中国水土保持科学2012，Vol.10Issue(3)：105-110,6.
不同土壤水分条件下栾树光合作用的光响应
Light response of photosynthesis of Koelreuteria paniculata Laxm.under different soil water conditions
摘要
Abstract
The light responses of photosynthesis of Koelreuteria paniculata Laxm. were studied under 4 different soil water conditions, and the light response curves of photosynthesis were fitted and analyzed by rectangular hyperbola model, non-rectangular hyperbola model and a modified model based on rectangular hyperbola model. Then the best model for Koelreuteria paniculata Laxm. was selected. Photosynthetic characteristic were studied under different soil water conditions and different light intensity. The results show that: 1) The light response of photosynthesis were well fitted by the three models, and the modified rectangular hyperbola model could well fit light response of photosynthesis of photo-inhibition. Non-rectangular hyperbola model and modified rectangular hyperbola model is better than rectangular hyperbola model. 2) Koelreuteria paniculata Laxm. had strong adaptability to soil water and light conditions. Higher photosynthetic rate (Pn) and apparent quantum yield ( Φ) were observed in the region where the relative soil water contents (RWc ) were from 41. 5% to 93. 3% . Higher Pn and water use efficiency ( WUE ) were observed in the region where the photosynthetic active radiation ( PAB ) were from 600 to 2 000 μmol/(m2-s).关键词
栾树/土壤水分/光合作用光响应/光响应模型/蒸腾作用/水分利用效率Key words
Koelreuteria paniculata Laxm. / soil water content/ light response of photosynthesis/ light response model/ transpiration/ water use efficiency引用本文复制引用
陈志成,王荣荣,王志伟,杨吉华,王华田,耿兵,张永涛..不同土壤水分条件下栾树光合作用的光响应[J].中国水土保持科学,2012,10(3):105-110,6.基金项目
世界银行贷款山东省生态造林项目“干旱瘠薄山地树种及造林模式选择研究”(SEAP-KY-1) （SEAP-KY-1）
