水土保持研究2013，Vol.20Issue(3)：167-171,5.
杨树春夏季树干液流与耗水变化规律
Variation of Stem Sap Flow and Water Consumption of Populus in Spring and Summer
摘要
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.关键词
杨树人工林/热扩散法/树干液流/耗水Key words
planted poplar/ thermal dissipation probe/ stem sap flow/ water consumption分类
农业科技引用本文复制引用
李少宁,陈波,鲁绍伟,潘青华,张玉平,王华..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(3):167-171,5.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) （6102005）
