吉林省西部不同造林密度杨树耗水特性的研究  

Water consumption characteristics of poplar under varied afforestation density in western Jilin Province,northeastern China

作　　者：杨爱国[1] 张建秋[1] 毕庆玲[1] 张玉玲[1] 王凤林[1] 范鹏辉[1] 

机构地区：[1]吉林省白城市林业科学研究院

出　　处：《北京林业大学学报》2011年第6期142-145,共4页Journal of Beijing Forestry University

基　　金：吉林省科技发展计划项目(20112118)

摘　　要：为了探讨吉林西部地区合理的杨树造林密度,采用径流仪对不同造林密度的"白城杨--2"人工试验林的耗水特性进行了观测,同时利用微型气象站同步记录环境因子。结果表明:不同密度的杨树液流在生长季晴天的日变化呈不规则单峰曲线,与太阳辐射、温度和风速具有较好的生态学同步性;从单位面积蒸腾耗水量与单位面积降水量以及单位面积水分利用率的角度分析,可初步确定杨树人工林栽植密度在5m×5m与6m×6m之间比较合理。In order to explore the reasonably afforestation density of Populus in western Jilin Province,we investigated water consumption characteristics of Populus simonii×P.nigra var.italica using stem sap flow determining system and environmental factors using automatic weather station.Results showed that the diurnal variation of different density poplar＇s sap flux density presented a single irregular peak curve in sunny day of growing season,and had a good ecological synchronization with solar radiation temperature and wind velocity.Through the analysis of transpiration water consumption,rainfall and water use efficiency for each unit area,it can be initially confirmed that the planting density of poplar artificial forests ranging from 5 m×5 m to 6 m×6 m is reasonable.

关 键 词：白城杨--2 树干液流 环境因子 蒸腾耗水 

分 类 号：S725.6[农业科学—林木遗传育种]