天山中段雪岭云杉树干液流变化及其与气象因子的关系  

Sap flow of Picea schrenkiana and its responses to metrological factors in the middle area of Tianshan Mountain,China

作　　者：吉春容[1] 邹陈[1] 范子昂[1] 李新建[1] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所/中国气象局树木年轮理化研究重点开放实验室/新疆维吾尔自治区树木年轮生态重点实验室,乌鲁木齐830002

出　　处：《干旱区资源与环境》2013年第12期119-123,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(41071072);国家科技支撑计划项目(2012BAC23B01);中国沙漠气象科学研究基金(Sqj2010001)共同资助

摘　　要：运用热扩散式探针和自动气象站对雪岭云杉树干液流密度及气象因子进行了同步观测,研究雪岭云杉树干液流密度变化特征及其与气象因子的关系。结果表明:树干液流密度日变化随着太阳辐射出现周期性;晴-多云天气下液流密度呈单峰曲线变化趋势;阴雨天呈多峰曲线,与晴-多云天气相比液流密度较低且升幅较小。树干液流密度夜间变化平缓,不论晴天还是阴雨天夜间仍存在一定液流。气象条件对云杉树干液流存在显著影响(P<0.05),光合有效辐射强度为影响雪岭云杉树干液流的主导因子。Sap flow density of picea schrenkiana was continuously measured with thermal dissipation probe.In the meantime,several metrological factors were monitored at a nearby automatic weather station.The results showed that the diurnal variation of stem sap flux density was a cyclical with the solar radiation.It showed a single peak type in the clear-cloudy or overcast weather day,and several-peak type in the rainy day.Comparing with in the clear-cloudy or overcast weather day,the sap flow density was lower and showed a smaller change range.The sap flow changed slightly and was exist in night,whether it was in clear-cloudy day or rainy day.It indicated that the metrological factors played important roles in affecting sap flow density of picea schrenkiana.The multi-linear regression analysis showed that sap flow density was significantly positive related with temperature or photosynthetic active radiation,and was significant negative correlation with air relative humidity（P0.05）.

关 键 词：雪岭云杉 液流密度 气象因子 

分 类 号：Q948.11[生物学—植物学]