群馬県東毛地域の早植・普通期水稲栽培における育苗箱全量基肥施肥法の継続が水稲の生育・収量に及ぼす影響

日本作物学会紀事

高橋 行継²  吉田 智彦¹ 

[1] 宇都宮大学農学部;群馬県西部農業事務所

关键词: Controlled availability fertillizer;    肥効調節型肥料;    Early planting;    早植;    Fertilization;    施肥;    Labor-saving;    省力;    Normal season culture;    普通期;    Nursery box;    育苗箱;    Paddy rice;    水稲;    Successive cultivation;    継続栽培;   

DOI  :  10.1626/jcs.77.348

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 growth and yield of paddy rice cultivated by the method of single whole basal fertilizer application to the nursery box in early and normal season culture in Tomo area of Gunma Prefecture. The soil of this area was gley soil, and the paddy fields were fertile. The controlled availability fertilizer named “Naebako-makase NK301—100” was used and the experiments were conducted for 4 years in the farmer's field in Tatebayashi city. The amount of nitrogen fertilizer was reduced by 40% compared with the standard fertilizer. Furthermore, phosphoric acid and potassium were not supplied because last year's rice straw was plowed into the field. In the first year, rice growth and yield were lower than in the control plot, because the amount of nitorogen fertilizer was reduced by 49% as compared with the standard fertilizer. From the second to the fourth year, the amount of nitrogen fertilizer was reduced by 38—45%, but no significant difference in growth and yield was found. However, since severe insect damage occurred in the third year, an additional experiment was conducted in the fourth year under the same condition. Judging from the results of the three years, we considered that even without the supply of phosphoric acid and potassium chemical fertilizer, plowing all rice straw into the soil, and reducing nitrogen fertilizer by about 40% resulted in the growth and yield equal to those in the standard fertilizer application.

【 授权许可】

Unknown