不同品种楸树幼树生长及生理特性比较  

Comparative investigation of the growth and physiology characteristics for different Catalpa spp.saplings

作　　者：吴春林[1] 郝明灼[2] 彭方仁[2] 杜旭华[2] 朱振贤[2] 

机构地区：[1]南京林业大学实习林场,江苏镇江212414 [2]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2008年第6期123-127,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"十一五"科技支撑项目(2006BAD24B08);江苏省农业科技攻关项目(BE2005368);江苏省农业三项工程项目(SX(2005)118)和(SX(2006)001)

摘　　要：对低山丘陵地造林的7个品种楸树2年生幼树的生长和生理特性进行了研究。结果表明:不同品种楸树幼树的高生长、直径生长、叶片长宽比、单株叶片数和净光合速率等生长和生理指标存在显著差异。直径生长速率与叶长、叶片长宽比、蒸腾速率和净光合速率呈显著的正相关;叶片宽度与蒸腾速率和净光合速率呈显著的负相关;光化学猝灭qp与非光化学猝灭(NPQ)呈极显著的正相关,与实际光化学效率ΦPSⅡ呈极显著的负相关。The growth and physiology characteristics for two-year-old saplings of 7 Catalpa spp. planted in upland area were studied. The results showed that different Catalpa spp. had significant variance in height, diameter, length to width of leaf, leaf numbers per plant and net photosynthesis rate. Diameter growth rate had significant positive correlation with leaf length, length to width of leaf, transpiration rate and net photosynthesis rate. Leaf width had significant negative correlation with transpiration rate and net photosynthesis rate. Photochemistry quenching （qp） had significant positive correlation with non-photochemistry quenching （NPQ） and significant negative correlation with φPSⅡ photochemical efficiency.

关 键 词：楸树 幼树生长 光合作用 叶绿素荧光 

分 类 号：S723.1[农业科学—林木遗传育种]