柿种质资源田间耐寒性调查分析

对国家柿种质资源圃内资源进行调查认为,2008年初的低温虽不是陕西历史上冬季的最低温度,但由于持续时间长,同期平均温度低于正常年份,是造成大部分柿资源严重受冻的直接主要原因。冻害程度与柿资源的种类、品种、嫁接采用的砧木、树体生长势的不同有很大关系。调查结果表明:涩柿品种耐寒性高于甜柿品种;我国原产的甜柿品种耐寒性大于日本甜柿品种;甜柿品种中耐寒性强弱顺序为:阳丰次郎禅寺丸大秋早秋西村早生;同一品种嫁接于西村早生为中间砧上的冻害重于直接嫁接在君迁子上的;高接1~2 a的资源及树势衰弱树受冻害程度高。

Field Investigation of Cold Tolerance in Persimmon (Diospyros L. ) Germplasm

Persimmon germplasm resources in National Field Genebank for persimmon were observed after natural hard-cold winter in 2008.The results showed that long duration of cold and lower average temperature in winter 2008 were the direct reason of severe cold injury on many persimmon germplasm resources,although the winter temperature in Shaanxi province was not the lowest compared with same season of pass years.The degree of cold was related greatly with persimmon species,persimmon varieties,rootstocks and tree v...