摘要
2010年6月3-6日,利用热扩散式树干液流探针对北京西山林场刺槐Robinia pseudoacacia树干液流进行连续4 d观测,同时测定环境因子的数据。结果显示,太阳总辐射和土壤温度是影响刺槐树干液流的主要因子,其相关系数排序为:土壤温度>太阳总辐射>风速>空气温度>空气水汽压亏缺>空气相对湿度,其中,只有空气相对湿度与液流呈负相关关系,其他因子均为正相关;刺槐液流存在一定的时滞;与各环境因子的曲线拟合均为三次曲线;同时建立了刺槐树干液流速率与各环境因子的多元回归模型。
Determinations by thermal dissipation probes were conducted from June3of2010to June6on sap flow of Robinia pseudoacacia in Xishan Forest Farm of Beijing,as well as on environmental factors.The results showed that total solar radiation and soil temperature were the main factors to sap flow.The order of correlation coefficient of environment factors was soil temperature>total solar radiation>wind speed>air temperature>vapor pressure deficit>air relative humidity,among them,air relative humidity was negatively correlated with the sap flow,and the others wer positively correlated.Sap flow of R.pseudoacacia had a time-lag.The curve fitting with the environmental factors were cubic curve.The multiple regression models were also established.
作者
蒋丽伟
JIANG Li-wei(Academy of Forestry Investigation and Planning, State Forestry Administration, Beijing 100714, China)
出处
《浙江林业科技》
北大核心
2017年第3期36-42,共7页
Journal of Zhejiang Forestry Science and Technology
关键词
热扩散探针
树干液流
环境因子
刺槐
thermal dissipation probe
sap flow
environmental factors
Robinia pseudoacacia
