窒素追肥の時期がコムギ品種 「ユメシホウ」 の収量および 子実タンパク質含有率に及ぼす影響

日本作物学会紀事

平沢 正¹  松山 宏美²  島崎 由美²  渡邊 好昭² 

[1] 東京農工大学大学院農学府;農研機構中央農業総合研究センター

关键词: Dry matter accumulation;    乾物蓄積;    Foliar application;    葉面散布;    Grain protein content;    子実タンパク質含有率;    Nitrogen accumulation;    窒素蓄積;    Nitrogen fertilizer topdressing;    窒素追肥;    Wheat (Triticum aestivum L);    コムギ（Triticum aestivum L）;   

DOI  :  10.1626/jcs.83.25

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In two growing seasons (2008-09 and 2009-10) we applied nitrogen topdressing every 1 to 2 weeks from stem elongation to ripening, and examined the effects on yield, grain protein content, and dry matter and nitrogen accumulation in the spikes after anthesis in ‘Yumeshihou’ wheat. Topdressing at the stem elongation stage about 16 days before anthesis, and that at the mid-grain-filling stage about 20 days after anthesis tended to increase the yield in both growing seasons. The topdressing at about anthesis did not increase the yield owing to a decrease in grain number per spike. Dry-matter accumulation after anthesis was increased by topdressing at the stem-elongation and mid-grain-filling stages. Grain protein content was increased by topdressing at anthesis to ripening stage but not by topdressing at the stem elongation stage. The lack of increase in grain protein content in the plants topdressed at the stem elongation stagewas attributed to an increase in dry matter accumulation before and after anthesis as well as nitrogen accumulation in the spikes. Topdressing after anthesis significantly increased in grain protein content in plants because nitrogen accumulation in the spikes was greater than the dry matter accumulation after anthesis.

【 授权许可】

Unknown