Effect Of Soil Arthropod Community By Exogenous Carbon And Nitrogen

Soil animal is refers to the permanent or live in a certain stage in life cycles in the soil the floorboard of all sorts of animals, including arthropod groups and quantity and its influence to the soil ecosystem has a larger advantage, is an important component of soil ecosystem, is one of the important indicators monitoring soil health, have a great effect on improving soil quality. Exogenous nutrients is artificial imposed such as straw, urea nitrogen ect, Source is an important fertilizer in agricultural production, Research on exogenous nutrients of farmland soil arthropod community and diversity, is of great significance in understanding the change of soil quality. Soil arthropod is an important part of the farmland ecosystem, can monitor the health status of the soil. Composition and structure of cropland soil fauna as affected by exogenous carbon and nitrogen was studied in the black soil area of Jilin in2011and2012, using Hand-sorting, modified Tullgren and Baermann’s methods. The field under study was designed to have nine treatments of exogenous carbon and nitrogen, separately, i.e. Contrast blank (CK), exogenous carbon (CO.5, C1.0, C1.5C2.0) and exogenous nitrogen (NO.5, N1.0, N1.5N2.0). The research period, a total of156,017soil arthropods, belonged to8classes,20orders,3suborders,2superfamily and101super-families, the major groups of20classes, which makes up97.76%of the total. The data show that soil arthropods lived mainly in the5-20cm soil layer and increased with soil depth in population and group; and increased with the amount of exogenous nutrients in the number of individuals,group and diversity index. Interannual soil macro-arthropods individuals, group number, diversity index and Simpson index were significant differences(p<0.001). The redundancy(RDA) analysis shown that the significant effect on soil dominant groups was soil temperture, soil moisture, pH, soil total nitrogen and soil organic during decomposition of exogenous nutrients, of which the effect of soil moisture was the biggest.