北陸地域における水稲鉄コーティング湛水直播栽培のコーティング量， 播種深および播種後の水管理が出芽・苗立ちに及ぼす影響

日本作物学会紀事

市川 岳史¹  東 聡志²  佐藤 徹² 

[1] 新津農業改良普及指導センター;新潟県農業総合研究所作物研究センター

关键词: Iron-coated seed;    鉄コーティング種子;    Rice;    水稲;    Seeding depth;    播種深;    Seedling establishment;    苗立ち;    Submerged direct seeding;    湛水直播;    Water management;    水管理;   

DOI  :  10.1626/jcs.80.157

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

We examined the effects of the amount of iron coating, seeding depth and water management after seeding on seedling emergence and establishment of rice direct-seeded in a submerged paddy field in Hokuriku region. The results of a field survey showed that air temperature and water management after seeding influenced seedling establishment. However, the influence of the amount of iron coating was not distinct. In the field experiment, the seeds coated with iron powder, a quarter and half times as heavy as seed dry weight (Fe 0.25 and Fe 0.5), and with calcium peroxide were sown under different water management (drainage, wetness and flooding) conditions. The rate of seedling establishment was higher in Fe 0.25 than in Fe 0.5 and in the drained and wet plots than in the flooded plot. Furthermore, the rate of seedling establishment was decreased by seeding below the surface of soil more greatly in the iron-coated seeds than in the calcium peroxide coated-seed. In the vat experiment, seedling emergence of the seed sown on the soil surface was delayed by drainage, but seedling emergence was increased with increasing seed moisture. In the seed seeded below the soil surface, seedling establishment was decreased by flooding. To improve the seedling establishment of direct-seeded iron-coated rice, it is important to sow Fe 0.25 seed on the soil surface and drain after seeding, and to supply the moisture necessary for germination to the seed.

【 授权许可】

Unknown