关键词：
南山茶;60Co-1辐射;发芽率;苗高;叶片生长;叶绿素含量
摘 要：
为了探究60Co-y辐射对不同南山茶优树种子发芽和幼苗生长的影响,选取3株南山茶优树种子分别进行0(对照)、10、20、30Gy60co-y辐射处理.结果表明:增城1号种子经10Gy辐射,其种子发芽率和幼苗成活率分别为29.00%和5.00%,11月苗高为16.56cm,均为4个处理中最低值;东莞5号和广宁2号则表现为30Gy辐射组成活率、苗高、叶片生长指标居4个处理中最低;增城1号20、30Gy辐射组叶绿素含量均高于对照组,而东莞5号和广宁2号则表现为辐射组叶绿素含量均低于对照组.对增城1号发芽及生长抑制作用最强的辐射剂量为10Gy,对东莞5号、广宁2号发芽及生长抑制作用最强的为30Gy,表明3株南山茶优树对60co-y辐射的响应不完全一致.
译 名：
Effects of 60Co-Y Radiation on Seed Germination and Seedling Growth of Three Strains of Camellia semiserrata
关键词：
Camellia semiserrata%60Co-Y radiation%germination rate%height growth%leaf growth%chlo-rophyll content
摘 要：
In order to explore the influence of 60Co-Y radiation on different trees of Camellia semiserrata including germination and seedling growth,the seeds of three strains of Camellia semiserrata were irradia- ted by 60Co-Y radiation of 0 Gy,10 Gy,20 Gy and 30 Gy respectively. The result showed that the germina- tion rate, survival rate and seedling length in November of Camellia semiserrata ' Zengcheng No. 1 ' of 10 Gy group were 29.00% ,5.00% and 16.56 cm respectively,which were the lowest of the four groups. In the contrary,the survival rate, seedling length and leaf index of Camellia semiserrata ' Dongguan No. 5 ' and ' Guangning No. 2' of 30 Gy group were the lowest of the four groups. The chlorophyll contents of Camellia semiserrata ' Zengcheng No. 1 ' in higher radiation groups(20 Gy and 30 Gy) were higher than the control group, but the chlorophyll contents of Camellia semiserrata ' Dongguan No. 5 ' and ' Guangning No. 2' of the control group were higher than the radiation groups. The radiation dose showing strongest in- hibition to germination and growth of Camellia semiserrata ' Zengcheng No. 1 ' was 10 Gy,but to Camellia semiserrata ' Dongguan No. 5 ' and ' Guangning No. 2 ' was 30 Gy. It suggested that the reaction of three strains of Camellia semiserrata to the 60Co-Y radiation was inconsistent.
