Effects of Moss Crust on Soil Nutrients and Microbial Community Structure in Alpine Meadow
Moss crust is an important component of plant community in alpine meadow.To explore the effects of moss crust on soil properties in alpine meadow,the soils of the moss crust on the different slopes(the flat,the gentle and the steep)of alpine meadows were taken as the treatments,while the soil without moss crust was taken as the controls.The effects of the moss crust on the soil nutrients and soil microbial community structure were studied.The results showed that the contents of organic matter(20.4%-100.7% ),nitrate nitrogen(64.9%-161.5% ),ammonium nitrogen(93.8%-236.1% ),available potassium(24.3%-50.7% )and total nitrogen(47.0%-67.0% )in the alpine meadow soil under moss crust were significantly increased(P<0.05).The moss crust increased the relative abundance of Acidobacteria and Chloroflexi,the richness and diversity of soil bacterial community,while it decreased the relative abundance of Mortierellomycota of all the treatments and Ascomycota of soils in slopes,the richness and diversity of soil fungal community.The soil nutrients and microbial communities of the moss-covered alpine meadow were also affected by the slope,and the bacterial diversity was highest in the flat land.The most soils on the gentle slope had the higher nutrient content,and the highest soil fungal diversity.Therefore,the moss crust can improve the fertility and microbial community struc-ture of the soil in the alpine meadow,and plays an important role in the maintenance and succession of the alpine meadow ecosystem.And the effect is related to the slope.
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