%0 Journal Article
%T Comparison of water use efficiency of Zizyphus jujube and Ulmus pumilain semi-arid zones of the Loess Plateau<br>黄土半干旱区枣、榆水分利用效率的比较研究
%A JIN Xin-Hong
%A WANG Bai-Tian
%A GUO Hong-Yan
%A WU Jing
%A LIAO Hang
%A <br>靳新红
%A 王百田
%A 郭红艳
%A 武 晶
%A 廖 行
%J 中国生态农业学报
%D 2009
%I 
%X In semi-arid regions of the Loess Plateau,Zizyphus jujube and Ulmus pumila samples were selected to study the net photosynthetic rate, transpiration rate and stomatal conductance using LI-6400 portable photosynthesis machine under different controlled soil water contents. Net photosynthetic and transpiration rates were observed under controlled solar radiation intensity through shading to determine water use efficiency. The results show obvious differences in the daily processes of net photosynthetic rate between Z. jujube and U. pumila under different soil water contents. The daily range of change in net photosynthetic rate and water use efficiency for Z. jujube is higher than that for U. pumila. Analysis of continuous daily transpiration rates show that soil water is a major influencing factor of evapotranspiration. Z. jujube has a higher water-consumption rate which decreases at high soil moistures. Therefore U. pumila is more suitable to semi-arid conditions of the Loess Plateau regions than Z. jujube .
%K Zizyphus jujube
%K Ulmus pumila
%K Soil water content
%K Loess Plateau
%K Net photosynthetic rate
%K Transpiration rate
%K Evapotranspiration amount
%K Water use efficiency<br>枣树
%K 榆树
%K 土壤含水量
%K 黄土高原
%K 净光合速率
%K 蒸腾速率
%K 蒸散量
%K 水分利用效率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=1806C0989504EA76F4B09C1C7FDC1853&yid=DE12191FBD62783C&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=869807E2D7BED9EC&eid=39EEF47180459690&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=1&reference_num=4