Study on the Function of Decreasing Temperature and Increasing Humidity of 7 Kinds of Economic Forest Tree species
LI Shaoning
ZHAO Yunge
DING Jie
LIU Bin
CHEN Bo
LU Shaowei
Abstract：In order to explore the cooling capacity of forest tree species,the study was conducted to determine the photosynthetic indexes of 7 common economic forests (apple-Malusdomestica,peach-Amygdalus persica L.,apricotArmeniaca vulgaris Lam.,cherry-Prunus pseudocerasus,pear-Pyrus spp,jujube-Ziziphus jujuba Mill.and walnutJuglansregia) in Beijing from May to October,and calculate the daily transpiration,daily water release and daily heat absorption,and the results showed that the diurnal variation of transpiration rate per unit leaf area of various economic forest species in different months was basically as the change trend of 7:00-17:00 first increased and then decreased,and the biggest value appeared at 11:00-13:00.Daily transpiration of all trees was Pyrus spp (78.26 mol H2O/(m2·d))＞ Ziziphus jujuba Mill.(67.71 mol H2O/(m2· d))＞ A rmeniaca vulgaris Lam.(64.46 mol H2O/(m2· d)) ＞ Amygdalus persica L.(57.81 mol H2O/(m2·d))＞ Juglansregia (49.21 mol H2O/(m2·d))＞ Prunus pseudocerasus (47.18 mol H2O/(m2·d))＞ Malusdomestica (44.91 mol H2O/(m2 ·d)).The economic forest tree species of cooling and humidifying capacity and daily transpiration quantity of the same sort and monthly variation showed September and October is weak,June and July appear significantly increased,temperature drop of mean number between 0.13～0.23 ℃,release water mean between 808.38～1 408.75 g/(m2· d).
Keywords：economic forestdecreasing temperaturehumidificationtranspiration rate
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 62-67 )