%0 Journal Article
%T The changes of photosynthetic rate and transpiration rate of maize seedling under soil progressive drought<br>土壤逐渐干旱下玉米幼苗光合速率与蒸腾速率变化的研究
%A ZHANG Wen-Li
%A ZHANG Tong
%A WU Dong-Xiu
%A ZHANG Sui-Qi
%A SHAN Lun
%A <br>张文丽
%A 张 彤
%A 吴冬秀
%A 张岁岐
%A 山 仑
%J 中国生态农业学报
%D 2006
%I 
%X The changes of photosynthetic rate(Pn),transpiration rate(Tr) and water use efficiency(WUE) of maize seedlings under soil progressive drought were studied.The results show that photosynthetic rate and transpiration rate increase a little with the declining of soil water content during the early drought days.When soil moisture is 90% of field water capacity(FWC),they both reach the maximum.Then they begin to decrease with unceasing drought.The rate of decreasing is slow at first,but when soil moisture is below 70% of FWC,it decreases linearly with decreasing soil water.The changes are caused synthetically or alternately by stomatal and non-stomatal factors.Leaf water potential-0.8MPa is an important threshold in enhancing photosynthetic rate and water use efficiency.
%K Progressive drought
%K Photosynthetic rate(Pn)
%K Transpiration rate(Tr)
%K Water use efficiency(WUE)<br>逐步干旱
%K 光合速率
%K 蒸腾速率
%K 水分利用效率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=87A6E80E9F51B2CB&yid=37904DC365DD7266&vid=F3583C8E78166B9E&iid=0B39A22176CE99FB&sid=AA76E167F386B6B3&eid=80A07035DF96B0C4&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=5&reference_num=14