img

官方微信

高级检索

中国沙漠 ›› 2017, Vol. 37 ›› Issue (3): 453-461.DOI: 10.7522/j.issn.1000-694X.2016.00009

• 生物与土壤 • 上一篇    下一篇

施肥对羊草(Leymus chinensis)割草场功能群物种丰富度和重要值的影响

代景忠1, 闫瑞瑞2, 卫智军1, 乌仁其其格3, 辛晓平2, 刘文亭1   

  1. 1. 内蒙古农业大学 生态环境学院, 内蒙古 呼和浩特 010019;
    2. 中国农业科学院农业资源与农业区划研究所, 北京 100081;
    3. 呼伦贝尔学院 生命科学与化学学院, 内蒙古 海拉尔 021008
  • 收稿日期:2015-11-30 修回日期:2016-02-09 出版日期:2017-05-20 发布日期:2017-05-20
  • 通讯作者: 卫智军(E-mail:nmndwzj@163.com)
  • 作者简介:代景忠(1982-),男,内蒙古赤峰人,博士研究生,主要从事草地资源与生态管理研究。E-mail:ddj_209@163.com
  • 基金资助:
    国家公益性行业(农业)科研专项(2013060)

Effects of Fertilization on Functional Group Species Richness and Important Value in Leymus Chinensis Mowing Meadow

Dai Jingzhong1, Yan Ruirui2, Wei Zhijun1, Wurenqiqige3, Xin Xiaoping2, Liu Wenting1   

  1. 1. College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010019, China;
    2. Institute of Agriculture Resource and Regional Planning, Chinese Academy of Agriculture Sciences, Beijing 100081, China;
    3. Life Science and Chemistry School, Hulunbuir College, Hailar 021008, Heilongjiang, China
  • Received:2015-11-30 Revised:2016-02-09 Online:2017-05-20 Published:2017-05-20

摘要: 以呼伦贝尔羊草(Leymus chinensis)草甸天然割草场为研究对象,从植物功能群物种丰富度和重要值的变化来探讨施肥对群落物种多样性的影响机理。运用单、双因素方差分析和直线、曲线回归的方法对相关指标进行统计分析。结果表明:(1)施肥增加会使群落物种的丰富度逐渐降低,这一过程还受到施肥年限的影响。其中,豆科和莎草科功能群物种丰富度对施肥浓度的变化较为敏感(P< 0.05);毛茛科和莎草科受施肥年限的影响较大(P< 0.05);莎草科和杂草类则受到施肥浓度和施肥年限交互作用的影响(P< 0.05)。(2)除莎草科和杂类草功能群外,禾本科、豆科、毛茛科、菊科均受施肥浓度显著影响(P< 0.05)。禾本科和菊科的功能群重要值随施肥浓度的增加而上升,而豆科、毛茛科、杂草类则相应地下降。随着施肥年限的增加,禾本科和菊科功能群的重要值增大。(3)功能群重要值对年降雨量的响应较为敏感,干旱环境会使禾本科和豆科功能群的重要值降低,其他功能群重要值增加。各功能群丰富度和重要值对施肥的响应趋势均有不同,在确定合理的施肥量同时,还应充分考虑施肥年限和降水条件,从而实现草地资源的可持续性利用。

关键词: 割草场, 施肥, 功能群, 丰富度, 重要值, 降雨量

Abstract: According to the mowing grassland of the Leymus chinensis meadow steppe in Hulun buir, researching the mechanism of community species diversity variation from the plant functional group species richness and the important value based on fertilization. Analyzing relevant indices in different methods including one-factor/two-factor variance analysis, linear regression and the curve regression. The results showed that: (1) Adding the concentration fertilizer reduced community species richness gradually, which was also affected by the fertilization year. Functional group species richness of Leguminosae and Cyperaceae was sensitive to the variation of fertilization concentration (P<0.05); Ranunculaceae and Cyperaceae were influenced significantly by fertilization year (P<0.05); Cyperaceae and weeds were affected by the interactive effects both fertilization concentration and fertilization year (P<0.05). (2) In addition to the Cyperaceae and weeds functional group, there has significant impact on important value of Gramineae, Leguminosae, Ranunculaceae and Compositae in definite fertilization concentration(P<0.05).The functional group important value of Gramineae and Compositae increased with the aggrandized fertilization concentration while the Leguminosae, Ranunculaceae and Weeds decreased accordingly. (3) The response of functional groups important value was sensitive to annual rainfall and the Gramineae, Leguminosae function group important value were reduced in arid environment while the other functional group important value was increased accordingly. Because of the different response to the fertilization on functional group richness and important value, we should also give full consideration to the interannual precipitation conditions and fertilization year before fertilization in order to achieve the sustainable utilization of grassland resources.

Key words: mowing land, fertilization, functional group, richness, importance value, precipitation

中图分类号: