几个经济树种蒸腾作用对连续土壤水分变化过程的响应  

Characteristics of Transpiring Water-consumption of Seedlings under Continuous Soil Water Change

作　　者：董玉峰[1] 张恒 韩俊[3] 杨静[1] 谭秀梅[1] 王华田[1] 

机构地区：[1]山东农业大学林学院,山东泰安271018 [2]山东潍坊市林业局,山东潍坊261041 [3]山东邹城市林业局,山东邹城273500

出　　处：《江西农业大学学报》2007年第5期796-800,共5页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金(30371147);山东农业博士基金资助项目

摘　　要：在连续土壤水分变化过程中,研究了盆栽山桃(Amygdalus davidiana)、山杏(Armeniaca sibirica)、君迁子(Diospyros lotus)、板栗(Castanea mollissima)、花椒(Zanthoxylum bungeanum)2年生苗木的蒸腾速率随土壤水势和叶片水势的日周期变化和连日变化过程。研究结果表明:蒸腾速率和叶片水势与土壤水势呈显著和极显著性相关,蒸腾速率与环境因子只有山杏与光强呈显著性,其余均不显著。山杏蒸腾日进程为单峰曲线,板栗为双峰曲线,峰值出现的时间随干旱胁迫的加深由12:00向08:00提前且数值变小。测定期内(13 d),各供试苗木的日均蒸腾速率从高到低依次为:山杏(1.850 mmol.m-2s-1)、板栗(0.895 mmol.m-2s-1)、花椒(0.755 mmol.m-2s-1)、山桃(0.512 mmol.m-2s-1)、君迁子(0.459 mmol.m-2s-1)。The daily and diurnal transpiration fluctuation and it＇s relation with soil leaf water potential, and environmental factors of five 2-year-old plotted seedlings of A mygdalus davidiana, Armeniaca sibirica,Diospyros lotus,Castanea mollissima,Zanthoxylum bungeanum were studied.The results showed that the diurnal transpiration rate of A.sibirica showed a single apex curve,while C. mollissima showed a double-apices curve when drought stress got worse.Drought stressed tree＇s transpiration peak appeared much earlier and was lower than that in moisture soil condition.The average daily transpiration rates of A.sibirica, C.mollissima, Z.bungeanum, A.davidiana, D lotus in 13 days measurement werel.850, 0.895, 0.755, 0.512, 0.459mmol-m^-2s^-1, respectively.The correlations between leaf transpiration rate of all the tree species and soil and leaf water potential, and leaf transpiration rate of A.sibirica and solar radiation, and leaf water potential and soil water potential were significant.

关 键 词：蒸腾速率 土壤水势 叶片水势 环境因子 

分 类 号：S718.45[农业科学—林学]