ノンパラメトリック回帰によるイネの障害不稔歩合の推定法

日本作物学会紀事

小林 隆²  鳥越 洋一¹  三輪 哲久³  神田 英司² 

[1] 近畿中国四国農業研究センター;東北農業研究センター;農業環境技術研究所

关键词: Cool degree days;    冷却量;    Cool summer tolerance;    耐冷性;    Nonparametric regression;    ノンパラメトリック回帰;    Paddy rice;    イネ;    Sterility caused by cool summer;    障害型冷害;    Sterility percentage;    不稔歩合;   

DOI  :  10.1626/jcs.76.279

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To evaluate the incidence of cool summer damage as early as possible, we made a model to estimate the sterility percentage from the cool degree days in the consecutive developmental stages of young panicles. For estimation of the sterility percentage, we used nonparametric regression with, the limitation that the values of the adjoined partial regression coefficient β are not greatly different. The parameter for water temperature was decided from the relation between the water temperature and sterility percentage in the deep flooding experiments with cv. Akitakomachi. The contribution rate of the model using this parameter for estimation of sterile percentage was 77.2%. This parameter may be applied to other cultivars by assuming the difference of cool summer tolerance as the difference in the base temperatures of cool degree days. The base temperatures for cv. Sasanishiki, Akitakomachi and Hitomebore were 21.0°C, 20.5°C and 19.5°C, respectively. The parameter for air temperature was decided using several varieties with different cool summer tolerances the damage from cool summer in 2003 at Tohoku areas. The parameter of air temperature was useful for the evaluation of cool summer damage in the fields though the accuracy was lower than the parameter for water temperature. In conclusion, we can estimate the sterility percentage caused by cool summer in real time by running this model.

【 授权许可】

Unknown