稳态气孔计与其它3种方法蒸腾测值的比较研究  

A Comparison on the Transpiration Values Measured with Steady State Porometer and Other Three Methods

作　　者：巨关升[1] 刘奉觉[1] 郑世锴[1] 吴晓春 汝成祥 

机构地区：[1]中国林业科学研究院林业研究所,北京100091 [2]山东省沂南县林业局,山东沂南276300

出　　处：《林业科学研究》2000年第4期360-365,共6页Forest Research

基　　金：国家自然科学基金! (38970 1 6 9);中国林科院科学技术发展基金资助 ;世界银行贷款国家造林项目! (NAP)"杨树研究与推广"课题的一

摘　　要：198 9～ 1992年 ,分别在山东 (鲁克斯杨 )与宁夏 (合作杨 )人工林中 ,用 3种方法 (快速称量法、热脉冲法和整树容器法 )多次对比了气孔计测值的变化。结果表明 ,气孔计测值恒大于实际蒸腾值。根据 10次 10 2 6个样本比较 ,气孔计测值约为自然蒸腾值的 1.3～ 3.2倍 ,平均为 2 .6 4 9倍 ,其平均校正系数为 0 .3775,干旱地区为 0 .6 4 52 ,较湿润地区为 0 .340 7,此值可作为蒸腾耗水研究的参考。From 1989 to 1992,quick weighing method,heat pulse technique,whole tree potometer were applied for many times together with steady state porometer to measure the transpiration of the poplar forests in Ningxia ( Populus × xiaozhuanica cv. ‘Opera’) and in Shangdong ( Populus deltoides cv.‘Lux’).The results showed that the values measured with steady state porometer were always higher than the actual values of transpiration while the values measured with the other three methods were believed to be close to the latter.The former were 1.3～3.2 (2.649 on average) times as high as the latter,varing with weather and plant conditions.So,the former values need to be adjusted with a coefficient.The correction coefficient would approximately be 0.377 5 on an average,with 0.645 2 in arid area and 0.340 7 in more humid area.

关 键 词：稳态气孔计 树木蒸腾耗水量 气孔计测值 

分 类 号：S715.4[农业科学—林学]