水分胁迫对油茶容器苗生理特性及成活率的影响  

Effects of water stress on physical characteristics and survival rate of container seedling in Camellia oleifera

作　　者：曹志华[1] 胡娟娟[1] 束庆龙[1] 文佳[1] 詹文勇 徐广涛 卜基保 

机构地区：[1]安徽农业大学林学与园林学院,安徽合肥230036 [2]安徽德昌苗木有限公司,安徽六安231340 [3]安徽林业高科技开发中心,安徽合肥230031

出　　处：《经济林研究》2011年第4期60-64,共5页Non-wood Forest Research

基　　金：安徽省科技攻关项目(09010301080);安徽省油茶良种工程技术研究中心共同资助;安徽省教育厅省级重点项目(KJ2008A081)

摘　　要：为给油茶容器苗水分的科学管理提供理论依据,在不同失水程度下对油茶容器苗进行了根、茎、叶和基质电阻值以及叶和基质含水量的测定。结果表明:在失水程度0%～30%条件下叶片电阻值呈下降趋势,在失水程度0%～25%的条件下根和茎的电阻值呈下降趋势;当叶片失水程度在30%以上、根和茎在25%以上时电阻值呈上升趋势,尤其在失水程度60%以上时,电阻值上升趋势加快。容器基质电阻值在失水程度50%以下时缓慢增加;当失水程度超过50%时开始陡增。当失水程度在0%～30%时,茎叶含水量从60.3%上升到73.3%;当失水程度在31%～70%时,从73.3%下降到30.3%。容器基质在水分饱和的情况下,含水量高达220%;而当失水程度为70%时,含水量仅为10%。油茶容器苗在失水程度保持在0%～15%、16%～30%、31%～45%、46%～60%和61%～75%时,苗木成活率分别为100%、92%、75%、25%和0%。The experiment of seedling cultivation was conducted,the resistance value of root,stem,leaf and medium and water contents in leaf and medium under dehydration degree were determined to provide theoretical references for the water scientific management of C.oleifera seedling.The results showed that the resistance value of leaf showed a decreasing trend under 0%-30% of dehydrated degree,and the values of root and stem showed the same trend under 0%-25% of dehydrated degree.On the contrary,the resistance value was increased,especially when dehydration degree was above 60%,the value raised rapidly.When dehydration degree was below 50%,the resistance value of medium was increased slowly,oppositely,the value rised rapidly.Water content was increased from 60.3% to 73.3% when the dehydration degree was 0%-30%,while dehydration degree was 31%-70%,water content was decreased from 73.3% to 30.3 %.The water content in medium reached 220% when dehydration degree was 0%.However,water content was only 10% when dehydration degree was 70%.When dehydration degree was 0%-15%,16%-30%,31%-45%,46%-60% and 61%-75%,the survival rate was 100%,92%,75%,25% and 0% respectively.

关 键 词：油茶容器苗 失水程度 电阻值 含水量 自由水/束缚水 成活率 

分 类 号：S604.3[农业科学—园艺学] S794.4