Features of the soil microorganism and its enzyme activities of orchard under different management measures in southern Xinjiang

Effect of different management measures of orchard on soil Microorganism and its Enzyme activities was determined in southern Xinjiang. The results of this study showed that the total number of soil microorganism was mulching grassgrowing grassnotillageclean tillage. The mulching grass and growing grass treatments greatly increased the total number of soil microorganism by 32.90% and 11.63%, respectively, when compared to notillage, and increased by 38.09% and 15.99% when compared to clean tillage. In the microorganism components, the number of bacteria was dominant, and the actinomycetes and fungi came to the second and the third. The number of microorganisms showed obviously vertical distribution characteristics, in which the bacteria, actinomycetes and fungi were the highest at 0-20 cm layer for each treatment, and decreased with the increase of soil depth. The soil enzyme activities was the mulching grassgrowing grassnotillageclean tillage and they decreased as the soil depth increased, which was consistent with the number of microorganisms.