Flowering Habit and Yield of Soybean

为了阐明确定型和不确定型大豆不同总状目在开花习性、产量及产量构成方面的差异，以确定型和不确定型大豆品种“Tatisuzunari”和“Touzan 69”为研究对象。虽然有类似的开花习性。两种类型均观察到由低到高的植株位置，但在主茎上低阶总状花序的生长速度（1.4株/d）比头山69（0.8株/d）要快得多。在tatisuzunari中，当一级完成开花后，高级开始开花，但在Touzan 69中，一级在较高的植物位置上继续开花，在此期间，高级总状花序开始开花，提供了产生更多No的机会。的花朵。在Tatisuzunari中，随着总状花序阶数的增加，花的脱落量增加，而在Touzan 69中，花的脱落量最大的是一级和二级总状花序。与头山69相比，头山69在各总状目上的荚果结实率更高。在Tatisuzunari 100中，除了复叶的次总状花序增加很少外，种子重量几乎保持不变，但在Touzan 69中，种子重量随总状花序阶数的增加而减少。复叶次生总状花序对总No的测定起关键作用。植物，没有。花、荚果结实率；与头山69相比，Tatisuzunari的荚果/株数和种子重量分别为100和100。与Tatisuzunari相比，Touzan 69的产量贡献是有限的。头山69的叶长从低到高急剧减少，有利于冠层生长的均匀光分配，而盘津利的叶长从低到高逐渐增加。

In order to elucidate the differences of flowering habit and yield and yield components according to different raceme orders between determinate and indeterminate types of soybean, cultivars Tatisuzunari (determinate) and Touzan 69 (indeterminate) were used. Although similar trend of flowering habit ie.progression from low to upper plant positions was observed in both types, but the speed of low order raceme on main stem was much more (1.4 phytomers/day) in Tatisuzunari as compared to Touzan 69 (0.8 phytomers/day). In tatisuzunari when 1st order finished to flowering then higher order begins to flowering, but in Touzan 69 1st order on higher plant positions continue to flowering and during this period higher order racemes begin to flowering providing the opportunity to produce more No.of flowers. In Tatisuzunari flower shedding increases with the increase of raceme order but in Touzan 69 maximum shedding is on the 1st and 2nd order racemes. Pod setting ratio in Tatisuzunari on every raceme order is more as compared to Touzan 69. In Tatisuzunari 100 seed weight remains almost constant except very little increase in the secondary raceme with compound leaf, but in Touzan 69 it decreases with the increase of raceme order. Sccondary raceme with compound leaf plays a pivotal role for the determination of total No.of phytomers, No.of flowers, pod setting ratio, No.of pods/plant and 100 seed weight in the Tatisuzunari as compared to Touzan 69. Yield contributing recemes are limited in Touzan 69 as compared to Tatisuzunari. In Touzan 69 leaf length decreases drastically from low position to higher position favoring the even ditribution of light for canopy growth, whereas in Tatisuzunari there is increase in the leaf length from lower to higher positions.