Japanese Journal of Crop Science | |
Effects of High Air Temperature on Ripening in Rice Plants : Analysis of ripening performance under climate conditions by changing in cropping seasons and/or transferring pots from lowland to upland | |
Satoshi MORITA1  | |
关键词: Cropping season; 玄米1ç²’é‡; Grain position; 玄米å“質; Grain quality; 高温; Grain weight; 作期; High temperature; 水稲; Rice; ç€ç²’ä½ç½®; Ripening; 登熟; Solar radiation; 日射é‡; | |
DOI : 10.1626/jcs.69.400 | |
学科分类:农业科学(综合) | |
来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan | |
【 摘 要 】
The effects of high temperature in August in Fukuyama city, Japan, on the grain weight and the grain quality of rice plants were examined. Air temperature was manipulated by 1) changes in cropping seasons by different planting dates adn 2) transferring pots from lowland to upland at the heading stage. In the first experiment, no significant differences were found among the mean grain weights and the grain quality of any cropping seasons. In the second experiment, not significant difference was found in the mean grain weight between the two treatments, but significant differences in the grain quality and the weights of grain with a thickness of more than 1.9mm were observed. In experiments 1) and 2), the grain weight/mean solar radiation during 20 days from the 4 days after flowering stage at the top of the panicles(=S20)correlated negatively with the mean temperature at that stage. The rate of normal grains/S20 did also. These results suggest that the neggative influence of high temperature, 27∼28°C, on grain weight is counteracted when solar radiation increases, accompanied by remperature increase. When temperature increases without increases in solar radiation, however, the grain weight and grain quality were adversely affected.
【 授权许可】
Unknown
【 预 览 】
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RO201912010131104ZK.pdf | 956KB | download |