%0 Journal Article
%T Response processes of Aralia elata photosynthesis and transpiration to light and soil moisture.<br>辽东楤木光合和蒸腾作用对光照和土壤水分的响应过程
%A CHEN Jian
%A ZHANG Guang-can
%A ZHANG Shu-yong
%A WANG Meng-jun
%A <br>陈建
%A 张光灿
%A 张淑勇
%A 王梦军
%J 应用生态学报
%D 2008
%I 
%X By using CIRAS-2 portable photosynthesis system, the light response processes of Aralia elata photosynthesis and transpiration under different soil moisture conditions were studied, aimed to understand the adaptability of A. elata to different light and soil moisture conditions. The results showed that the response processes of A. elata net photosynthetic rate (Pn), transpiration rate (Tr), and water use efficiency (WUE) to photon flux density (PFD) were different. With the increasing PFD in the range of 800-1800 micromol x m2(-2) x s(-1), Pn changed less, Tr decreased gradually, while WUE increased obviously. The light saturation point (LSP) and light compensation point (LCP) were about 800 and 30 micromol m(-2) x s(-1), respectively, and less affected by soil water content; while the apparent photosynthetic quantum yield (Phi) and dark respiratory rate (Rd) were more affected by the moisture content. The Pn and WUE had evident threshold responses to the variations of soil water content. When the soil relative water content (RWC) was in the range of 44%-79%, A. elata could have higher levels of Pn and WUE.
%K 辽东楤木
%K 土壤含水量
%K 光合速率
%K 蒸腾速率
%K 水分利用效率
%K 光响应
%K 辽东楤木
%K 净光合速率
%K 蒸腾作用
%K 光照环境
%K 土壤水分
%K 响应过程
%K soil
%K moisture
%K light
%K transpiration
%K photosynthesis
%K elata
%K processes
%K 叶片水分利用效率
%K 土壤相对含水量
%K 高效用水
%K 阈值响应
%K 呼吸速率
%K 量子效率
%K 影响
%K 含水量变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=5AC80D2A2D613FB04CEE7BB111E41947&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=B31275AF3241DB2D&sid=38FD6970749494EF&eid=C9D6A9952042973F&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=2&reference_num=25