中華めん用コムギ品種「ちくしＷ2号」の子実タンパク質含有率における施肥窒素の利用率と地力窒素の寄与率

日本作物学会紀事

石丸 知道³  荒木 雅登⁴  荒木 卓哉¹  山本 富三² 

[1] 愛媛大学農学部;元福岡県農業総合試験場豊前分場;福岡県農林業総合試験場豊前分場;福岡県農林業総合試験場

关键词: 子実タンパク質含有率;    重窒素標識硫安;    施肥窒素利用率;    窒素寄与率;    中華めん用コムギ;    Chinese noodle wheat;    Fertilizer nitrogen utilization rate;    Grain protein content;    Nitrogen absorption;    Nitrogen contribution ratio;    15N-labeled ammonium sulfate;   

DOI  :  10.1626/jcs.85.385

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

An effective fertilizer system is required to achieve high and stable grain protein levels in the wheat cultivar “ChikushiW2” for Chinese noodles. In this study, we examined the fertilizer nitrogen utilization rate (FNU), grain nitrogen content, nitrogen contribution ratio (NCR) of nitrogen fertilizer, and nitrogen fertility using 15N-labeled ammonium sulfate in “ChikushiW2” to determine the nitrogen kinetics in wheat plants. At the early-ripening stage, nitrogen was distributed within the range 78-83% in foliage and 17-22% in grain. Nitrogen translocated from foliage to grain during the middle-ripening stage, with a final grain accumulation of 87-89% of the nitrogen at the late-ripening stage. FNU of the basal dressing was the lowest at 15-20%, increasing to 37-56% for the topdressing at tillering stage with annual variation, and highest at 67-74% for the topdressing at the panicle formation stage and the topdressing at full heading. NCR in the grain nitrogen content was lowest at 4-7% for basal dressing, 10-14% for the topdressing at the tillering stage and topdressing at the panicle formation stage, 24-30% for the topdressing at full heading, and highest at 41-49% for nitrogen fertility. These results indicate that reducing the quantity of low FNU basal dressing, reducing the variable FNU on the topdressing at the tillering stage, and adjusting the timing and quantity of fertilizer application on the high-FNU topdressing at the panicle formation stage, may be effective in enhancing and stabilizing the grain protein content.

【 授权许可】

Unknown