不同土壤水分对茶树光合作用与水分利用效率的影响  

Photosynthetic characteristics and water use efficiency of tea plant under different soil moisture condition

作　　者：郭春芳[1,2] 孙云[3] 张木清[1] 

机构地区：[1]福建农林大学农业部甘蔗生理生态与遗传改良重点开放实验室,福建福州350002 [2]福建教育学院,福建福州350025 [3]福建农林大学园艺学院,福建福州350002

出　　处：《福建林学院学报》2008年第4期333-337,共5页Journal of Fujian College of Forestry

基　　金：福建省自然科学基金资助项目(B0510025);福建省教育厅科技计划基金资助项目(JA05333)

摘　　要：研究了不同土壤水分条件下茶树(铁观音和福鼎大白茶)光合作用及其水分利用效率(WUE)的变化。结果表明,不同土壤水分处理对茶树净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、WUE等生理指标及其日变化均产生明显影响;水分胁迫下茶树的Pn、Tr、Gs都下降,WUE日平均值的降幅比Pn的小。生长在同一生境中的铁观音对土壤水分的生态适应能力高于福鼎大白茶。The seedlings of tea plants （Camellia sinensis ＂Tieguanyin＂ and C. sinensis ＂Fudingdabaicha＂） were gown in pots to study the effects of different soil moisture conditions on the photosynthetic characteristics and water use efficiency. The results showed that net photosynthetic rate （Pn）, transpiration rate （Tr）, stomata1 conductance （Gs） and water use efficiency, （WUE） of the tea plants and their diurnal variations were all significantly different under four soil moisture conditions. Pn, Tr and Gs were decreased, and the decrease in daily mean of WUE is less than that of Pn under the stress of soil moisture. The results showed that C. sinensis ＂Tieguanyin＂ had higher capacity to acclimate different soil water supply than C. sinensis ＂Fudingdabaicha＂ grown under the same habitat type.

关 键 词：茶树 土壤水分 光合作用 水分利用效率 

分 类 号：S571.1[农业科学—茶叶生产加工]