天山北坡4种栽培杨树的功能性状分析  

Analysis on Plant Functional Traits of Populus Species in the Tianshan Mountains

作　　者：徐庆华[1] 臧润国[1] 谢怀慈 白志强[3] 郭仲军[3] 赵玲 

机构地区：[1]中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室,北京100091 [2]新疆林业科学研究院森林生态研究所,新疆乌鲁木齐830000 [3]内蒙古巴彦淖尔市林业科学研究所,内蒙古015000 [4]新疆林业规划设计院,新疆乌鲁木齐830001

出　　处：《干旱区研究》2012年第3期425-431,共7页Arid Zone Research

基　　金：林业公益性行业科研专项(200704016);中央级公益性科研院所基本科研业务费专项资金(CAFRIF200716,CAFYBB2007040)

摘　　要：植物功能性状可以用来推断植物生活史策略,反映生态系统功能。为了研究天山北坡4种栽培杨树适应环境的生态策略差异,对其主要功能性状进行比较分析。结果表明,4种杨树的叶片大小、叶片厚度、叶干物质含量、茎皮厚度、木材密度和根、茎、叶全N,P,K含量均差异显著;但4种杨树间比叶面积差异不显著;新疆杨单叶面积和干物质量最大,胡杨叶片厚度和木材密度最大,钻天杨茎皮厚度最大;4种杨树的叶片N含量均显著高于茎和根,茎和根的N和P含量差异均不显著,除胡杨外,其他3种杨树叶片P含量均显著高于茎和根,K含量在4种杨树的根、茎、叶器官中表现不一致;钻天杨根、茎、叶的N,P,K养分含量都相对较高,俄罗斯杨的根、茎、叶的N,P,K养分含量都相对较低。4种杨树功能性状不同反映了植物对环境的适应性差异。Plant functional traits can help us to deduce plant life history strategies and enhance our understanding to ecosystem functions. In order to study the ecological strategies of adapting environment of 4 Populus species in north slope of the Tianshan Mountains, the differences in functional traits of leaves, stems and roots among Populus alba, P. nigra, P. russkii and P. euphratica were researched. The results show that the leaf size, leaf thickness, leaf dry matter content, stem tegument thickness, wood density and nutrition content of organs were significantly different among the 4 species, but the difference of specific leaf area was not significantly. Among the 4 species, both leaf area and leaf dry matter content of P. alba were the highest, both leaf thickness and wood density of P. euphratica were the highest, and stem tegument thickness of P. nigra was the highest. Content of N in leaves of the 4 species was higher than that in stems and roots, the difference of N and P contents between stems and roots was not significant, contents of K in leaves, stems and roots of the 4 species were quite different; except P. euphratica, content of P in leaves was higher than that in stems and roots ; contents of N, P and K in P. nigra were the high- est, but those in P. russkii were the lowest. Variation of the functional traits of the 4 Populus species reflected their adaptation to environment.

关 键 词：杨树 功能性状 生活史 生态策略 天山北坡 新疆 

分 类 号：S792.11[农业科学—林木遗传育种]