寒地水稲の湛水土中直播栽培における収量および食味関連形質の特性

日本作物学会紀事

沼尾 吉則¹  宗形 信也²  平山 裕治²  前川 利彦¹  丹野 久²  尾崎 洋人³  菅原 彰²  本間 昭²  荒木 和哉³ 

[1] 北海道立上川農業試験場;北海道立中央農業試験場岩見沢試験地;北海道立道南農業試験場

关键词: Amylose content;    アミロース含有率;    Direct seeding under submerged soil condition;    湛水土中直播;    Grain yield;    収量;    Harvest index;    収穫指数;    Protein content;    蛋白質含有率;    Ratio of kernel number of grain yield to total ripened glumes;    稔実籾収量粒数比;    Rice;    水稲;    Transplanting;    移植;   

DOI  :  10.1626/jcs.77.356

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Grain Yield (GY), its components and palatability of rice direct-seeded under a submerged soil condition (direct-seeded rice, DSR) were compared with those of transplanted rice (TR) applying a similar amount of nitrogen fertilizer during 1997—2002 and 2004—2006 in Hokkaido. In central Hokkaido, three early maturity varieties (early MVs) were cultivated as DSR, and the early and three medium MVs as TR. In southern Hokkaido, the medium MVs were cultivated as DSR, and the medium and a late MV as TR. The heading date of DSR was 8.1—10.7, and 4.0—7.9 days later than that of TR with the same and one-rank later MV, respectively. The ratio of kernel number of GY to total ripened glumes and harvest index were lower in DSR than in TR. Thus, GY in DSR was only 76.9—99.7%, 86.9% on the average, of that in TR with a later MV, and promotion of growth after heading is needed for improving GY of DSR. In DSR amylose content was higher and the max value of gelatinization property was lower due to the lower temperature during ripening. The protein content in DSR was lower than that of TR in the same MV, but similar to that in TR with a later MV. Farmers cultivate earlier MV by direct seeding and DSR is disadvantageous for producing palatable rice.

【 授权许可】

Unknown