulation and distribution of dry matter in vegetative organs presented a trend of first increasing and then decreasing with the advance of growth period,and reached the maximum value at the beginning of grain stage(R5),while the total amount of dry matter accumulation increased continuously. The maximum growth rate of dry matter appeared during the period from the flowering stage(R2) to the initial grain stage(R5).Moreover,the emergence time of the maximum growth rate of dry matter accumulation(Tm) and the dry matter accumulation rate of each stage(V) played an important role in yield formation of soybean.