水稲多収品種における登熟期気象条件と収量との関係の品種間差

日本作物学会紀事

中野 洋²  長田 健二¹  吉永 悟志³  大角 壮弘³ 

[1] 農研機構近畿中国四国農業研究センター;農林水産技術会議事務局;農研機構中央農業総合研究センター北陸研究センター

关键词: 収量;    水稲;    登熟;    登熟気温;    日射量;    品種間差;    Air temperature after heading stage;    Cultivar difference;    Grain filling;    Rice;    Solar radiation;    Yield;   

DOI  :  10.1626/jcs.85.367

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 cultivar difference in the relationship between rice grain yield per solar radiation (Y/R) and air temperature (T) during 40 days after heading using high-yielding cultivars Bekoaoba, Momiroman, Takanari and Hokuriku 193, and control cultivars Akihikari and Nipponbare. The relationship was regressed to a quadratic equation in all cultivars. The maximum Y/R in the equation was higher in Bekoaoba, Takanari and Hokuriku 193 than in the control cultivars. The T value at which the maximum Y/R was obtained was 21.1 in Bekoaoba, a japonica cultivar with a large grain size, and was similar to that in the control cultivars (21.2). In contrast, the T values in the indica cultivars Takanari and Hokuriku 193, and the indica-japonica cross Momiroman was 23.9–24.7, which was higher than in the control cultivars. We concluded that there is a cultivar difference in the response of Y/R to T, and that the optimum temperature during the grain filling period could be 3 degrees higher in Momiroman, Takanari and Hokuriku 193 than in Bekoaoba.


【 授权许可】

Unknown