%0 Journal Article
%T Photosynthesis rate in response to light intensity and CO2 concentration in different alfalfa varieties<br>不同苜蓿(Medicago sativa L.)品种光合速率对光和CO2浓度的响应特征
%A DONG Zhi-Xin
%A HAN Qing-Fang
%A JIA Zhi-Kua
%A REN Guang-Xin
%A <br>董志新
%A 韩清芳
%A 贾志宽
%A 任广鑫
%J 生态学报
%D 2007
%I 
%X The response of photosynthesis rate to light intensity and CO2 concenrtration in 6 varieties were measured with Licor-6400 in the sixth year after being planted. The results indicated that exponential equation was fitted for these responses. Characteristic parameters calculated from those exponential equations were found to differ significantly among different varieties. Two of the varieties, Ameristand201+ Z and Lobo, may possess high yield potential as they displayed higher light saturation estimate (Lk), apparent quantum yield (AQY), carboxylation efficiency(CE) and lower CO2 compensation point(CCP), compared with the remaining varieties. Fall dormancy level had negative correlations with AQY, CE, light compensation point(LCP), Lk, dark respiration rate(Rd ) and photorespiration rate (Rp), while insignificant positive correlation was observed with CCP and CO2 saturation point(CSP ).
%K alfalfa
%K response curves
%K exponential equations<br>紫花苜蓿
%K 响应曲线
%K 指数方程
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=6BE99FC264261B8A&yid=A732AF04DDA03BB3&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=6AC4A3AFEFBBEB5D&eid=7D27873F452C34BDB7E27C14B3B7018C&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=27