35杨和苏杨7号苗期光合生理特性的比较研究  

Comparison on the photosynthetic characteristics between Populus deltoides L. ‘35 /66' and P. deltoides March. ‘SuYang7' at seedling stage

作　　者：陈庆生[1] 隋德宗[1] 

机构地区：[1]江苏省林业科学研究院,江苏南京211153

出　　处：《江苏林业科技》2013年第4期1-4,共4页Journal of Jiangsu Forestry Science & Technology

基　　金：中央财政林业科技推广示范资金项目"美洲黑杨新品种苏杨7号高效栽培技术推广示范"([2013]TK25)

摘　　要：利用Li-6400对35杨和苏杨7号1年生苗木的光照度响应曲线、CO2响应曲线和光合日变化曲线等光合生理特性进行测定分析,结果表明:35杨和苏杨7号光补偿点分别为33.12,34.85μmol/(m2·s);光饱和点分别为1 308.3,1 286.7μmol/(m2·s);苏杨7号CO2补偿点高于35杨,而最大羧化合速率等其他指标均低于35杨;35杨净光合速率、气孔导度、蒸腾速率呈双峰曲线,而苏杨7号呈单峰曲线;日均光合速率35杨大于苏杨7号。The responses of photosynthesis rate to light intensity and CO2 concentration of the 1-year-old Populous deltoides L. ＇ 35/66＇ and P. deltoides March. ＇ SuYang7 ＇ were measured using Li-6400 portable photosynthesis system. The photosynthetic characteristics of the two clones were compared. The results showed the light compensation points （LCP） of the two clones were 33.12 p, mol/（ m2 . s） and 34.85 μmol/（ m2 . s） ,the light saturation points（LSP） were respectively 1 308.3 μ mol/（m2 . s）and 1 286.7 p, mol/（m2 . s）. The CO2 compensation points（CCP） of Populus deltoides L. ＇35/66＇ was lower than that of P. deltoides March. ＇ SuYang7＇. The net photosynthetic rate, the rate of foliar transpiration and stomatal conductance of Populus deltoides L. ＇ 35/66＇ changed in a double-peak curve while those of P. deltoides March. ＇ SuYang7 ＇ changed in a single-peak curve.

关 键 词：35杨 苏杨7号 光合特性 净光合速率 

分 类 号：S792.11[农业科学—林木遗传育种] Q945.11[农业科学—林学]