Effects of No-Tillage with Straw Mulching on the Physicochemical Properties of Soil and Soil Erosion in Sloped Agricultural Land
To investigate the effects of straw mulching combined with no-till farming on the physicochemical properties of soil and the benefits of soil and water conservation,field experiments were established comparing straw-covered no-till and tradi-tional tillage practices.The study examined soil pore structure,soil moisture content,chemical properties,as well as run-off and sediment yield.The results showed that,following the straw mulching and no-till treatment,soil density at a depth of 0＜h≤10 cm increased by 14.16%,while the total porosity and non-capillary porosity decreased by 10.85%and 27.11%,respectively.At the depth of 0＜h≤20 cm,the loss of soil organic matter and total nitrogen was reduced,which effectively improved soil nutrient content and distribution.Soil moisture content at depths of 10,20,30,and 40 cm in-creased by 6.30%,5.78%,7.57%,and 9.03%,respectively.Under the same rainfall conditions,the deeper the soil lay-er,the shorter the soil moisture retention time.The straw mulching and no-till treatment weakened the impact of rainfall erosion on runoff and sediment yield,with a significant reduction in the frequency and quantity of runoff and sediment com-pared to traditional tillage.The number of runoff and sediment events decreased by 3 and 5 times respectively,while the amounts of runoff and sediment decreased by 53.07%and 71.87%.Overall,straw mulching combined with no-till farming effectively reduces the driving force of rainfall on runoff and sediment yield,minimizes the loss of soil organic matter and nitrogen,and helps regulate soil structure.
Straw mulchingSloped agricultural landPhysicochemical properties of soilWater and soil erosion
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