Transpiration of 4 Typical Plants and Its Affecting Factors in Karst Peak Cluster Depression Area

TAN Juan; WANG Min; GUO Jinchuan; WU Weixiong; HE Lingzu; HUANG Kai; WU Jianqiang

doi:10.13961/j.cnki.stbctb.2017.06.003

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Transpiration of 4 Typical Plants and Its Affecting Factors in Karst Peak Cluster Depression Area

- Transpiration of 4 Typical Plants and Its Affecting Factors in Karst Peak Cluster Depression Area
- Bulletin of Soiland Water Conservation Vol. 37, Issue 6, Pages: 16-21(2017)
- 作者机构：
  
  1. 上海市环境科学研究院,上海,200233
  2. 广西壮族自治区水利科学研究院,广西,南宁,530023
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.06.003
  CLC：
- Published：2017
- 稿件说明：
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TAN Juan, WANG Min, GUO Jinchuan, et al. Transpiration of 4 Typical Plants and Its Affecting Factors in Karst Peak Cluster Depression Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 16-21.
DOI：

TAN Juan, WANG Min, GUO Jinchuan, et al. Transpiration of 4 Typical Plants and Its Affecting Factors in Karst Peak Cluster Depression Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 16-21. DOI： 10.13961/j.cnki.stbctb.2017.06.003.

摘要

[目的

]

对广西壮族自治区喀斯特峰丛洼地4种典型植物（甘蔗、五节芒、灰毛浆果楝和青冈）蒸腾作用及其影响因素进行研究，为进一步开展区域植被生态需水研究提供科学依据。[方法

]

于2015年4月至2016年1月对4种主要植物群落不同季节蒸腾速率（T

）、叶面积指数（LAI）和相关环境因子开展现场观测。[结果

]

4种植物T

夏季与春、秋、冬3季呈极显著差异（p

0.01），不同植物类型其T

也存在差异，其中，甘蔗T

的季节变化为96.55~197.42 g/（m

·h），五节芒为95.26~169.13 g/（m

·h），灰毛浆果楝为97.20~239.11 g/（m

·h），青冈四季T

为81.65~124.42 g/（m

·h）。4种植物T

均与空气温度（T

）呈极显著（p

0.01）或显著正相关关系（p

0.05），与土壤含水率（SWC），LAI，土壤容重（ρ

），空气相对湿度（R

）呈显著或极显著相关关系。SWC和T

对甘蔗T

起主导作用，是主要决策变量；T

是五节芒T

的主要决策变量；SWC和ρ

是灰毛浆果楝T

的主要影响因子；LAI，SWC和T

是青冈T

的主要影响因子。[结论

]

研究区域4种典型植物蒸腾作用存在差异，且均呈季节性变化趋势，不同植物T

影响因素不同，可通过人工诱导水、光、热等环境因子进而合理调控植被生态需水。

Abstract

[Objective] Studying the transpiration and its influencing factors of four typical plants communities (Saccharum officinarum

Miscanthus floridulus

Cipadessa cinerascens and Cyclobalanopsis glauca) in karst peak cluster depression areas of Guangxi Zhuang Autonomous Region to provide scientific basis for the research on regional vegetation ecological water demand.[Methods] Field measurements of transpiration rate(Tr)

leaf area index(LAI)

and related environmental factors in different seasons were conducted from April 2015 to January 2016.[Results] There was an extremely significant difference(p<0.01) between plants transpiration rates in summer and in other three seasons. The seasonal change of transpiration rates of Saccharum officinarum

Miscanthus floridulus

Cipadessa cinerascens and Cyclobalanopsis glauca were 96.55~197.42

95.26~169.13

97.20~239.11 and 81.65~124.42 g/(m2·h)

respectively. An extremely significant and positive correlation(p<0.01) or a significant positive correlation(p<0.05) was found between transpiration rate and air temperature for the four typical plants

and extremely significant or significant correlation significant correlation with soil water content(SWC)

LAI

soil bulk(ρb)

and air relative humidity(RH). Air temperature(Ta) and soil water content(SWC) were the key variables for transpiration in Saccharum officinarum; Air temperature was the key variables for Miscanthus floridulus; In the case of Cipadessa cinerascens

soil water content and soil capacity were the main influence factors on transpiration; Leaf area index

soil water content and air temperature were the main influence factors on transpiration for Cyclobalanopsis glauca.[Conclusion] The differences between transpiration rates of different plant com-munities existed and all of them showed seasonal variation trends. The effects of environmental factors on transpirations of the 4 typical plants were different

which can be artificially induced to regulate the ecological water demand of vegetation.

关键词

Keywords

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