寒冷地における酸化鉄コーティング種子を利用した湛水直播水稲栽培の 出芽・苗立ち，乾物生産および収量特性

日本作物学会紀事

帖佐 直¹  古畑 昌巳²  大角 壮弘²  松村 修² 

[1] 東京農工大学農学部;中央農業総合研究センター北陸研究センター

关键词: Cold climate area;    寒冷地;    Direct seeding under submerged paddy field;    湛水直播;    Dry matter production;    乾物生産;    Floating seedling;    浮き苗;    Iron-coated seed;    鉄コーティング種子;    Rice;    イネ;    Seedling emergence;    出芽;    Yield;    収量;   

DOI  :  10.1626/jcs.81.33

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In 2008 and 2009, the characteristics of seedling emergence, dry matter production, and yield of rice direct-seeded using iron-oxide-coated seeds (Fe-seeds) were examined in comparison with those in rice direct-seeded using calcium-peroxide-coated seeds (Ca-seeds) to establish a method of direct seeding of Fe-seeds in a cold climate area. In direct seeding of Fe-seeds, early growth was reduced by a low temperature for about 4 days after seeding, compared with that in direct seeding of Ca-seeds. Thus, increase in dry weight of the top, tiller number, leaf area index, and nitrogen uptake of the seedling from Fe-seeds was delayed resulting in reduced numbers of panicles and spikelets, and yield was reduced. Even under such conditions, early growth in direct seeding of Fe-seeds was improved by seeding nearer the soil surface, and thus, the degree of the yield reduction by a low temperature was mitigated.

【 授权许可】

Unknown