Research On Combined Application Of PAM And SAP On Keeping Soil And Water For Sloping Lands In Dryland Areas

As two types of soil chemical regulation materials with significant soil fixing and runoff interception capability and soil water retention capability repectively,PAM and SAP are of great moment to water and soil loss prevention,ecologic environment protection,high efficient agricultural water use and crop yield increase and so on.At present,the studies on PAM and SAP are mainly concentrated on single material according to its functions and its application conditions,while the studis on combined application of PAM and SAP for sloping farmland in arid areas have not been reported.This academic paper takes five different ways of combined application:PAM surface coating+SAP mixed(0-20 cm);PAM surface application + SAP layer(20 cm);PAM surface spray +SAP mixed(0-20 cm);PAM surface spray+SAP layer(20 cm);PAM mixed + SAP mixed.Six SAP applications and six PAM applications:ck,1,2,3,4,5 kg/mu.Two kinds of gradient:5 ° and 7 °.1.Effects of PAM and SAP Combined Application on Soil Water Cutoff in Sloping LandsPAM and SAP Combined Application can effectively improve the soil-cutting capacity of sloping land in arid area and show the trend of increasing soil water cut capacity with the increase of application amount.But only when the SAP layer is applied,there is no change due to changes in SAP usage.PAM mainly affects soil erosion in soil erosion,while SAP mainly affects surface runoff.In the five modes of application,PAM mixing and SAP mixing can significantly enhance the ability of soil cutting capacity.When PAM and SAP are applied to the 7° soil slot,they can achieve better results at the same time.2.Effects of PAM and SAP on Water Conservation in Sloping LandsAfter applying PAM and SAP after soil and artificial rainfall,then measure the soil moisture content,Soil layers were significantly improved,and soil moisture content increased with the increase of application amount.At the same time,soil water holding capacity increased and seepage decreased.SAP to improve soil water conservation capacity than PAM more significant The influence of SAP layer is in the 15-30cm soil layer,while the influence of SAP is in the range of 0-25cm soil layer.Among the five different ways of combined application,,PAM mixing and SAP mixing are the best choice to improve soil moisture content,soil water holding capacity and reduce seepage,.At different diameters,the slope increased and the soil water content increased,but the soil water holding capacity did not increase and the seepage was not reduced.3.Effects of PAM and SAP Combined Application on Soil Nutrients in Sloping LandsWith the increase of PAM and SAP application,the total nitrogen and total phosphorus contents decreased,and the total nitrogen and total phosphorus.The five methods of application are also PAM mixed and SAP mixed to maximize the soil nutrient retention.There was no change in the amount of soil nutrients on both slopes,so the increase in slope did not affect the changes in soil nutrients by PAM and SAP.