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应用生态学报 ›› 2021, Vol. 32 ›› Issue (2): 392-398.doi: 10.13287/j.1001-9332.202102.003

• 草地生态学专栏 • 上一篇    下一篇

放牧强度对内蒙古典型草原糙隐子草功能性状的影响

吴思雨1, 宝音陶格涛1,2,3, 许宏斌1,2,3*, 张璐1,4   

  1. 1内蒙古大学生态与环境学院, 呼和浩特 010021;
    2蒙古高原生态学与资源利用教育部重点实验室, 呼和浩特 010021;
    3省部共建草地生态学国家重点实验室培育基地, 呼和浩特 010021;
    4运城市纪委监委, 山西运城 044000
  • 收稿日期:2020-04-18 接受日期:2020-07-10 出版日期:2021-02-15 发布日期:2021-08-15
  • 通讯作者: *E-mail: xhb1686@163.com
  • 作者简介:吴思雨, 女, 1996年生, 硕士研究生。主要从事草地生态学研究。E-mail: wusiyu188@126.com
  • 基金资助:
    国家重点研发计划项目(2016YFC0500604)和国家林业和草原局试点项目资助

Effects of grazing intensities on functional traits of Cleistogenes squarrosa in a typical grassland of Inner Mongolia, China

WU Si-yu1, BAO Yin-tao-ge-tao1,2,3, XU Hong-bin1,2,3*, ZHANG Lu1,4   

  1. 1School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China;
    2Key Laboratory of Mongolian Plateau Ecology and Resource Utilization, Ministry of Education, Hohhot 010021, China;
    3Provincial and Ministry Jointly Build the Cultivation Base of State Key Laboratory of Grassland Ecology, Hohhot 010021, China;
    4Commission for Discipline Inspection of the CPC Yuncheng, Yuncheng 044000, Shanxi, China
  • Received:2020-04-18 Accepted:2020-07-10 Online:2021-02-15 Published:2021-08-15
  • Contact: *E-mail: xhb1686@163.com
  • Supported by:
    National Key R&D Program of China (2016YFC0500604) and the Pilot Project of National Forest and Grass Bureau of China

摘要: 研究糙隐子草株高、丛幅等11个性状指标对不同强度放牧(不放牧;5、7月两次放牧;全生长季5次放牧)的响应。结果表明: 以不放牧为对照,经过连续5年的放牧处理,糙隐子草的生殖枝数、株高、茎质量、比叶面积和总叶面积显著降低,5、7月放牧处理各指标降幅分别为61.7%、21.5%、33.3%、21.6%、26.7%,全生长季放牧处理各指标降幅分别为75.7%、24.7%、46.7%、28.5%、43.7%,降幅随放牧强度的增加显著增强。在不同放牧强度下,糙隐子草的营养枝数、叶片数、总叶面积、茎质量、总叶质量、丛幅均与整丛地上生物量呈现协同变化关系,营养枝数与茎质量和总叶质量呈显著正相关。糙隐子草应对不同放牧强度干扰表现出矮小-密枝化的避牧响应策略,减轻放牧强度有利于维持其个体性状的稳定。

关键词: 放牧强度, 糙隐子草, 功能性状

Abstract: We examined the response of 11 functional traits of Cleistogenes squarrosa, including plant height and clump width, to the grazing of different intensity (no grazing; twice grazing in May and July; five grazing in the whole growing season). After five-year treatments, the number of reproductive branches, plant height, stem quality, specific leaf area and total leaf area were significantly reduced. Such reduction was significantly increased with the increases of grazing intensity. Under the treatments of grazing in May and July, the declines of each index were 61.7%, 21.5%, 33.3%, 21.6% and 26.7%, respectively; and the declines in the treatment of whole growing season grazing were 75.7%, 24.7%, 46.7%, 28.5% and 43.7%, respectively. The number of vegetative branches, number of leaf, total leaf area, stem quality, total leaf quality and clump width of the C. squarrosa had a synergistic relationship with aboveground biomass of the whole clump under different grazing intensities. The number of vegetative branches was significantly positively correlated with stem quality and total leaf quality. C. squarrosa had a dwarf-dense branching strategy to avoid grazing. The reduction of grazing intensity would be conducive to maintaining the stability of functional traits.

Key words: grazing intensity, Cleistogenes squarrosa, functional trait