Growth Pattern and Radiation Interception of Indeterminate Early Soybean Cultivars under High Planting Population

Japanese Journal of Crop Science

Akihiro ISODA¹  Hiroshi NOJIMA¹  Yasuo TAKASAKI¹ 

关键词: Canopy structure;    小葉面積;    High planting population;    受光量;    Indeterminate stem habit;    ダイズ;    Leaflet area;    密植;    Radiation interception;    無限伸育型;    Soybean;    葉群構造;   

DOI  :  10.1626/jcs.65.599

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Two indeterminate early soybean cultivars, Tsurukogane and Huangbaozhu (Ib); and a comparative cultivar, Tachinagaha (IIc, determinate) were grown under two high planting populations (equidistant spacings of 20cm and 30cm) in the experimental field of the Faculty on Horticulture, Chiba University. The adaptability under high planting populations was examined in terms of growth pattern, canopy structure and radiation interception. The rate of increase of the leaf area indices in Tsurukogane and Huangbaozhu were slightly greater than that of Tachinagaha, though there was no significant difference. There was no increase in leaf and stem dry weight in Tsurukogane and Huangbaozhu in the 20cm plot by the end of August. Tachinagaha showed increased dry weight till the middle of September. Plant height of Tachinagaha was higher in the 20cm plot (100cm). Tsurukogane and Huangbaozhu were stunted to about 70cm in both plots. The leaflet area of Tachinagaha increased towards the stem terminal. In Tsurukogane and Huangbaozhu, leaflet areas at the upper nodes were small. In the 20cm plot, Huangbaozhu had smaller leaflets compared to those of the 30cm plot. Though there was no significant difference in intercepted radiation per unit leaf area among the three cultivars in the 30cm plot, Huangbaozhu had significantly greater values and Tachinagaha had smaller values in the 20cm plot. The two indeterminate early cultivars thus showed excellent characteristics in radiation interception.

【 授权许可】

Unknown