埼玉県におけるコムギの生育，収量および収量構成要素と気象変動の関係

日本作物学会紀事

箕田 豊尚³  小林 和彦¹  平沢 正² 

[1] 東京大学大学院農学生命科学研究科;東京農工大学連合農学研究科;埼玉県農業技術研究センター

关键词: Climatic fluctuation;    気象変動;    Global warming;    温暖化;    Growth response;    生育反応;    Long-term experiment;    長期試験;    Multiple-regression analysis;    重回帰分析;    Yield;    収量;    Yield components;    収量構成要素;    Wheat;    畑作コムギ;   

DOI  :  10.1626/jcs.84.285

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

We analyzed the effects of climatic fluctuations on wheat (Triticum aestivum) cultivar ‘Norin 61’ grown by the same cultivation method on an experimental field in Saitama Prefecture from 1951 to 1996. The heading and maturity had become earlier and the number of days from heading to maturity increased during the 45 years. No trends were observed, however, in the culm length, yield, or yield components. Multiple-regression analysis was performed on the relationships between climatic fluctuations and the wheat growth and yield across the study period. The number of days from seeding to heading was significantly reduced by increase in mean air temperature from November to April. The number of days from seeding to maturity was also significantly reduced by the increase in mean air temperature for the same period and in May. The culm length was significantly increased under higher total precipitation from January to April and higher mean air temperature in March. Yield was reduced by higher mean air temperature from November to December and greater precipitation in the period from heading to maturity. The yield reduction was attributed to the reduced number of grains per spike due to the increased mean air temperature from November to December and increased precipitation in May. These results highlighted the number of grains per spike as a critical trait for stable wheat production against climatic fluctuations.

【 授权许可】

Unknown