摘要
【目的】研究滇西北大狼毒种群扩散蔓延所引起的亚高山草甸群落结构和物种多样性的变化特征。【方法】以滇西北香格里拉县小中甸镇大狼毒型退化亚高山草甸典型样地为研究对象,采用传统的野外生态学调查和数据统计分析相结合的方法,开展不同大狼毒覆盖度退化亚高山草甸群落结构特征、大狼毒种群数量特征及物种多样性比较研究。【结果】随着群落中大狼毒覆盖度的增大,滇西北亚高山草甸的优势物种由华扁穗草+三穗苔草+草地早熟禾+西南委陵菜逐渐演变成大狼毒+西南委陵菜+绶草;群落的植株密度、优良牧草比例、Margalef指数、Shannon-Wiener指数和Pielou指数显著下降,毒害草比例以及大狼毒种群的株高、冠幅、分枝数和地上生物量显著增加。【结论】随着大狼毒覆盖度的增加,滇西北亚高山草甸优良牧草产量下降,物种多样性降低,草地逐渐失去其生产价值。
[Purpose]To explore the variation characteristics of community structure and species diversity (which was caused by the spread of Euphorbia jolkinii) in subalpine meadow in northwest Yunnan.[ Method] The traditional field ecology survey method and the data statistical analysis method were adopted in this research, and the community structure characteristics, the quantitative characteristics of E. jolkinii population and the species diversity were measured in this study.[Result] The dominant species of subalpine meadow in northwest Yunnan changed from Blysmus sinocompressus + Carex tristachya + Poa pratensis + Potentilla fulgens to E. jolkinii + Potentilla fulgens + Spiranthes sinensis. And the plant density, the proportion of excellent forage, the Margalef index, Shannon Wiener index and Pielou index of the community decreased significantly;the proportion of poisonous species, the height, crown width, branch number and aboveground biomass of E. jolkinii increased significantly with the coverage of E. jolkinii increased from less than 10% to over 60%.[Conclusion]Through our study we can include that in the subalpine meadow in Northwest Yunnan, the yield of excellent forage and species diversity decreased and lost its production value gradually with the coverage of E. jolkinii increased from less than 10% to over 60%.
作者
尹海燕
初晓辉
单贵莲
谢勇
梅文君
陈功
袁福锦
YIN Haiyan;CHU Xiaohui;SHAN Guilian;XIE Yong;MEI Wenjun;CHEN Gong;YUAN Fujin(Department of Grass Science, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming650201, China;Kunming Animal Disease Prevention and Control Center, Kunming 650223, China;Yunnan Academy of Grassland and Animal Science, Kunming 650212, China)
出处
《云南农业大学学报（自然科学版）》
CSCD
北大核心
2019年第3期473-478,共6页
Journal of Yunnan Agricultural University:Natural Science
基金
国家自然科学基金(31501999)
云南省自然科学基金(2010CD061)
云南农业大学青年科学基金(2016ZR06)
云南省教育厅科学研究基金重点项目(2015Z1050)
云南省教育厅科学研究基金项目(2015Y204)
农业行业科技专项(201203006)资助
关键词
亚高山草甸
大狼毒
群落结构
物种多样性
种群数量特征
subalpine meadow
Euphorbia jolkinii
community structure
species diversity
quantitative characteristics
作者简介
并列第一作者:尹海燕(1992—),女,云南宣威人,在读硕士研究生,主要从事草地生态系统健康评价研究。E-mail:1207386008@qq.com;并列第一作者:初晓辉(1979—),男,白族,云南大理人,硕士,高级实验师,主要从事草地生态系统恢复演替研究。E-mail:cuxiaohui@ynau.edu.cn;通信作者:单贵莲(1982—),女,云南沾益人,博士,副教授,主要从事草地生态恢复及健康评价研究。E-mail:shanguilian8203@126.com.
