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沙棘果期茎干液流变化特征及其与气象因子的关系     被引量:7

Sap flow variation characteristics and its relationship with meteorological factors for Hippophae rthamnoides at fruit period

文献类型:期刊文献

中文题名:沙棘果期茎干液流变化特征及其与气象因子的关系

英文题名:Sap flow variation characteristics and its relationship with meteorological factors for Hippophae rthamnoides at fruit period

作者:辛智鸣[1,2] 黄雅茹[1,2] 罗凤敏[1,2] 葛根巴图[1,2] 李新乐[1,2] 孙非[1,2] 郝玉光[1,2]

第一作者:辛智鸣

机构:[1]中国林业科学研究院沙漠林业实验中心,磴口015200;[2]国家林业局,内蒙古磴口荒漠生态系统定位研究站,磴口015200

年份:2015

卷号:0

期号:11

起止页码:202-207

中文期刊名:干旱区资源与环境

外文期刊名:Journal of Arid Land Resources and Environment

收录:北大核心:【北大核心2014】;CSSCI:【CSSCI2014_2016】;CSCD:【CSCD_E2015_2016】;

基金:中国林业科学研究院沙漠林业实验中心创新研发基金项目"乌兰布和沙漠沙生灌木油蒿水分利用规律研究";国家自然基金项目"白刺叶形态变化对水分利用的优化调控"(31200536)资助

语种:中文

中文关键词:茎流;沙棘;气象因子;乌兰布和沙漠

外文关键词:sap flow; Hippophae rthamnoides; meteorological factors; Ulan Buh Desert

分类号:Q945

摘要:利用TDP茎流测量系统和自动气象站对乌兰布和沙漠沙棘的液流变化及其周围的环境因子进行观测。结果表明:1)沙棘的茎干液流速率呈多峰曲线;液流启动时间为8:00,在10:30左右达到峰值,峰值大小为292.31-309.39g/h,至21:30基本下降到了极低值,夜间有明显的液流活动。2)沙棘茎干液流与直径呈正相关,直径为8.8cm和10.5cm的沙棘日累计液流量分别为14150.28g和17123.73g。3)沙棘白天液流速率变化趋势与环境因子变化趋势相吻合。相关性分析结果表明,影响沙棘液流速率的主要因子为空气相对湿度、空气温度、太阳总辐射以及风速。
In this study,the sap flow of Hippophae rthamnoides and their affecting meteorological factors in the Ulan Buh desert were tested and observed by using the TDP sap flow testing system and automatic meteorological station. The results were as follows:( 1) The daily variation curve of sap flow velocity in Hippophae rthamnoides stem was in a multimodal distribution; the sap flow starts at 8: 00,and up to the highest around 10: 30,its value varied in a range of 292. 31 - 309. 39 g / h,then dropped to the lowest around 21: 30,and the sap flow also flowed at night.( 2) The sap flow velocity in Hippophae rthamnoides stem positively correlated with diameter.( 3) The daily trend of sap flow velocity accorded with that of environmental factors. The correlation analysis revealed that the air relative humidity,air temperature,effective solar radiation and wind speed affected the variation of sap flow in Hippophae rthamnoides.

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