文献类型：期刊文献

中文题名：基于侧柏蒸腾量分析Granier经验公式的测量精度

英文题名：Measurement accuracy of Granier calibration based on transpiration of Platycladus orientalis

作者：刘庆新[1] 孟平[1,2] 张劲松[1,2] 高峻[1,2] 孙守家[1,2] 贾长荣[3]

机构：[1]中国林业科学研究院林业研究所;[2]国家林业局林木培育重点实验室;[3]济源市国有大沟河林场

年份：2012

卷号：23

期号：6

起止页码：1490-1494

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：MEDLINE(收录号：22937635);CSTPCD;;Scopus(收录号：2-s2.0-84862264495);北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；PubMed;

基金："十二五"国家科技支撑计划项目(2011BAD38B06);国家林业局林业科技创新平台项目(2012-LYPT-DW-004)资助

语种：中文

中文关键词：热扩散法;整树称重法;液流;侧柏

外文关键词：thermal dissipation method; whole-tree weighing method; sap flow; Platycladus orfentalis.

分类号：S715.4

摘要：为了解Granier热扩散法测定树木蒸腾耗水量的精度,2010年5—6月采用热扩散探针测定盆栽侧柏的液流量,并以整树盆栽称重法作为对照.结果表明:热扩散法测定侧柏南、北两个方位的树干液流速率与称重法测定的蒸腾速率均具有良好的线性关系(R2>0.825).侧柏南、北两个方位的树干平均日液流量分别比平均日蒸腾量低10.6%和15.1%,但未达到显著水平.尽管昼夜温差较大会造成侧柏日液流量小于日蒸腾量,但采用Granier热扩散法测定侧柏的蒸腾量在日尺度上具有较高的可靠性.
In order to understand the accuracy of Granier＇ s thermal dissipation method in measuring tree water consumption, a comparative study was made from May to June, 2010. The sap flow density of potted Platycladus orientalis was measured with thermal dissipation probe, which was compared with the whole-plant gravimetric measurement. There were significant linear relationships （ RE 〉0. 825 ） between the sap flow velocity in both north and south directions of P. orientalis measured by thermal dissipation probe and the transpiration rate measured by gravimetric method. The average daily sap flux in the north and south directions of P. orientalis were 10.6% and 15.1% lower than the daily average transpiration of P. orientalis, respectively, but the differences were not significant. Therefore, Granier＇ s method had high reliability in the measurement of P. orientalis transpiration at daily scale, though the large temperature fluctuation between day and night could result in a lower daily sap flux than daily transpiration.