The Effect Of Different Mowing System On Soil Nematode Community Characteristics In Leymus Chinensis Meadow

In order to clarify the effect of mowing on the soil nematode community structure in grassland,the study was carried out in the cutting experimental area of Hulunbeier meadow steppe in August 2018.The results showed that:1.A total of 18987 nematode worms(6 orders,28 families,50 genera)were captured in the experimental area,with an average density of 771 worms per 100g dry soil,including plant parasitic feeding,bacterial feeding,fungal feeding and omnivorous predators.And cpl-5 were appeared,cp2 group is absolutely dominant.2.Cutting reduce the species and the number of nematodes.From the vertical distribution of nematodes,the number of nematodes of 0-10cm is higher than 10-20cm,and the nematodes are surface convergence.Cutting disturbance can increase the nutrient diversity of soil nematodes.3.Cutting will reduce the diversity of nematode community,In the enclosure,the biodiversity of nematode communities was the highest.The soil nutrient enrichment and the maturity of nematode communities were reduced by cutting disturbance.4.And among them,the most influential to the nematode community are soil pH,litter and soil water content.The species and quantity of nematodes has an inhibitory effect on soil pH,while positively correlated with litter,soil water content,organic carbon,available phosphorus,available potassium,and alkali nitrogen.