生育後期重点施肥がコムギの生育と収量に及ぼす影響

日本作物学会紀事

西谷 友寛¹  江原 宏³  中園 江⁴  西村 奈月²  松島 弘明¹  谷尾 昌彦⁴  中村 大輔¹  渡邊 和洋⁴ 

[1]三重大学生物資源学部

[2]三重大学大学院生物資源学研究科

[3]名古屋大学農学国際教育協力研究センター

[4]農研機構中央農業研究センター

关键词: コムギ;    生育後期重点施肥;    耐倒伏性品種;    多収;    多肥栽培;    窒素;    Heavy Manuring Culture;    Higher Top to Basal Dressing Ratio;    High-Yielding Culture;    Lodging Resistant Variety;    Nitrogen;    Wheat;   

DOI  :  10.1626/jcs.85.373

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In order to develop a high-yielding culture method for wheat we examined the effects of a higher top to basal nitrogen dressing ratio (HTBD) on the growth and yield of the new lodging tolerant variety “Satonosora” for two years. The reduced basal dressing accompanied with increased top dressing, increased the leaf area index (LAI) after jointing stage, and maintained a high net assimilation rate (NAR) during the late ripening period resulting in increased dry matter production. On the other hand, smaller stem number due to reduced basal dressing and plentiful nitrogen top dressing at the jointing stage were considered to alleviate competition of assimilate and nitrogen among stems and improved stem survival rate, resulting in both larger panicle number and panicle size. High NAR during the late ripening period might also increase the 1000 grain weight. As a result of the increased dry matter production and yield components, a HTBD increased the yield of wheat by 15 - 50%. On the other hand, some problems hindering practical use were clarified; delay of maturation, decline in the apparent quality, excess grain protein content, and acceleration of soil acidification.


【 授权许可】

Unknown