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生态学杂志 ›› 2005, Vol. ›› Issue (4): 464-466.

• 研究简报 • 上一篇    

宁夏毛乌素沙地不同恢复措施对物种结构及多样性的影响

王占军1, 王顺霞1, 潘占兵1, 郭永忠1, 陈云云2   

  1. 1. 宁夏农林科学院荒漠化治理研究所, 银川, 750002;
    2. 宁夏大学农学院, 银川, 750021
  • 收稿日期:2004-03-09 修回日期:2004-07-09 出版日期:2005-04-10
  • 通讯作者: 王占军,男,1978年生,实习员研究.主要从事退化草地的植被恢复方面的研究.
  • 基金资助:
    宁夏自然科学基金项目(01A1003);宁夏自治区“十五”重点生态型示范推广建设资助项目(2002-001-01)

Influence of different recover measures on species structure and variety in Mu Us sandy land

WANG Zhanjun1, WANG Shunxia1, PAN Zhanbing1, GUO Yongzhong1, CHEN Yunyun 2   

  1. 1. Institute of Desert Control, Ningxia Science Academy of Agricultural and Forest, Yinchuan 750002, China;
    2. University of Ningxia Agriculture College, Yinchuan 750021, China
  • Received:2004-03-09 Revised:2004-07-09 Online:2005-04-10

摘要: 以宁夏毛乌素沙地退化草原区为研究对象,对荒地(对照)和种植不同密度的柠条林的恢复措施条件下群落结构及多样性进行研究。结果表明,种植柠条林对退化草原的植被恢复有积极的作用,随着柠条林带间距的增加群落结构更趋稳定。由对照的不稳定一年生植物虫实、猪毛菜逐步向稳定的多年生植物白草、赖草、草木犀状黄芪演替。植物群落盖度表现为柠条10m带间距>7m带间距>对照>4m带间距。群落多样性指数表现为柠条10m带间距>4m带间距>对照>7m带间距。群落的均匀度指数变化趋势与群落多样性指数呈正相关,而生态优势度指数与多样性指数呈相负相关.

关键词: Daphnia magna, 1, 8-dihydroxyanthraquinone, Toxicity, Toxicology.

Abstract: The study of retrogress grassland species structure and diversity under the wasteland and Caragana forest with different density recover measures in Mu Us sandy land showed that the planting Caragana forest played a positive role in vegetation restoration.Along with the span of Caragana rows increasing,community structure tended to be more stable.Community structure succeeded from the instable annual of species of C.tylocarpum and Salsola collina in the wasteland to stable perennial species dominated by Pennisetum centrasiaticum,Leymus secalinus and Astragalus melilttoides.Vegetation coverage was in order of 10 m>7 m >4 m in terms of span width,while that of the community diversity was 10 m>4 m >7 m.There was positive correlation between the community evenness index and diversity index,while negative correlation between the dominate index and diversity index.

Key words: Daphnia magna, 1,8-dihydroxyanthraquinone, Toxicity, Toxicology

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