適正子実タンパク質含有率からみた中華めん用コムギ品種 「ちくしW2号」 の穂揃期後の窒素追肥時期

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: Chinese Noodle Wheat;    中華めん用コムギ;    Grain protein content;    子実タンパク質含有率;    Nitrogen absorption;    窒素吸収;    15N labeled ammonium sulfate;    重窒素標識硫安;    Topdressing time after full heading time;    穂揃期追肥時期;   

DOI  :  10.1626/jcs.84.155

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

We examined the nitrogen topdressing timing 15N labeled ammonium sulfate for increasing grain protein content above 12% in the wheat cultivar for Chinese noodles ‘ChikushiW2gou’. The topdressing at the full heading and 7 days later stably increased grain protein content above 12% regardless of the year. Also the number of days from full heading to topdressing correlated negatively with the ratio of nitrogen content of ripe grain derived from topdressing to topdressing nitrogen amount (nitrogen availability) and total nitrogen contents in ripe grain (nitrogen contribution ratio). Topdressing at full heading or 7 days later resulted in almost 60% of the nitrogen availability and 30% of nitrogen contribution ratio. The nitrogen availability in topdressing at 14 days after full heading time was affected by the rain after the topdressing. Topdressing at 21 or 28 days after heading hardly contributed to protein accumulation, resulting in a protein content of ripe grain of less than 12%. In this study, we concluded that the appropriate time of nitrogen topdressing for increasing grain protein content above 12% in “ChikushiW2gou” is from full heading to 7 days later, where the availability of topdressed nitrogen is more than 60% and the contribution ratio of topdressed nitrogen to grain protein is above 30%.

【 授权许可】

Unknown