Effects of No-till on Soil Carbon Components and Physicochemical Properties Under Different Wheat-Maize Rotation Fields
In order to investigate the effects of tillage and crop rotation on soil physicochemical properties and carbon components,an field experiment was conducted,in which two tillage modes(no-tillage and traditional tillage)and three planting modes(wheat-maize rotation,wheat/maize intercropping,wheat-winter rapeseed-maize rotation)were deigned.The results showed that compared with traditional tillage,no-tillage increased total nitrogen,total phosphorus,available phosphorus and water content in 0-5 and 5-20 cm soil layer,but decreased soil pH and bulk density.Soil bulk density,water content,total nitrogen and total phosphorus under no-tillage and wheat/corn intercropping(NT.W1/NT.WM.1)were higher than those under no-tillage and wheat-corn-winter rapeseed rotation(NT.WRM3)and no-tillage and wheat-corn rotation(NT.WM5).The contents of total nitrogen,total phosphorus and available phosphorus decreased with the increase of soil depth.Soil carbon content under no-tillage treatment was higher than that under traditional tillage treatment.Compared with traditional tillage treatment,the contents of soil organic carbon,particulate organic carbon,soluble organic carbon and microbial biomass carbon in 0-5 cm soil layer were increased by 1.31%-36.57%,2.07%-35.22%,2.38%-4.78%and 2.08%-11.68%,respectively.The contents of soil organic carbon and microbial biomass carbon under no-tillage treatment in 5-20 cm soil layer were higher than those under traditional tillage treatment.Under different no-tillage treatments,the contents of soil organic carbon,particulate organic carbon and microbial biomass carbon in 0-5 and 5-20 cm soil layers under NT.WM5 were higher than those in other no-tillage treatments.Correlation analysis showed that soil organic carbon,microbial biomass carbon and available phosphorus were positively correlated,while bulk density and organic carbon content were negatively correlated.In conclusion,no-tillage and wheat/maize intercropping can improve soil physicochemical properties,and no-tillage and wheat-maize rotation can increase soil organic carbon,particulate organic carbon and microbial biomass carbon content.
No-tillageSoil carbon componentPhysical and chemical properties of soilCrop rotation pattern
万方数据
维普
