西南暖地向けのダイズ新品種サチユタカの乾物生産特性

日本作物学会紀事

馬場 彰子¹  古屋 忠彦¹  井上 眞理¹  松永 亮一²  鄭 紹輝¹  福山 正隆¹ 

[1] 九州大学;九州沖縄農業研究センター

关键词: Dry matter production;    乾物生産;    Crop growth rate;    個体群成長速度;    Retranslocation;    再転流;    Soybean;    ダイズ;    Nonstructural carbohydrate;    非構造性炭水化物;   

DOI  :  10.1626/jcs.72.384

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The purpose of this study was to determime the characteristics of dry matter production in Sachiyutaka, a new soybean cultivar in southwestern Japan in comparison with Fukuyutaka, a conventional cultivar in the region. Soybean plants were grown in the field in 2001 and 2002. The flowering time and the maturation time were earlier and vegetative growth was poorer in Sachiyutaka than in Fukuyutaka, but the ratio of grain to stem was clearly higher in Sachiyutaka, and there were no significant differences in seed yield between the two cultivars. Growth parameters such as leaf area index (LAI), crop growth rate (CGR), total dry matter and stem dry weight were slightly higher in Sachiyutaka until flowering, but the increase in those parameters after flowering were more rapid in Fukuyutaka. No differences in photosynthetic rate, net assimilation rate (NAR) or pod growth rate were observed between the two cultivars, though the beginning of pod growth was earlier in Sachiyutaka. The stem dry weight and the concentration of total nonstructural carbohydrate in the stem decreased after flowering in both cultivars, but the degree of the decline was larger in Sachiyutaka than in Fukuyutaka. Those results suggested that the carbohydrate stored in the stem was translocated to developing fruit more in Sachiyutaka than in Fukuyutaka. In conclusion, high seed yield in spite of low total dry weight in Sachiyutaka is caused by the early completion of vegetative growth and the retranslocation of stored nonstructural carbohydrate from stems to fruits during pod filling period.

【 授权许可】

Unknown