灌溉排水学报2012，Vol.31Issue(6)：121-125,5.
不同时间尺度下杨树人工林液流密度特征
Characteristics of Stem Sap Flow Density of Poplar Plantation in Different Temporal Scales
摘要
Abstract
Abstract: Adopting thermal dissipation probe (TDP) combined with continuous observation of automatic weather station (HOBO), continuous observation of sap flow of PopulusX eurarnericanacv. "74/76" Artificial Poplar Sand and the environment over 1-year period (January 2011-December 2011) in Daxing Forest, Yufa Town, Daxing District, Beijing was conducted, The results showed that sap flow density of poplar was not obvious at night. The diurnal variation of sap density fitted a single peak curve. Typical sunny days of change mean value was 5.61 cm^3/(cm^2 · h). Sap flow density changed in different weather conditions as follow sunny(15.18 cm^3/(cm^2 · h)cloudy(10. 65 cm^3/(cm^2 · h))〉rain day(4. 78cm^3/(cm^2 · h)). The changes in sap flow density of different months showed a single peak curve. Seasonal changes of sap density were as follows, summer(13.44 cm^3/(cm^2 · h))〉autumn(11.47 cm^3/(cm^2 · h))〉spring(6.8 cm^3/(cm^2 · h)). The poplar in North China and Beijing was an appropriate tree, and the right amount of irrigation, transpiration peak and stagnation without irrigation were recommended to reduce water consumption.关键词
杨树人工林/热扩散法/时间尺度/液流密度Key words
artificial poplar forest/thermal dissipation probe temporal scale sap flow density分类
农业科技引用本文复制引用
李少宁,陈波,鲁绍伟,张玉平,潘青华,王华..不同时间尺度下杨树人工林液流密度特征[J].灌溉排水学报,2012,31(6):121-125,5.基金项目
基金项目：北京市自然科学基金项目 （）
