「エアーアシスト条播機」を用いて湛水直播した多収性水稲品種タカナリの乾物生産と収量

日本作物学会紀事

帖佐 直¹  大川 泰一郎¹  平沢 正¹  古畑 昌巳²  本林 隆¹  東城 清秀¹  向山 雄大¹ 

[1] 東京農工大学大学院農学府;中央農業総合研究センター北陸研究センター

关键词: Air-assisted drill;    エアーアシスト条播機;    Dry matter production;    乾物生産;    Grain yield;    収量;    Light extinction coefficient of the canopy;    個体群吸光係数;    Light interception of the canopy;    個体群受光率;    Nitrogen accumulation during ripening;    登熟期窒素蓄積量;    Planting pattern;    栽植様式;    Rice;    水稲;   

DOI  :  10.1626/jcs.81.414

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The lodging-tolerant rice cultivar, Takanari, was directly seeded with an “air-assisted drill” in the paddy field, and its dry matter production and grain yield were compared with those in the plants, hill-seeded and conventionally transplanted in 2009, 2010 and 2011. In the air-assisted drilled rice, plants were scattered around the row, which was quite different from the hill-seeded rice. The air-assisted drilled rice produced heavier dry matter and had a higher grain yield than the hill-seeded and transplanted rice, because of the higher crop growth rate. During the tillering stage, tiller number and leaf area index increased more rapidly in the air-assisted drilled rice than in the conventionally transplanted rice and this resulted in higher light interception of the canopy in the air-assisted drilled rice. Compared with the hill-seeded and conventionally transplanted rice, the air-assisted drilled rice had a lower light extinction coefficient of the canopy at the ripening stage and larger number of crown roots on the main stem with more nitrogen accumulation during the ripening period. These characteristics might contribute to the higher dry matter production in the air-assisted drilled rice.

【 授权许可】

Unknown