围封相较于放牧对植物群落特征及植被生态质量影响研究

Study on the impact of enclosure on plant community characteristics and vegetation ecological quality compared to grazing

研究了2019—2023年一处冷蒿退化草地在围封和放牧不同管理措施下,植物群落结构和植被生态质量的变化情况。研究结果表明,与放牧相比,围封有利于退化草原的生态恢复和发展,可提高草地植被生产力,提高植被群落物种多样性,同时也提高了植被群落的高度、盖度和平均密度。从提高幅度来看,围封对群落高度的影响最大,平均密度次之,对群落盖度、生产力和物种多样性影响相对较小。围封对植被质量恢复有显著的正向影响,围封监测点位的植被质量好于放牧监测点位一个评价等级。

The changes of plant community characteristics and vegetation ecological quality in a degraded arte-misia frigida grassland monitoring sites under different management measures of enclosure and grazing from 2019 to 2023 were studied.The results showed,compared with grazing,enclosure was beneficial to the ecological restoration and development of degraded grassland,and could improve the grassland vegetation productivity and species diversity,the height,coverage and average density of vegetation community were also increased.Judging from the extent of the increase,enclosure had the greatest effect on community height,followed by average density,and had relatively less ef-fect on community coverage,productivity and species diversity.Enclosure has a significant positive effect on vegeta-tion quality restoration,the vegetation quality of enclosed monitoring sites was one grade better than that of grazing.