This article contrasted the enclosed and unenclosed grasslands for soil water

soil nutrients

water stable aggregates

and community structure.Results showed that in grasslands

soil water active layer was 0—20 cm

and meanwhile

compensatory depths were 140 cm and 20 cm in enclosed and unenclosed grasslands

respectively.Below the depths

soil water content kept the level of 9.5% and 8.5% in enclosed and unenclosed grasslands

respectively.With soil depth increased

soil water stable aggregate content(1 and 0.25 mm) was reduced gradually and in enclosed grassland

it was greater than that in unenclosed grassland.Except the available P

the contents of soil organic matter

total N

available K

available N

NO3-—N and NH+4—N in enclosed grassland were much greater than those in unenclosed grassland.The number of species

Simpson index

Shannon—Wiener index

and Pielou index in the two grasslands were similar.The average plant height and coverage in unenclosed grassland were less than those in enclosed grassland and the differences were significant.