岩手県地方における秋播性コムギ冬期播種栽培の播種適期と最適播種量

日本作物学会紀事

作山 一夫²  荻内 謙吾²  高橋 昭喜¹ 

[1] 岩手県農業研究センター県北農業研究所;岩手県農業研究センター

关键词: Seeding date;    播種適期;    Seeding density;    最適播種量;    Wheat;    コムギ;    Winter habit;    秋播性;    Winter seeding;    冬期播種;   

DOI  :  10.1626/jcs.73.396

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Winter wheat, usually seeded in autumn, was seeded before continuous snow cover to avoid the overlap between work for wheat sowing and rice harvesting. Then, the optimum seeding date and seeding density were determined. Winter wheat cultivar “Nanbukomugi” was seeded at intervals from early October to late November in 2000 ndash; 2002. The seedlings emerged when accumulative mean temperature above 0°C after seeding reached 95 ndash; 115°C. When the seeding date was early and accumulative mean temperature reached 95 ndash; 115°C before continuous snow cover, frost damage of the seedlings was serious. On the other hand, when seeding date was as late as early to late December, seedlings emerged after overwintering at a high rate, and grew and matured normally. We consider that the suitable seeding date for winter-seeding cultivation in Iwate Prefecture is early to late December. The winter-seeded wheat was inferior to the nomal autumn-seeded wheat in top growth, but had a large number of ears, low lodging frequency and a high grain yield of 379 g/m2, which was 95% of that in autumn-seeded wheat. The appearance quality of the grain was also nearly the same as that in autumn-seeded wheat, and the protein content of the grain was 14.4%, which was 1.4 point (%) higher than that in autumn-seeded wheat. The number of ears increased linearly with increasing seeding density. Grain yield also increased with increasing seeding density, but the maximum yield was 350 grains/m2.

【 授权许可】

Unknown