北京3个园林观赏树种苗木耗水特性初探  

Water consumption and transpiration for seedlings of three ornamental tree species in Beijing

作　　者：车文瑞[1] 马履一[1] 王瑞辉[1] 樊敏[1] 段劼[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《浙江林学院学报》2008年第5期609-613,共5页Journal of Zhejiang Forestry College

基　　金：国家自然科学基金资助项目(30371147);北京市自然科学基金资助项目(6052016);北京林业大学省部共建森林培育与保护教育部重点实验室资助项目(JD100220535);教育部高等学校博士学科点专项科研基金项目(20030022009)

摘　　要：利用Li-6400便携式光合仪和BP-3400天平等仪器,对北京市常用园林观赏乔木白玉兰Magnolia denudata,鹅掌楸Liriodendron chinense和刺槐Robinia pseudoacacia的蒸腾耗水特性进行研究。结果表明:春季的蒸腾速率大于夏季和秋季,3个树种日平均蒸腾速率分别为春季2.32,2.23和1.85 mmol·m-2.s-1,夏季1.61,1.58和1.46 mmol·m-2.s-1,秋季1.67,1.66和1.47 mmol.m-2.s-1;3个树种均为春季耗水型,日平均耗水率分别为春季2.284 6,1.952 9和1.123 7kg·m-2.d-1,夏季1.066 8,0.965 8和0.300 7 kg·m-2.d-1,秋季1.130 0,0.783 7和0.446 6 kg·m-2.d-1;3个树种年平均日耗水率分别为1.493 8,1.234 1和0.623 6 kg·m-2.d-1,由年平均日耗水率可见,3个树种耗水能力由大到小依次为白玉兰、鹅掌楸和刺槐。The objective is to contribute to the theoretical basis for reasonable selection of greening tree species and its water management. Water consumption characteristics due to transpiration for three ornamental tree species; namely Magnolia denudata, Liriodendron chinense, and Robinia pseudoacacia; were systematically studied in Beijing using a Li-6400 Portable Photosynthesis System and BP-3400 precision electronic balance. Results showed that 1 ） the spring transpiration rate of these three trees was higher than summer and autumn; 2） daily water consumption for these species was greatest in spring; and 3） the annual average daily water consumption rates were in the order： M. denudata （1.493 8 kg·m^-2·d^-1） 〉 L. chinense （1.234 1 kg·m^-2·d^-1） 〉 R. pseudoacacia （0.623 6 kg·m^-2·d^-1）. The rate of annual average daily water consumption is important for evaluating the water consumption capability of a tree.[Ch, 4 fig. 1 tab. 19 ref.]

关 键 词：树木生理学 白玉兰 鹅掌楸 刺槐 蒸腾速率 耗水率 北京 

分 类 号：S687[农业科学—观赏园艺] S718.43[农业科学—园艺学]