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:θ20~40 cm>θ40~60 cm>pH0~20 cm>pH40~60 cm>pH20~40 cm>EC0~20 cm>EC20~40 cm>θ0~20 cm>EC40~60 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 |
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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
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(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 θ20~40 cm>θ40~60 cm>pH0~20 cm>pH40~60 cm>pH20~40 cm>EC0~20 cm>EC20~40 cm>θ0~20 cm>EC40~60 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 |