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大型节水改造灌区植物种类多样性评价分析
袁晓奇¹, 任树梅¹, 杨培岭¹, 张宏武², 张义强³, 刘宏云³
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(1.中国农业大学水利与土木工程学院,北京 100083;2.巴彦淖尔市林业科学研究所,内蒙古临河 015000;3.内蒙古河套灌区沙壕渠试验站,内蒙古杭锦后旗 015400)

摘要:

为研究节水改造工程对植被物种多样性产生的影响,采用样方调查法对典型节水改造区——河套灌区杨家河干渠衬砌与不衬砌渠道的周边植被状况进行分析。结果表明:1)未衬砌渠道和砌衬渠道的多样性指数分别为2.693和2.116,均匀度指数为0.613和0.529 ,未衬砌渠道均高于衬砌渠道;2)土壤水盐因子与植被多样性的灰色关联识别顺序为:θ_{20~40 cm}>θ_{40~60 cm}>pH_{0~20 cm}>pH_{40~60 cm}>pH_{20~40 cm}>EC_{0~20 cm}>EC_{20~40 cm}>θ_{0~20 cm}>EC_{40~60 cm},即土壤含水率是决定研究区植物多样性的重要因素;3)未衬砌渠道周边植被生长状况明显优于衬砌渠道。生长环境的改变会导致部分草本植物退化,而对乔木、灌木的生长影响不大。

关键词: 河套灌区节水改造植物多样性指数灰色关联识别

DOI：10.11841/j.issn.1007-4333.2010.03.015

投稿时间：2009-08-26

基金项目:水利部公益项目(200701025)第一作者:袁晓奇,硕士研究生,E-mail:yxqcau@yahoo.com.cn通讯作者:任树梅,教授,主要从事水文与水资源研究,E-mail:renshumei@126.com

Diversity assessment and analysis of vegetation species ina large-scale irrigation district under a water-saving project

YUAN Xiao-qi¹, REN Shu-mei¹, YANG Pei-ling¹, ZHANG Hong-wu², ZHANG Yi-qiang³, LIU Hong-yun³

(1.College of Water Conservancy and Civil Engineering,China Agricultural University,Beijing 100083,China;2.Bayannur Forestry Science Institute,Linhe 015000,China;3.Shahao Canal Experiment Station of Hetao Irrigation District,Hanghou City 015400,China)

Abstract:

In order to investigate the impact on the vegetation diversity under a water-saving project,the plant quadrat method was used to analyze the surrounding vegetation of the non-lining channel and the lining channel at Yangjia River of Hetao irrigation district as a typical water-saving zone.The results showed that:1) the vegetation diversity and evenness index of the non-lining channel are greater than that of the lining channel,the differences are 0.577 and 0.084,respectively; 2) the analytical results of relations in soil water-salt factors and vegetation diversity by grey incidence recognition are θ_{20~40 cm}>θ_{40~60 cm}>pH_{0~20 cm}>pH_{40~60 cm}>pH_{20~40 cm}>EC_{0~20 cm}>EC_{20~40 cm}>θ_{0~20 cm}>EC_{40~60 cm},which indicates that water content in soil play a major role for this sequence; 3) the growth status of the non-lining channel is better than the lining channel obviously.In conclusion,the effect of environmental changes may make some herbaceous plants degrade,but it is weak for arbors and shrubs.

Key words: Hetao irrigation district water-saving project index of vegetation diversity grey incidence recognition