水稲湛水直播栽培における酸素発生剤種子被覆および播種前の代かきによる石灰窒素の出芽障害緩和

日本作物学会紀事

脇本 賢三¹  田坂 幸平¹  大森 博昭²  松島 憲一¹  吉永 悟志¹ 

[1] 農業技術研究機構;電気化学工業株式会社

关键词: Oxygen supplier;    酸素発生剤;    Puddling;    代かき;    Direct seeding of rice in submerged paddy field;    水稲湛水直播;    Apple snail;    スクミリンゴガイ;    Calcium cyanamide;    石灰窒素;    Chemical injury;    薬害;   

DOI  :  10.1626/jcs.72.282

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effect of seed coating with oxygen supplier on the suppression of rice-seedling emergence by calcium nitrate applied to control apple snail, was examined in pots and petri dishes. The seed coating with oxygen supplier tended to promote elongation of the seedling in the soil supplied with calcium nitrate. Addition of oxygen supplier to calcium nitrate solution reduced the concentration of calcium cyanamide showing that the oxygen supplier decomposed calcium nitrate. The effect of soil puddling before seeding on the seedling emergence in the soil supplied with calcium nitrate was investigated in pots. The soil puddling before seeding promoted seedling emergence in the soil supplied with calcium nitrate, reducing the concentration of calcium cyanamide in the flood. In the field experiment, the seedling emergence from the seeds coated with oxygen supplier was inhibited by applying 8g nitrogen/m2 of calcium nitrate, but not by 4g nitrogen/m2 of calcium nitrate. Thus, we recommend puddling before seeding and coating the seed with oxygen supplier when apple snail is controlled by calcium nitrate in submerged direct seeding of rice. The suitable dosage of calcium nitrate for the effective control of apple snail without chemical injury was estimated to be 4g/m2 as nitrogen.

【 授权许可】

Unknown