寒地における水稲の湛水土中直播栽培の播種様式が収量に及ぼす影響

日本作物学会紀事

天野 高久¹  森脇 良三郎¹  丹野 久¹  山崎 信弘¹  相川 宗嚴¹ 

[1] 北海道立上川農業試験場

关键词: Broadcast seeding;    散播;    Direct seeding pattern;    湛水土中直播;    Grain yield;    収量;    Hill seeding;    点播;    Rice;    水稲;    Row seeding;    条播;    Submerged soil condition;    播種様式;   

DOI  :  10.1626/jcs.76.586

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effects of seeding pattern, namely broadcast seeding (BS), row seeding (RS) with 15, 20 and 30 cm row spacing (RS-15, 20-, 30) and hill seeding (HS) (30 cm row spacing and 10 cm hill spacing) in direct seeding of rice under a submerged condition on the number of tillers, grain yield and yield components were investigated in Hokkaido. Values of the dry weight of individual plants at the establishment stage of seedling (5 leaf stage) and tiller number/m2 and ear number/m2 were higher in BS, RS-15, -20 and were lowest in HS among all seeding patterns. The number of spikelets/m2 was larger in BS and RS-15, and-20, the weight of rice screenings was higher in BS and HS than in the other seeding pattern, and grain yield was highest in RS-15, and-20 about 107-108%of that in RS-30. On the other hand, grain yield in HS was only 96%of that in RS-30. Lodging resistance and blast disease resistance were inferior in RS with narrow spacing. For these reasons, it is concluded that RS-20 is the best seeding pattern in Hokkaido.

【 授权许可】

Unknown