中山間地における育苗箱全量施肥による水稲の不耕起移植深水栽培

日本作物学会紀事

三枝 正彦¹  日高 秀俊¹  大江 真道²  渋谷 暁一¹  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;大阪府立大学大学院生命環境科学研究科

关键词: Controlled-release fertilizer;    全量基肥施用;    Cool weather damage;    冷害;    Deep-flood irrigation;    深水栽培;    Hilly and mountainous regions;    中山間地;    No-tillage cultivation;    不耕起栽培;    Rice plant;    水稲;    Single basal application of fertilizer;    肥効調節型肥料;    Tiller;    分げつ;   

DOI  :  10.1626/jcs.75.264

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 examine the growth and yield characteristics of rice (Oryza sativa L.) cultivated in deep-flood irrigation under no-tillage cultivation with single basal fertilization to the nursery box in hilly and mountainous regions, where low temperatures often cause cool weather damage and where labor-saving and low-cost cultivation is also required. Three water management regimes were designed: DF-I (deep-flood irrigation from early growth stage to heading), DF-II (deep-flood irrigation from productive tiller stage to heading), and CWM (conventional water management). The maximum tiller number and panicle number per m2 in the DF-I plot were smaller than those in the CWM and DF-II plots in 1999. In contrast, panicle number per m2 in the DF-II plot was comparable to those in the CWM plot in both years. Panicle number per m2 positively and significantly correlated with grain yield in 2000. The percentage of grain filling was significantly improved by DF. No significant differences in rice yields were observed among the water management regimes in both years. Nitrogen recovery of the fertilizer by rice was not significantly affected by the water management regime, whereas the no-tillage plot showed higher nitrogen recoveries of the fertilizer than those of the tillage plot. Considering the results, we suggest that DW-II with no-tillage cultivation is effective for both avoiding cool weather damage and for developing low-cost and labor-saving rice culture in hilly and mountainous regions.

【 授权许可】

Unknown