Tillage Practices On Soil Microbes And Soil Humus Impact

This paper studies the no-tillage, autumn plowing, pine farming, conventional farming, the number of microorganisms and microbial biomass carbon in the soil of maize rotation sequence, combined with soil carbon sequestration ability to explore a better approach to improve soil the number of microorganisms and enhanced soil carbon sequestration capacity in the region of Agriculture to provide reasonable farming patterns, and major findings are as follows:Bacteria, actinomycetes, fungi is a major component of soil microorganisms, farming methods to varying degrees, affect the composition of the soil three microorganisms. See from the total number of soil microorganisms, the average number of microorganisms in soil under no-tillage conditions than other farming methods under the conditions of the number.Which tillage practices on microbial:DQ kind of no-tillage soil microbial diversity index is relatively large, indicating that the content of microbial species in the NT soil, and microbiological differences is relatively small.Because ubiquinone is present in the eukaryotic microorganisms inner mitochondrial membrane and the cell membrane of gram-negative bacteria, which are generally used for the aerobic respiration of microorganisms and nitrate respiration; menadione present in the Gram-positive bacteria and individual leather on the cell membrane of Gram-negative bacteria, it is generally used in microbial anaerobic respiration. MK/Q value can reflect the ratio of Gram-positive bacteria, Gram-negative bacteria and gram-negative bacteria of. Ubiquinone redox potential than menaquinone, MK/Q value can also reflect the metabolic status of the Environmental Microbiology, MK/Q value is high to indicate that anaerobic metabolism is dominant, the contrary of MK/Q value is low indicates that the predominant aerobic metabolism. The results show that:different farming methods can significantly improve the anaerobic metabolism of soil microbes.Maximum uniformity index EQ is the EQ for1:00that same proportion of all microorganisms, the smaller the EQ value said the distribution of microbial species is more uneven. The uneven distribution of conventional soil microorganisms, followed by autumn and turn the soil tillage and subsoiling and soil microbial distribution is more balanced. This may be due to the application of different tillage types of microorganisms in the soil to reduce the dominant population is more concentrated, is not conducive to the retention of soil microbial diversity.The impact of tillage practices on microbial biomass carbon:different processing, microbial biomass carbon as the soil layer deepened gradually decreasing,0-5cm layer5-10cm layer of 10-30cm layer.Microbial biomass carbon in surface soil (0-5cm) in dynamic changes as the seasons change, regardless of the farming methods, microbial biomass carbon content is highest in August and November the lowest.Subsoiling tillage at the same time the advantages of no-tillage and conventional tillage, topsoil depth by conventional tillage,15～20cm up to45cm above the effective soil weight increased more than50%. Subsoiling tillage can reduce soil organic matter mineralization. Surface soil organic carbon (SOC) content in all tillage treatments were higher than the bottom.Different tillage methods on soil humus:4kinds of farming in the way of the CT, ST, NT and AP, the absolute carbon content of soil HE and HA are the surface above the bottom.Regulations farming surface and the underlying soil PQ value is not obvious, but no-tillage, autumn turned PQ value of the three kinds of tillage and subsoiling are greater than in the underlying surface, indicating that these three kinds of farming methods, the underlying soil humification than high. For surface soil, no significant difference in PQ values of the various farming methods.The amount of the organic carbon content of a direct impact on soil fertility, thereby affecting the growth of crops, this study analyzed the differences in the ability of agricultural soil carbon sequestration in different farming methods designed to reduce future for China’s farmland CO2gas emissions and enhance carbon sequestration capacity reasonable farming practices.