|Table of Contents|

Relationship Between Leaf Area Index and Both Light Use Efficiency and Water Use Efficiency Across Individuals of Salix matsudana

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年01
Page:
62-68
Research Field:
Publishing date:

Info

Title:
Relationship Between Leaf Area Index and Both Light Use Efficiency and Water Use Efficiency Across Individuals of Salix matsudana
Author(s):
CHEN Jing1; HU Guoxian1; ZHOU Jiansong1; ZHAO Chengzhang2
(1.College of Environment and Resources,Wenshan University,Wenshan,Yunnan 663099；2.College of Geography and Environmental Science,Northwest Normal University/Research Center of Wetland Resources Protection and Industrial Development Engineering of Gansu Province,Lanzhou,Gansu 730070)
Keywords:
leaf area index; light use efficiency; water use efficiency; size calsses; Salix matsudana
PACS:
-
DOI:
10.11937/bfyy.20191312
Abstract:
The study area was located in the floodplain wetlands of Zhangye city in the Heihe River basin in northwest China (100.40° E,38.98° N).According to d (the cube root of plant volume) at the Heihe flood plain of Zhangye city,Salix matsudana was divided into 3 size classes,small individuals (I,d250 cm),medium individuals (II,250 cm320 cm),and standardized major axis (SMA) tests were used to examine the relationship of single plant leaf area index (LAI) with light use efficiency (LUE) and water use efficiency (WUE) of Salix matsudana at 3 size classes.The results showed that with the size classes turned from I to III,LAI,gap fraction threshold,photosynthetic active radiation and air temperature increased,and air relative humidity decreased.The height,leaf area,leaf coverage,net photosynthetic rate,transpiration rate and WUE of Salix matsudana increase,while bifurcation angle,leaf thickness and LUE decreased gradually.Stomatal conductance displayed an ‘inverted U-shaped’ trend.LAI had a positive and negative correlation with LUE and WUE at I and III (P<0.05),respectively,while there were significant positive relationship between LAI and both LUE and WUE at II(P<0.05).Moderate LAI,LUE and WUE were used by medium-sized plant at II,and less or larger LAI and photosynthetic efficiency by which number holds sway above the flux were selected by small or large individual at I and III,which reflected the optimization allocation mode between spatial pattern of leaves and resource use efficiency of wetland plant in different size classes.

References:

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Last Update: 2020-01-14