Soil Fauna Community Characters Of Different Land-use Types In The Hill Of The Changbai Mountains

The sampling sites chosen for this study included four different land-use types,namely Secondary deciduous broad-leaf forest,Shrubbery,Cut-over land and Arable land.Based upon the investigation of the four different land-use types, a comparative study was conclucted on the composition, structureand community diversity of the soil fauna. Abundant taxa of soil macrofaunas were found in these sites, which belong to 18 orders, 6 classes and phyla. Among these,oribatida(23.91%)、actinedida(16.53%)and isotomidae(16.13%)were the dominant groups.The horizontal distribution of soil fauna in different land-use types showed that:As to the individual densitty,Shrubbery>Secondary deciduous broad-leaf forest>Cut-over land >Arable land,As for the group number,The change trend of the group number and individual density was consistent. They exhibited micro domain of the distribution of soil fauna. The individual density and groups of soil macrofaunas in different months had no significant differences between different land-use types. For soil meso-microfauna, the individual density of cut-over land in different months had significant differences, the group number of arable land in different months also had significant differences, the individual density and group of other three land-use types in different month were not significantly different.The vertical distribution of individual density and group number of soil fauna in different land-use types emerged the surface gathering, but the vertical distribution of soil faunas in the secondary deciduous broad-leaved forest and shrubbery along with the soil depth decreased sharply, and the vertical variation of cut-over land and arable land was relatively mild. In different land-use types, the vertical distribution of soil meso-microfauna table cohesion was stronger. This shows that different land-use types affect the vertical distribution of soil fauna, which soil meso-microfauna response to changes in land use types more sensitive. July’s surface aggregation of soil meso-microfaunas than other month was stronger.Diversity of soil fauna was the highest in the shrubbery, followed by seco ndary deciduous broad-leaved forest and cut-over land, arable land was the low est than others. In different land-use types, the D index and the H’ index of s oil macrofaunas in the same month were significantly different. For each landuse type, the D index of soil macrofaunas in different months was not significantly different( p > 0.05), and the H’ index of only cut-over land in different months was significant differences( p <0.05). In different land-use types, the D index and the H’ index of soil meso-microfaunas in the same month was si gnificant differences( p <0.05). For the D index and the H’index of soil meso-microfaunas, the D index of secondary deciduous broad-leaf forest,shrubbery a nd arable land were significant differences between different months( p <0.05),the H’ index of secondary deciduous broad-leaf forest and shrubbery were sig nificant differences between different months( p <0.05).Redundancy analysis method was applied to explore the relationship between the soil physical and chemical properties of different land-use types and composition of soil animals.The results included that p H, available phosphorus, soil temperature, soil organic matter, available nitrogen and soil moisture has a great impact on the composition of soil animals.