[1]CHENG Zhong-qiu,ZHANG Ke-bin,LIU Jian,et al.The Study on Vegetable Niche of Natural Grassland of Desertification Grassland Region in Yanchi County, Ningxia[J].Research of Soil and Water Conservation,2011,18(03):36-40,47.
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The Study on Vegetable Niche of Natural Grassland of Desertification Grassland Region in Yanchi County, Ningxia
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
18
Number of periods:
2011 03
Page number:
36-40,47
Column:
Public date:
2011-06-20
- Title:
- The Study on Vegetable Niche of Natural Grassland of Desertification Grassland Region in Yanchi County, Ningxia
- Keywords:
- desertification grassland; niche breadth; niche overlapping; rainfall
- CLC:
- S812.29
- DOI:
- -
- Abstract:
- In order to show growth of plants in natural grassland of desertification grassland region from niche’s view,the niche breadth and niche overlapping of plants are measured by means of Levins niche breadth and Pianka niche overlapping indexes in the grassland of Wuliangdian,Yanchi county,Ningxia.It shows that Lespedezadavurica(Laxm.) Schindl.,Cynanchum komarovⅡ Al.,Heteropappus altaicus which have the biggest niche breadth are dominant species in natural grassland in 2008,while in 2009 Heteropappusaltaicus(Willd.) Novopokr.,Lxeris chinensis var.graminifolia(Ledeb.) H.C.Fu,Cynanchum komarovⅡ Al.,Lespedezadavurica(Laxm.) Schindl.become the dominant species.Meanwhile,the result of niche overlapping in 2008 and 2009 showed that the species with big niche breadth did not always have big niche overlapping,and the niche breadth and niche overlapping did not have an obvious linear relation.Compared with 2008,in 2009 the niche breadth and niche overlapping were bigger on the whole,because the amount of rainfall from June to August are more in 2009,the plants grow well with bigger density and higher use of resources,and interspecific competition of the plants is more fierce.And these indicate that the amount of rainfall is the primary factor for growth of plants.
- References:
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