秋季大叶女贞树干液流径向变化特征  

Radial Variation Characteristics of Sap Flow in the Trunk of Ligustrum lucidum in Autumn

作　　者：刘超[1] 李春友[1] 张劲松[2] 任迎丰 

机构地区：[1]河北农业大学,河北保定071000 [2]中国林业科学研究院林业研究所国家林业局林木培育重点实验室,北京100091 [3]河南省济源市国有大沟河林场,河南济源454650

出　　处：《安徽农业科学》2011年第13期7753-7756,共4页Journal of Anhui Agricultural Sciences

基　　金："十一五"国家林业科技支撑计划专题(2006BAD03A0505)

摘　　要：于2009年9~11月采用热扩散法对大叶女贞树干液流速率径向变化规律进行系统研究。结果表明,秋季大叶女贞树干不同深度液流速率沿边材从外到内呈＂低-高-低＂变化,不同深度液流速率日变化趋势基本相同,20 mm处液流速率最大,30 mm处次之,10 mm处最小;南侧树干液流速率和变化幅度均大于北侧;3种典型天气条件下,大叶女贞树干液流日变化趋势差异显著;太阳辐射、空气温度和相对湿度是影响树干液流的主要气象因子。The radial variation law of velocity of sap flow in the trunk of Ligustrum lucidum in Sep.~Nov.2009 was studied systematically by thermal diffusion method.The results indicated that the velocities of sap flow at different depths in the trunk of L.lucidum in autumn showed ＂low-high-low＂ variation trend from the outside toward the center,the daily variation trends of velocity of sap flow at different depths were same basically,the velocity of sap flow at the depth of 20 mm was highest,that at the depth of 30 mm was secondary and that at the depth of 10 mm was lowest;the velocity of sap flow and its variation extent in the south part of trunk were higher and larger than that in its north part;under 3 typical weather conditions,the daily variation trends of sap flow in the trunk of L.lucidum showed significant difference;solar radiation,air temperature and relative humidity were the main meteorological factors influencing the sap flow in trunk.

关 键 词：大叶女贞 热扩散法 液流速率 径向变化 

分 类 号：S718.43[农业科学—林学]