異なる栽培法における欠株が水稲の生育・収量に及ぼす影響

日本作物学会紀事

三枝 正彦¹  佐々木 倫太郎¹  関口 道²  鈴木 和美¹  渡邊 肇¹ 

[1] 東北大学大学院農学研究科附属複合生態フィールド教育研究センター;宮城県古川農業試験場

关键词: Cultivar;    欠株;    Plant type;    草型;    Planting density;    栽植密度;    Rice (Oryza sativa L.);    水稲;    Readily available fertilizer;    速効性肥料;    Controlled availability fertilizer;    肥効調節型肥料;    No-tillage cultivation;    不耕起栽培;    Compensatory effect;    補償作用;    Vacant hill;   

DOI  :  10.1626/jcs.78.95

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Field trials were conducted to evaluate the effects of vacant hills on growth and yield characteristics of rice (Oryza sativa L.) under several cultural conditions. In side dressing of readily available fertilizer with conventional tillage, the number of stems and grain yield seemed to decrease with increasing number of vacant hills. In contrast, the panicle number and number of grains per head seemed to increase with increasing the number of vacant hills in the same cultivation. The compensatory effects of plants adjacent to vacant hills were particularly obvious in plants located in the same row, as compared with those in adjacent rows. However, the magnitude of the compensatory effects varied with the method of fertilizer application, plant type, plant density, and the presence or absence of tillage ; the effects of vacant hills on the performance of the rice plant was smaller in CAF(controlled availability fertilizer) and sparse planting plots, and this was not the case in any plots of many-tillering type cultivar and no-tillage cultivation with CAF.

【 授权许可】

Unknown