暖地での狭畦密植栽培におけるダイズ品種サチユタカの乾物と子実生産の特徴

日本作物学会紀事

古畑 昌巳¹  山下 浩²  森田 弘彦³ 

[1] 中央農業総合研究センター北陸研究センター;九州沖縄農業研究センター;秋田県立大学生物資源科学部

关键词: Dry matter production;    乾物生産;    Narrow-row-dense-planting culture;    狭畦密植栽培;    Sachiyutaka;    サチユタカ;    Seed production;    子実生産;    Light-intercepting characteristics;    受光態勢;    Soybean;    ダイズ;   

DOI  :  10.1626/jcs.77.409

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Dry matter and seed productivity of Sachiyutaka, an early maturing soybean (Glycine max Merr.) cultivar with a short stem, were investigated under four kinds of interrow spacing (30, 40, 60 and 80 cm) compared with a cultivar, Fukuyutaka under 80 cm of interrow spacing as the conventional culture in south-western Japan. In Sachiyutaka, the numbers of pod and seed per square meter increased by narrow row spaceing of 30 and 40 cm, and consequently, the seed yield was increased by 30 g m-2 compared with Fukuyutaka under conventional culture. The leaf area index (LAI) at flowering time and that at the seed-filling stage greater under narrow-row-dense-planting culture in Sachiyutaka, were as large as 5.0—4.4, which were approximately equivalent to those in Fukuyutaka under conventional culture. In addition, the light extinction coefficient of 50-cm upper layer was low at the seed-filling stage in narrow-row-dense-planting culture, showing excellent light-intercepting characteristics. As a result, maintaining a sufficient level of LAI at the seed-filling stage under the narrow-row-dense-planting condition in Sachiyutaka was considered as a factor to obtain a high seed yield equal to or superior to that in Fukuyutaka under the conventional culture.

【 授权许可】

Unknown