Effects of Different Grassland Management Practices AMF Abundance,Diversity and Community Composition in Grassland Soils
[Objective]This study aims to investigate the effects of different grassland management prac-tices on the symbiotic relationship between plants and arbuscular mycorrhizal fungi(AMF),as well as the composition of the mycorrhizal fungi community in grass-legume mixtures.[Method]The research was conducted at the Yunnan Breeding and Promotion Center of Sheep Breeding in Yunnan Province.The experimental design included three different grassland management practices:a mowed 1-year grass-legume mixture,a mowed 3-year grass-legume mixture,and a fenced grassland.For each management type,assessments were conducted on plant communities,soil properties,AMF mycelium density,spore density,mycorrhizal colonization rate,and AMF community composition.[Result]Compared with the fenced grassland,the mycelial density of AMF in the soil was significantly decreased in the 1-year mow-ing treatment,whereas AMF abundance declined in the 3-year mowing treatment.Mowing treatments did not exert significant effects on the spore density or the mycorrhizal colonization rate of AMF.However,the AMF community structure of AMF exhibited significant variation across different mowing treatments,with Glmous identified as the dominant AM fungal genus in the grassland soil.Furthermore,the diversity of AMF was significantly and positively correlated with plant community diversity.[Conclusion]Differ-ent mowing techniques substantially influence the abundance,diversity,and community composition of AMF within grassland soils.Appropriate grassland management and utilization practices are essential for preserving the advantageous symbiotic relationship between vegetation and beneficial soil microorganisms in grassland ecosystems.
万方数据
维普
