Effects of Drying and Temperature During Storage of Rice Seeds Coated with an Oxygen Supplier on the Seedling Emergence

Japanese Journal of Crop Science

Satoshi YOSHINAGA¹  Kohei TASAKA¹  Tatsushi TOGASHI¹  Kenzo WAKIMOTO¹ 

关键词: Coating with an oxygen supplier;    酸素供給剤被覆;    Rice;    出芽性;    Seedling emergence;    水稲;    Storage temperature;    湛水直播;    Submerged direct-seeding;    貯蔵温度;   

DOI  :  10.1626/jcs.69.146

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In submerged direct-seeding rice (Oryza sativa L.) cultivation, it is important to stabilize the emergence of seedlings. We examined the effects of drying and temperature during storage of rice seeds coated with an oxygen supplier on the seedling emergence. The seedling emergence rate was not affected by the storage at 10°C for 3 days. However, the emergence of seedlings was stimulated by 3-day storage at 15-30°C, and the stimulation was especially clear at 20 and 25°C. In the seeds which ware not dried or excessively dried after the seed coating, the stimulation of seedling emergence in spite of a 3-day storage at 20 or 25°C was less evident than in the seeds which ware dried to lose 2 to 5% weight after coating. The stimulatory effect of the 3-day storage at 20-25°C was observed in all rice cultivars examined irrespective of the method of water management after seeding. Since thiss stimulatory effect was not reduced by a subsequent 7-day storage at 10°C, the seeds with high emergence ware considered to have retained the high emergence ability due to the storage for a long period at a low temperature.

【 授权许可】

Unknown