四个杨树品系夏季光合作用日变化  

A study on diurnal variation of photosynthesis in four Populus strains

作　　者：闫年[1] 吴文友[1] 刘桂华[1] 张栋[1] 项艳[1] 

机构地区：[1]安徽农业大学,合肥230036

出　　处：《林业科技开发》2011年第2期48-52,共5页China Forestry Science and Technology

基　　金：国家科技支撑计划子课题(编号:2009BADA6B06-1);安徽省科技攻关重大专项(编号:08010302073)资助

摘　　要：树种(品系)选择和栽培措施的制定是农田防护林建设的重要内容。通过对‘I-69’、‘I-72’、‘I-63’、‘南林895’这4个在沿淮地区防护林建设中得到广泛应用的杨树品系的光合指标进行测定和分析。结果表明:从光合能力的差异来看,无论是日最大净光合速率还是日均净光合速率4,个品系中的排列顺序都是:‘南林895’>‘I-69’>‘I-63’>‘I-72’。这说明‘南林895’较其他3个品系具有较强的光合能力;从影响光合作用的有关生理生态因子来看,4个品系的光合能力强弱与蒸腾作用、叶表面温度、细胞间CO2浓度、气孔导度等生理生态因子都存在一定的相关性,并且在各生理生态因子中蒸腾速率对4个杨树品系光合作用的影响最为显著,其次是叶面温度,而细胞间CO2浓度和气孔导度对光合作用的影响相对较小。通过对这些光合生理学特性的分析,为沿淮地区农田防护林的建设提供一定的理论依据。The selection of species（strain） and the development of cultivation measures is an important part for establishing farmland shelterbelt.In this study,we selected four Populus strains（＇I-69＇、＇I-72＇、＇I-63＇ and ＇Nanlin 895＇）,which have been widely planted in the Huaihe River,to analysis their photosynthetic characteristics.The results showed that： Whether maximum net photosynthetic rate in a day or daily average net photosynthetic rate,The photosynthetic capacity in four strains could be arranged from high to low as： ＇Nanlin 895＇＇I-69＇＇I-63＇ ＇I-72＇.This indicated that ＇Nanlin 895＇ had strong photosynthetic capacity compared with other strains;Concerning the impact of physiological and ecological factors on photosynthesis,the net photosynthetic rate of four strains had a certain correlation with the transpiration rate,intercellular CO2 concentration,leaf surface temperature and stomatal conductance.Among them,the most significant factor was transpiration rate,the next was leaf surface temperature.The influence of intercellular CO2 concentration and stomatal conductance was relatively small.Through the analysis of photosynthetic and physiological characteristics,a theoretical basis for the construction of farmland shelterbelt along the Huaihe River was provided.

关 键 词：杨树品系 光合作用 日变化 

分 类 号：S792.11[农业科学—林木遗传育种]