超低水分贮存对水稻种子生活力及生理特性的影响  

The Influence of Ultra-low Moisture Content on Stored Rice Seed's Viability and Physiological Chacateristics

作　　者：支巨振 毕辛华[2] 

机构地区：[1]农业部全国种子总站 [2]浙江农业大学

出　　处：《种子》1991年第4期19-23,共5页Seed

摘　　要：前言改善种子耐藏性和延长种子寿命在很大程度上取决于控制种子水分与贮藏温度。通常种子水分对种子寿命的影响较贮藏温度更为重要(Bass,1980)。Ellis和Roberts近几年(1982,1985,1986)对芝麻等十几种种子研究证实:正常型气干种子水分与寿命存在对数关系。令人感兴趣的是它们在超低水分(低于5±1%)条件下也符合此关系。Ellis等1986年将芝麻水分从5%降至2%,寿命提高40倍。Rao等(1987)This paper deals with the influences of ultra-low moisture content and the rate of desiccation on rice seed viability and physiological preperty by desiccation with four kinds of desiccants(phosphorus pentoxide, calcium oxide, calcium choride and silica gel). Difference between indica and japonica is significant in minimun-safe moisture content, the indica rice is 5%, while japonica rice is 7%. The humidification treatment of ultra-low moisture content indica rice prior to germination can increase its viability and vigour, while in japonica rece it has only a little advantage.Decline of viability and vigour was correlated with the rate of desiccation, when high dosage of phosphorus pentoxide were used. The rate of desiccation was for more quick in phosphorus pentoxide than in silica gel. By contrast, the rate of deiccation by calcium oxide and calcium choride is less than that of phosphorus pentoxide, thus the former are feasible for seed storage and germplasm conservation, the dosage is suitable that the weight of desiccant and seed is in a ratio of half to one.

关 键 词：水稻 贮存 水分 种子 生活力 生理 

分 类 号：S511.103.2[农业科学—作物学]