高温干旱季节遮阳网覆盖对茶园温湿度和茶树生理的影响  

Effects of covering with outer shading screens during hot-dry season in tea plantation

作　　者：肖润林[1] 王久荣[1] 汤宇 刘永胜[1] 彭晚霞[1] 宋同清[1] 

机构地区：[1]中国科学院亚热带农业生态研究所,长沙410125 [2]长沙县湘丰茶厂,长沙410158

出　　处：《生态学杂志》2005年第3期251-255,共5页Chinese Journal of Ecology

基　　金：中国科学院知识创工程新项目(KZCX2SW415);中国科学院重点资助项目(NK十五D15)

摘　　要：研究了高温干旱季节采用遮阳网覆盖红壤丘陵茶园的生态作用和对茶树生理的影响。与露地对照茶园相比 ,遮阳网覆盖处理茶园在高温干旱季节 ,各个观测时段的气温、树冠温度、叶面温度、地面温度和土壤温度均明显降低 ,茶园土壤水分含量、空气湿度和茶叶含水量明显提高 ,茶叶新梢的叶绿素、咖啡碱和氨基酸含量大幅度提高 ,茶多酚含量降低 11. 6 %。连续高温干旱 2 7～ 2 9d后遮阳网覆盖下茶树的叶片气孔导度、蒸腾速率和净光合速率均明显高于露地对照茶园。Effects of outer shading screens on tea ecology and physiology in red soil hilly region were studied.The results showed that when the tea plantation was covered with outer shading screens during the hot-dry season,the temperatures of atmosphere,tea crown,tea leaf surface,soil surface and soil at every observational time were lower apparently than those of tea plantation without screens.The soil water content,atmosphere humidity and leaf water content in tea plantation with screens were much higher; and the contents of chlorophyll,caffeine and amino acids increased significantly while the polyphenol content decreased by 11.6%.After 27～29 days of continuous hot-dry weather,the transpiration rate,stomatal conductance and net photosynthetic rate of tea with screens were obviously higher than those of tea plantation without screens.

关 键 词：高温干旱 茶园 遮阳网 生态效应 净光合速率 

分 类 号：S571.1[农业科学—茶叶生产加工]