季节性放牧对羊草功能性状的影响
发布时间:2018-01-20 19:45
本文关键词: 季节性放牧 羊草功能性状 敏感性指标 惰性指标 出处:《中国草地学报》2017年05期 论文类型:期刊论文
【摘要】:以内蒙古典型草原为对象,比较研究了羊草功能性状对放牧的响应。2016年,在羊草种群生物量高峰期(8月)测定了连续4年放牧(2012~2015年)和无牧条件下的株高、叶总长、地上生物量、茎质量、总叶面积和茎粗等17个性状指标,结果显示:经过4年放牧羊草株高、叶下茎高、叶层分布高度、茎质量、整株质量、第1片叶长度显著降低(P0.05),第1片叶角度、叶展显著增大(P0.05),这8个指标为敏感性指标;其余9个指标为惰性指标。
[Abstract]:The responses of functional traits of Leymus chinensis to grazing were compared with those of typical grassland in Inner Mongolia. 2016. The plant height, total leaf length, aboveground biomass and stem mass of Leymus chinensis were measured at the peak of the population biomass of Leymus chinensis (August) and under the condition of no grazing from 2012 to 2015. The total leaf area and stem diameter were 17 characters. The results showed that after 4 years of grazing, the plant height of Leymus chinensis, the height of lower leaf stem, the height of leaf layer distribution, the quality of stem and the whole plant mass were obtained. The length of the first leaf decreased significantly (P 0.05), and the angle of the first leaf increased significantly (P 0.05). These eight indexes were sensitive indexes. The remaining 9 indexes are inert.
【作者单位】: 内蒙古大学生态与环境学院;
【基金】:国家重大基础研究项目(2014CB1388051) 内蒙古自然科学基金重大项目(2015ZD05) 国家科技支撑项目(2013BAC09B03)
【分类号】:S812
【正文快照】: 放牧不仅改变草地生态系统的植被组成和群落结构[1],而且还会引起种群大小和植物个体形态和结构的改变。草食动物通过采食等行为作用于局部植物的生存与灭绝来动态调控植物[2],同时也受植物的作用来维持草地生态系统过程[3]。因此,草食动物的采食过程势必会改变植物个体的一些,
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