中国産多収性水稲品種の吸収窒素利用効率に及ぼす緩効性肥料の施用効果

日本作物学会紀事

吉田 徹志³  居 静⁵  浅木 直美⁴  山本 由徳³  王 余龍⁵  宮崎 彰³  小久保 敏明¹  上野 秀人² 

[1] 愛媛大学大学院連合農学研究科;愛媛大学農学部;高知大学農学部;茨城大学農学部;揚州大学

关键词: Chinese high-yielding cultivar;    中国産多収性品種;    Nitrogen use efficiency for grain yield;    吸収窒素利用効率;    Rice;    水稲;    Slow release fertilizer;    緩効性肥料;    Yield production;    収量生産;   

DOI  :  10.1626/jcs.82.337

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Nitrogen (N) use efficiency for grain yield (the grain yield per absorbed N) in Chinese high-yielding rice cultivars grown with different types of slow release fertilizers (linear and sigmoid types) was analyzed. The amount of N absorbed and dry weight in Yangdao 4 (YD), Wuyugen 3 (WY) and Hinohikari (HH) were significantly increased by applying slow release fertilizers. With increasing amount of absorbed N, the N use efficiency for grain yield was lowered, but the N use efficiency for grain yield in YD and WY grown with sigmoid type slow release fertilizer tended to be higher than that with split application of ammonium chloride irrespective of the amount of N absorbed, due to higher percentage of grain filling. YD had a lower percentage of immature grains than HH, probably due to the high specific gravity of the heavy grains. In addition, the decrease in the amount of straw dry matter during the ripening stage was significantly larger in YD than in HH. These traits may result in the stably high percentage of grain filling.

【 授权许可】

Unknown