围封对黄帚橐吾型退化草地植被群落特征的影响  

Effects of Enclosure On Vegetation Community Characteristics of Ligularia Virgaurea-Dominatedegraded Grassland

作　　者：王玉琴 张千山 王宏生[1] 宋梅玲 周睿 WANG Yuqin;ZHANG Qianshan;WANG Hongsheng;SONG Meiling;ZHOU Rui(Academy of Animal and Veterinary Science,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学畜牧兽医科学院,青海西宁810016

出　　处：《青海畜牧兽医杂志》2024年第1期1-7,23,共8页Chinese Qinghai Journal of Animal and Veterinary Sciences

基　　金：青海省应用基础研究计划项目(2023-ZJ-723);国家自然科学基金区域创新联合基金项目(U21A20186);青海省“昆仑英才·高端创新创业人才计划”拔尖人才培养计划项目。

摘　　要：围栏封育被认为是一种快速、有效地恢复草地植物多样性和生产力的措施。本研究以黄帚橐吾型退化草地为研究对象,采用野外调查与室内分析的方法,分析围封3年对草地群落物种重要值、植被多样性以及植物地上、地下生物量的影响,旨在为黄帚橐吾型退化草地的治理恢复提供科学理论依据。结果表明,短期围封可提高禾本科牧草的重要值,围封后黄帚橐吾重要值明显下降,除丰富度指数显著降低外(P<0.05),其余指数变化不显著;短期围封可显著降低黄帚橐吾的地上生物量和种群密度,提高草地生产力,其中,禾本科和莎草科地上生物量明显提高(P<0.05),0~10 cm土层的草地地下生物量明显降低。Fencing is considered to be a rapid and effective measure for degraded-grassland plant diversity and biomass restoration.To provide a theoretical basis for the L.virgaurea-dominate degraded grassland restoration,field investigation and lab analysis methods were used to analyze the effects of enclosure for 3 years on the importance value of plant species,vegetation diversity and aboveground and belowground biomass of the grassland community of L.virgaurea-dominate degraded grassland.The results showed that the short-term enclosure could increase the important value of Gramineae,and the importance value of L.virgaurea decreased significantly.Except the richness index decreased significantly(P<0.05),the other indexes did not change significantly.Enclosure could significantly reduce the aboveground biomass and population density of L.virgaurea,and improve the grassland productivity,the aboveground biomass of Gramineae and Cyperaceae were significantly increased(P<0.05),while the belowground biomass of them in 0~10 cm soil layer decreased significantly.

关 键 词：围封 黄帚橐吾 物种多样性 生物量 

分 类 号：S812.6[农业科学—草业科学]