浸种型晚稻专用种衣剂包衣种子贮藏安全性研究

本文研究了浸种型晚稻专用种衣剂包衣种子在常温和低温条件下连续 1 8个月的贮藏过程中水分和发芽率的变化 ,结果表明 :贮藏过程中包衣种子和未包衣种子的水分含量变化规律基本相同 ;种子包衣后发芽率下降速度比未包衣种子慢 ,有利于种子寿命的延长。在长江中下游地区包衣种子贮藏前必须晒干或烘干 ,包衣后不经晒干直接贮藏 ,其发芽率在高温高湿条件下将迅速下降。

Study on Storage Security of Hybrid Rice Seeds Coated with Soaking-type Seed Coating Chemicals Specially for Late Season Rice

Water content and germination percentage of hybrid rice seeds which had been coated with soaking-type seed coating chemicals specially for late season rice were studied at different storage stages ranging from zero to eighteen months.The results demonstrated that the change laws of water content in coated and uncoated seeds are basically the same.The declining speed of germination percentage of coated seeds is much slower than that of uncoated seeds, showing the coating chemicals have the function of prolonging the life of hybrid rice seeds.If the seeds are not dried up immediately after being coated,the germination percentage of coated seeds will drop rapidly under the conditions of high temperature and high relative humidity,so in the process of coating seed,the coated seeds must be dried up before storage in the middle and lower reaches of Changjiang River valley.;