摘要
为了全面了解各绿化树种的生理生态特性,增加哈尔滨市园林绿化树种及其生态功能的多样性,为绿化树种的选择提供理论依据。对东北乡土树种白桦、蒙古栎、糠椴、紫椴、茶条槭和黄檗二年生幼苗的生理指标进行测定,通过这6种树种生理指标的研究,对各树种的适宜应用作综合的评价分析,结果表明:这6树种最大光合速率分别为:茶条槭9.70μmolCO2/m2.s,白桦7.67μmolCO2/m2.s,黄檗5.88μmolCO2/m2.s,紫椴5.51μmolCO2/m2.s,糠椴5.20μmolCO2/m2.s和蒙古栎4.04μmolCO2/m2.s。6树种之间呼吸速率的差异不显著,平均为1.01μmolCO2/m2.s。水分利用效率的种间差异较大,茶条槭、糠椴和蒙古栎高于黄檗、紫椴和白桦。所以从生态园林的角度,在水分短缺的地点,选择绿化树时应先考虑水分利用效率高的茶条槭、糠椴和蒙古栎,而在土壤水分条件较好的可适当优先考虑净光合能力强的树种。
In order to comprehensively understand the eco-physiological characteristics of greening tree species,increase the diversity of the garden greening trees and their ecological function,and provide the scientific basis for choosing the greening trees species in Harbin,the physiological indexes of six species,Betula platyphylla Suk.,Quercus mongolica Fisch.ex Turcz.,Tilia mandshurica Rupr,Tilia amurensis Rupr.,Acer ginnala Maxim.,and Phellodedron amurense Rupr.were measured in this paper.According to the physiological indexes of the six species,the rational utilization of these species was analyzed and evaluated.The results showed that the values of maximum photosynthetic rate（Pmax） of the six species were 9.70 μmolCO2/m^2·s for Acer ginnala Maximum,7.67 μmolCO2/m^2·s for Betula platyphylla Suk.,5.88 μmolCO2/m^2·s for Phellodedron amurense Rupr.,5.51 μmolCO2/m^2·s for Tilia amurensis Rupr.,5.20 μmolCO2/m^2·s for Tilia mandshurica Rupr.,and 4.04 μmolCO2/m^2·s for Quercus mongolica Fisch.ex Turcz..The respiration rates among six tree species had not significant difference with an average of 1.01 μmolCO2/m^2·s.The interspecies variations of water use efficiency（WUE） were significant,and the WUE of Acer ginnala Maxim.,Tilia mandshurica Rupr,and Quercus mongolica Fisch.ex Turcz.were higher than those of Phellodedron amurense Rupr.,Tilia amurensis Rupr.and Betula platyphylla Suk..Therefore,from the point of the ecological gardening,the trees with high WUE such as Acer ginnala Maxim.,Tilia mandshurica Rupr,and Quercus mongolica Fisch.ex Turcz.should be firstly considered when selecting the greening trees rooted in the soil with low water content,and the trees with high photosynthetic capacity could be properly firstly considered rooted in the soil with high water content.
出处
《森林工程》
2008年第3期6-9,共4页
Forest Engineering
基金
国家自然科学基金(30471372)
关键词
绿化树种
光合速率
水分利用效率
greening tree species
photosynthetic rate
water use efficiency
