Stem flow and porometer measurements of transpiration from honey mesquite (Prosopis glandulosa)
Stem flow and porometer measurements of transpiration from honey mesquite (Prosopis glandulosa)
复制标题
蜂蜜豆科灌木（Prosopis mudulosa）蒸腾作用的茎流和孔径计测量
DOI：
10.1093/jxb/45.6.847
复制
发表时间：
1994
影响因子：
6.9
通讯作者：
B. A. Trevino
中科院分区：
文献类型：
--
作者：
R. Ansley;W. Dugas;M. L. Heuer;B. A. Trevino
本研究的目的是比较茎流法和孔隙计法测量半干旱地区蜜豆树（Prosopis mudulosa）蒸腾作用的方法。使用热平衡茎流计测量茎流。在每个茎的叶层内进行叶片气孔导度（gs）的气孔计测量，并使用茎叶面积缩放至整个茎（E茎）的蒸腾值。 1990 年 6 月和 10 月，在人工施加的茎遮蔽或落叶的情况下，每天使用两种方法进行同时测量。茎流量和 E 茎具有相似的昼夜模式，除了 6 月 2 日，当时 E 茎在下午增加，而茎流量相对于中午值下降
The objective of this study was to compare stem flow and porometer methods of measuring transpiration of honey mesquite (Prosopis glandulosa) trees on a semiarid site. Stem flow was measured using heat balance stem flow gauges. Porometer measurements of leaf stomatal conductance (g s ) were made within foliage layers of each stem and scaled to transpiration values for the entire stem (E stem ) using stem leaf area. Simultaneous measurements using both methods were made diurnally and under artificially imposed stem shading or defoliation in June and October 1990. Stem flow and E stem had similar diurnal patterns except on 2 d in June when E stem increased during the afternoon while stem flow declined relative to midday values