|Table of Contents|

Effect of Soil Moisture on Light Response Process for Vitex negundo(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年23
Page:
122-127
Research Field:
Publishing date:

Info

Title:
Effect of Soil Moisture on Light Response Process for Vitex negundo
Author(s):
LI HongXU HuanCHEN Jinchen
School of Geography,Geomatics and Planning,Jiangsu Normal University,Xuzhou,Jiangsu 221116
Keywords:
photosynthesiswater use efficiencyVitex negundophotosynthesis active radiation
PACS:
-
DOI:
10.11937/bfyy.20171881
Abstract:
In order to provide a solid foundation for the analysis of plant physiological ecology,the effects of soil moisture on photosynthetic light response process of Vitex negundo were studied by CIRAS-2 automatic and portable photosynthesis measuring system made in the USA.The results showed that the photosynthesis rate (Pn),transpiration rate (Tr),leaf water use efficiency (WUE),light use efficiency (LUE) had obvious threshold response to soil moisture and photosynthesis active radiation(PAR).According to Pn of PAR response characteristics of soil moisture,the adaptability to light could be improved in moderate stress.According to the response characteristics of Pn and WUE on soil moisture,Pn could be improved in mild water stress;when the soil relative water content(RWC) was about 57.7%,Pn reached the maximum value.WUE could also be improved in moderate water stress,and it reached the maximum value in 48.8%.Together the quantitative relationship between Pn,WUE and soil moisture,Vitex negundo could also maintain a high photosynthetic rate and water use efficiency in the range of soil moisture 39.6% to 57.7%.

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Last Update: 2017-12-19