Hot Water Seed Disinfection Promotes Germination and Seedling Emergence in Hokkaido Rice Cultivars under Low Temperature Conditions

日本作物学会紀事

Yoshiyuki Sagehashi^1¹  Yutaka Sato^2² 

[1] Hokkaido Agricultural Research Center, NARO^1;Hokkaido Agricultural Research Center, NARO^2

关键词: Hot water disinfection;    Paddy rice;    Direct-seeding;    Low temperature Emergence;    Low temperature Germination;   

DOI  :  10.1626/jcs.87.192

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Hot water treatment of rice seed is a common disinfection method that requires no agricultural chemicals. However, the effect of hot water treatment on seed germination remains unclear. In the present study, we examined the effect of the treatment with 60°C water for 10 minutes on seed germination and seedling emergence in Hokkaido rice cultivars under normal and low temperature conditions. Under the normal temperature (27ºC) conditions, hot water treatment only slightly improved the early germination rate. In contrast, under low temperature (15ºC) conditions, germination was promoted by the hot water treatment. Germination of rice seeds harvested in 2014 was more promoted by hot water treatment than those harvested in 2015. In “Nanatsuboshi”, “Yumepirika” and “Oborozuki” cultivars harvested in 2014, seedling emergence rates under low temperature conditions were improved by hot water treatment. Thus, hot water seed treatment is a possible sterilization method for direct-seeding, which promotes seed germination and seedling emergence in Hokkaido rice cultivars grown under low temperature conditions.

【 授权许可】

CC BY