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- Title
放牧对山地草甸草地植物多样性与生产力关系的影响.
- Authors
雪热提江·麦提努日; 杨晶晶; 吐尔逊娜依·热依木; 张青青
- Abstract
【Objective】 To study changes of plant community in mountain meadow grassland under different grazing intensities in the hope of providing scientific basis for rational utilization of this kind of grassland. 【Method】 From 2016 to 2018, for three consecutive years, field sampling and indoor analysis were used to analyze the quantitative characteristics, diversity index and the relationship between diversity index and aboveground biomass of mountainous meadow grassland in the middle part of the northern slope of Tianshan Mountain. The quantitative characteristics, diversity index and the relationship between the diversity index and the above-ground biomass were analyzed by light grazing (LG), heavy grazing (HG) and non-grazing control (CK). 【Result】 (1) Under different grazing intensities, perennial herbs were dominant in mountain meadow, and the dominant species were Carex stenocarpa, Koeleria cristata, Stipa capillata and Achnatherum inebrians. Under the condition of heavy grazing (HG), livestock firstly adopted plants with good palatability, and the number of plants with good palatability in the community decreased, and the dominant position of the community was gradually replaced by poisonous plants such as A. inebrians. (2) Under CK and light grazing (LG) and heavy grazing (HG) conditions, with the increase of grazing intensity, above-ground biomass, height and coverage of plant communities showed a decreasing trend from 2016 to 2018 (P<0.05). The community density showed a decreasing trend from 2016 to 2017 (P<0.05). (3) With the increase of grazing intensity, the Shannon-Wiener diversity index, Simpson index and Pielou evenness index of plant community species all declined, showing CK > LG > HG. There was no significant difference between CK, LG and HG from 2016 to 2017 (P> 0.05), while there was significant difference between CK, LG and HG in 2018 (P< 0.05). (4) There was a positive linear correlation between Pielou index, Shannon-Wiener index, ,Margalef index, aboveground biomass under LG, HG and CK conditions (P<0.05). 【Conclusion 】 Under different grazing intensities, the Simpson index, Pielouindex and Shannon-Wiener index of plant communities in mountain meadow decreased with increase of grazing intensities. There was a significant positive linear correlation between aboveground biomass and Pielou evenness index, Shannon-Wiener diversity index and Margalef index (P<0.05).
- Publication
Xinjiang Agricultural Sciences, 2019, Vol 56, Issue 11, p2123
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2019.11.019