Ecology Research of Soil Macrofauna in Grass under Different Density Degree

According to the research of 61 soil macrofauna,which belong to 3 phylums,7 Classes,14 kinds,under different density degree of the herb,we arrive at a conclusion:superiority group are Araneida and Hymenoptera;H' index in herb(dense) is the highest;e index in herb(sparse) is the highest;c index in herb(none)is the highest;group and individual number of soil macrofauna in spatial distribution are herb(dense)herb(sparse)herb(none),and another surface aggregation phenomenon;herb(sparse) and herb(dense) display medium in the community similarity coefficients,and herb(none) and herb(dense) display obviously medium not similar.