Deep Loosening Building Block Of Black Soil Farmland Nitrogen And Phosphorus Nutrient Erosion Resistance Control Effect Research

Now increasing agricultural production scale,the total arable land proportion of sloped farmland area is larger,which caused by rainfall or irrigation farmland soil erosion phenomenon is increasingly serious.Surface runoff will not only farmland nitrogen,phosphorus and other nutrients in the carrying out of the farmland,causing farmland nutrient loss,and should exist in the nutrients in the soil with the surface runoff into the water,causing eutrophication of water bodies such as the environment.This article will be applied to the deep loosening of agricultural production in combination with building block technology applied in the prevention and treatment of farmland soil and water loss.The results showed that:(1)Deep loosening and building block processing were higher than conventional treatment of maize yield.Visible,respectively,to carry on the deep loosening and building block processing can promote the growth of maize,and the application of deep loosening building block processing can better improve maize growth and development,increase maize yield.Deep loosening building block processing corn 8.02% higher than normal processing maize yield.(2)This study result shows that the deep loosening building block technology can been rain,restrict the flow of surface runoff,reducing surface runoff erosion,reduce soil and water loss,control surface runoff into the surrounding water migration,runoff erosion and runoff and sediment erosion related to the size and intensity of rainfall.And building,the more the number of soil block held runoff amount and runoff and sediment,the greater the maximum held 74.44% of the runoff erosion,runoff and sediment loss of 94.22%.For better dammed-up black soil slope surface runoff.(3)Deep loosening up to block the highest lowers total phosphorus in the black soil farmland surface runoff,soluble phosphorus and particulate phosphorus concentration of 58.19%,64.19% and 55.02%.Pine building block can reduce the concentration of total nitrogen in farmland surface runoff,mainly by intercepting drain water.Trapped and water soluble nitrogen by adsorption and surface soil particles with two ways to retain moisture infiltration in soil,mainly to increase the soil 0-20 cm soil total nitrogen and available nitrogen content.Of soluble nitrogen to total nitrogen loss of 89.11% ~ 91.83%,Is the main formation of black soil farmland nitrogen loss.(4)Soil block limits the surface runoff flow path,and promote the soluble phosphorus adsorption in the soil particles on runoff,deep loosening measures increased the soil porosity,make it easier for soluble phosphorus with water infiltration into the soil,increase the phosphorus content in the 0 ~ 40 cm soil layer,concentration of soluble phosphorus in runoff decrease more.The high level of the deep pine can reduce the total phosphorus,soluble phosphorus and phosphor concentration in the land surface runoff of black soil slope,which is 58.19%,64.19% and 55.02%.Take away a lot of soil and water loss of soil particles at the same time will take away a large number of adsorption on the surface of the soil clay in this study the processing particles state of phosphorus accumulation loss are accounted for more than 60% of the total phosphorus accumulation loss,can draw particles state of phosphorus is the main form of loss of farmland phosphorus removal of black conclusion.Block reservoir p mainly accumulated in 0 ~ 20 cm soil layer.