Influence of Planting Density to Podding of Soybean Plants with Special Reference to Raceme Order

Japanese Journal of Crop Science

Toshiro KURODA¹  Kenji KOHRI¹  Seiichi KUMANO¹ 

关键词: Flowering;    開花;    Planting density;    花房次位;    Podding;    結莢率;    Podding efficiency;    栽植密度;    Raceme order;    莢数;    Soybean;    ダイズ;   

DOI  :  10.1626/jcs.61.426

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To clarify the influence of planting density on podding of soybeans, field experiment was conducted in terms of the identification of the raceme order (RO). Soybean cultivars 'Tatisuzunari' and 'Tamahomare' were grown at three planting densities (6.25, 12.5, 25.0 plants/m2) for the investigation of flowering and podding. The flowering of raceme started orderly from lower ROs including zero-and 1st-order, and then extended toward higher ROs without showing the density and cultivar effects. The total amount of flowers per plant was reduced in higher density, especially on account of higher ROs. It was shown that podding efficiency of 'Tamahomare' rose in higher density by the contribution of lower ROs. On the other hand, 'Tatisuzunari' showed slight decreace of the efficiency in higher density, which was derived from the unstability on higher ROs. The reduction of total amount of ripened pods per plant was severe in higher density, but the number in lower ROs was less decreased. Pods per unit area increased in higher density owing to increasing pods in lower ROs. It was suggested that the increasing yield of soybean in higher density relates to the spreading of the share of pods on main stems together with that of lower ROs.

【 授权许可】

Unknown