树木蒸腾耗水测算技术的比较研究  

A STUDY ON COMPARISON OF MEASURING WATER-CONSUMPTION FOR TRANSPIRATION IN POPLAR

作　　者：刘奉觉[1] 郑世锴[1] 巨关升[1] 吴衍德 

机构地区：[1]中国林业科学研究院林业研究所 [2]新西兰皇家园艺食品研究所 [3]山东省沂南县林业局

出　　处：《林业科学》1997年第2期117-126,共10页Scientia Silvae Sinicae

基　　金：国家自然科学基金;中国林科院科学技术发展基金

摘　　要：１９８９—１９９１年，分别在山东（Ｉ－６９杨）与宁夏（合作杨）人工林中，用五种方法（整树容器法、热脉冲法、快速称重法、稳态气孔计法和微气象法）进行了蒸腾耗水的比较测定，结果表明：１．以整树容器法测定的单株日耗水量为１００％，则水分饱和下快称法相应值为１３０％—１４０％；气孔计法值为２９１％；热脉冲法值为９０．１４％。２．以热脉冲法测定的日耗水量为１００％，则快称法的测值为８８％（六年生树）与１１２％（二年生树）。３．气孔计法测值高于快称法，在宁夏干旱地区为后者的１３０％—１９０％，在山东较湿润地区为２４０％—３２０％。４．微气象法中午蒸腾值十分接近整树容器法与热脉冲法，其误差小于２％。A study on comparison of five methods for the transpiration water-comsumption conducted in poplar plantation in Shandong province (Populus deltoides cv.“Lux”ex.I-69/55) and Ningxia Autonomous Region (Populus opera) from 1989 to 1991.The five measuring methods are whole-tree potometer,quick-weighing method,LI-1600 porometer,heat pulse technique and Penman-Monteith method.The results of the study are as follows:(1) Supposing that the relative value of daily transpiration water-consumption per tree measured with whole-tree potometer is 100%,the relative value measured by quick-weighing method is 130%—140%,the relative value measured with LI-1600 porometer is 291% and the relative value measured by heat pulse technique is 90.14%.(2) Supposing that the relative value of the daily transpiration water-consumption per tree measured by heat pulse technique is 100%,the relative value measured by quick-weighing method is 88% in 6-year-old tree and 112% in 2-year-old tree.(3) The value measured with LI-1600 porometer is 30%—90% higher than that measured by quick-weighing method in Ningxia arid zone and 140%—220% higher than that in more humid area of Shandong Province.(4) The value measured by Penman-Monteith method is very close to that measured with whole-tree potometer and that measured by heat pulse technique with errors less than 2%.

关 键 词：树木蒸腾耗水 蒸腾测定技术 整树容器法 热脉冲法 

分 类 号：S718.43[农业科学—林学]