克氏针茅草原植物群落特征及稳定性对不同放牧方式的响应——以中蒙边境两个苏木为例

Responses of Plant Community Characteristics and Stability of Stipa krylovii Steppe to Different Grazing Patterns——A Case Study of Two Sumu on China-Mongolia Border

采用了野外采样和数据分析相结合的方法,从定性和定量两个角度探讨了不同放牧方式对克氏针茅草原植物群落特征及稳定性的影响。得出结论如下:中蒙样带内两苏木牧户草场样地群落内植物总种数几乎相同,但群落内植物组成结构已出现显著差异,主要表现在植物科属和优势种群的差异上;那仁苏木牧户草场样地群落内,多年生植物比重降低,植物的一年生化现象比纳兰苏木更为严重;那仁苏木牧户草场样地植物群落的稳定性低于纳兰苏木,牧户草场可能出现点、面状退化现象;放牧方式会对草场植物群落特征及稳定性产生重要影响,不当的放牧方式可能引起草场生态系统失衡。

A combination of field sampling and data analysis was used to investigate the effects of different grazing methods on plant community characteristics and stability of Stipa krylovii steppe from qualitative and quantitative perspectives in this paper.The conclusions are as follows:The total number of plants in the grassland plant community of the herdsmen in the study area is almost the same,but the plant composition structure in the community has been significantly different.Mainly manifested in the differences between plant families and dominant populations;Within the plant community of Naren Sumu Herder's grassland,the proportion of perennial plants is reduced,and the one year biochemical phenomenon of plants is more serious than Nalan Sumu;The stability of the plant community in the grassland plot of the Renbao Lager Sumu herdsman is lower than that of the Nalan Sumu,and the pastures may have point and surface degradation;Grazing patterns have an important impact on the characteristics and stability of pasture plant communities.Improper grazing methods may cause grassland ecosystem imbalance.