江西农业大学学报2017，Vol.39Issue(2)：349-356,365,9.DOI:10.13836/j.jjau.2017045
樟树树干液流特征及其与气象因子的相关性研究
A Study on the Rule of Sap Flow in Camphor Tree and Its Relation to Meteorological Factors
摘要
Abstract
In order to understand and master the mechanism of evaportranspiration of camphor trees aiming at making better use of water,the rule of sap flow in camphor tree was analyzed through the experimental data,which were measured by thermal dissipation sap flow sensor,SF-L sensor in every 30 minutes,combined with the corresponding meteorological factors in the analysis of the rule of the correlations between camphor tree sap flow and meteorological factors was carried out.The results showed that:(1)the sap flow in camphor tree changed timely.The diurnal gross sap flow per unit sapwood in July and August was the highest,then there was a decrease trend since September and it reached its minimum in January,and then rose again till April.It demonstrated a single-peak curve in sunny days and a multimodal distribution or irregular change in overcast and rainy days.The monthly-average diurnal variations reached the highest in July and the lowest in January and went up in March and April.(2)The sap flow velocity of camphor tree in the daytime had a significantly positive correlation with VPD,solar radiation and temperature,and a negative correlation with related humidity while there was no significant correlation with precipitation.At night,the sap flow velocity of camphor tree showed no significant correlation with solar radiation,wheras the correlation with the other factorswas the same as in the daytime.The correlation coefficients turned out to be higher in the daytime than at night,and higher in the growing seasons than in the non-growing seasons.关键词
液流/相关性/气象因子/樟树Key words
sap flow/correlation/meteorological factors/camphor tree分类
农业科技引用本文复制引用
秦奔奔,景元书..樟树树干液流特征及其与气象因子的相关性研究[J].江西农业大学学报,2017,39(2):349-356,365,9.基金项目
国家自然科学基金项目(41575111,41175098)和第九批"六大人才高峰"高层次人才项目(NY-038) Project supported by the National Natural Science Foundation of China(41575111,41175098)and the Ninth Batch of "Six Talent Peaks" High-profile Talent Project(NY-038) （41575111,41175098）
