[1]李少宁,陈波,鲁绍伟,等.杨树春夏季树干液流与耗水变化规律[J].水土保持研究,2013,20(03):167-171.
　LI Shao-ning,CHEN Bo,LU Shao-wei,et al.Variation of Stem Sap Flow and Water Consumption of Populus in Spring and Summer[J].Research of Soil and Water Conservation,2013,20(03):167-171.
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杨树春夏季树干液流与耗水变化规律

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 20 期数: 2013年03期 页码: 167-171 栏目: 出版日期: 2013-06-28
Title:
Variation of Stem Sap Flow and Water Consumption of Populus in Spring and Summer
作者:
李少宁1, 陈波2, 鲁绍伟1, 潘青华1, 张玉平1, 王华1
1. 北京市农林科学院 林业果树研究所, 北京 100093;
2. 河北农业大学 林学院, 河北 保定 071000
Author(s):
LI Shao-ning1, CHEN Bo2, LU Shao-wei1, PAN Qing-hua1, ZHANG Yu-ping1, WANG Hua1
1. Forestry and Pomology Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China;
2. College of Forestry, Agricultural University of Hebei, Baoding, Hebei 071000, China
关键词:
杨树人工林; 热扩散法; 树干液流; 耗水
Keywords:
planted poplar; thermal dissipation probe; stem sap flow; water consumption
分类号:
S715.4
摘要:
以北京市大兴区榆伐镇大兴林场沙地杨树人工林107欧美杨（Populus×euramericanacv.“74/76”）为研究对象，采用热扩散式探针（TDP）结合HOBO自动气象站，于2011年3—7月对杨树树干液流及林地环境因子进行连续观测。结果表明：杨树春夏季边材液流的日变化均呈单峰曲线，夏季液流每天启动的时间早于春季3 h左右，达到峰值的时间晚于春季1 h左右，迅速下降的时间晚于春季2 h左右，峰值和日平均液流速率小于春季；3—7月的月平均液流通量介于5.31~51.31 cm3/h；平均液流通量夏季（47.92 cm3/h） >春季（35.72 cm3/h）；日耗水量随胸径的增大而增加，与树干胸径和边材面积的相关性达极显著水平（p < 0.01），相关系数分别为0.956和0.984。杨树边材液流速率和液流通量的季节变化说明杨树夏季蒸腾量大，是水分管理的关键时期。
Abstract:
The environmental factors and stem sap flow dynamics of planted poplar (Populus×euramericanacv. “74/76”) were investigated through March to July 2011 with thermal dissipation probe (TDP) and the data from automatic weather station (HOBO). Results showed that the daily changes of sap flow exhibited single peak pattern both in spring and summer. Daily sap flow started 3 h earlier in summer than in spring, reached peak 1 h later in summer than in spring, and rapid decrease was 2 h later in summer than that in spring. Both maximum and average values of sap flow velocity were lower in summer than that in spring. Monthly sap flow velocity varied between 5.31 cm3/h and 51.31 cm3/h from March to July. The average sap flow (47.92 cm3/h) was higher in summer than that in spring (35.72 cm3/h). Daily water consumption significantly correlated with trunk diameter at breast height and sapwood area with the correlation coefficients of 0.956 and 0.984, respectively. Seasonal sap flow variation of poplar indicated that summer was the key period for water management due to high transpiration.

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备注/Memo

收稿日期:2012-09-18;改回日期:2012-11-12。
基金项目:北京市自然科学基金项目“北京沙地杨树人工林生态系统水分利用研究”（6102005）
作者简介:李少宁(1975-),男,河北滦县人,博士,副研究员,主要研究方向:生态功能监测与评价。E-mail:lishaoning@126.com
通讯作者:陈波(1987-),男,甘肃张掖人,在读硕士,主要研究方向:水土保持与生态水文。E-mail:zhyechb2010@163.com

更新日期/Last Update: 1900-01-01