Effect of atmospheric water vapor on photosynthesis, transpiration and canopy conductance: A case study in corn

被引：19

作者：

Ben-Asher, J. ^{[1
]}

Garcia y Garcia, A. ^{[2
]}

Flitcroft, I. ^{[3
]}

Hoogenboom, G. ^{[4
]}

机构：

[1] Minist Sci, Katif R&D Ctr, Agriecol Grp, Katif, Israel

[2] Univ Wyoming, Res & Extens Ctr, Dept Plant Sci, Powell, WY USA

[3] Univ Georgia, Dept Biol & Agr Engn, Griffin, GA USA

[4] Washington State Univ, AgWeatherNet, Prosser, WA USA

来源：

PLANT SOIL AND ENVIRONMENT | 2013年 / 59卷 / 12期

关键词：

growth chambers; water use efficiency; relative humidity; vapor pressure deficit; absolute humidity; STOMATAL CONDUCTANCE; MODEL; RESPONSES; HUMIDITY; GROWTH; FIELD; AIR;

D O I：

10.17221/346/2013-PSE

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The effect of atmospheric water vapor (AV) on plants has mostly been neglected in climate impact studies. The objectives of this study were to determine the effect of AV on photosynthesis (P-n), dry matter production (DM), transpiration (T-r), leaf conductance (g(l)) and water use efficiency (WUE), in climate controlled chambers. The relative humidity (RH) was held near 30, 60, and 85%. DM and WUE increased with RH. delta DM/delta RH similar to 0.3 from 30% to 60% and similar to 2.2 from 60% to 85%, delta WUE/delta RH similar to 0.2 for all RH's. The improved WUE at a rate of 0.2 units for each percent of increased RH resulted from a synergy between larger gl and lower Tr at high RH. This conclusions carries a bleak message to dry regions.

引用

页码：549 / 555

页数：7

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