保水剂对晋西黄绵土土壤性状和玉米生长的影响OA

The application of water-retaining agents is an important measure to effectively improve soil water retention capacity.Coal gangue and fly ash can both enhance the physical structure of soil and increase its aeration.To investigate the impact of combined application of water-retaining agents with coal gangue and fly ash on the improvement of loess soil in western Shanxi,corn was used as the research object.Field trials were conducted with four treatments:potassium polyacrylate and coal gangue(W1),potassium polyacrylate and fly ash(W2),potassium polyacrylate alone(W3),and no water-retaining agent(CK).The effects of different treatments on the hydraulic properties,aggregate stability,and corn growth in loess soil in western Shanxi were analyzed.The results showed that treatments W1 and W2 significantly improved soil water retention,with W1 increasing the water content in the 0～60 cm layer by 3.2%to 35.2%compared to CK,and the saturated hydraulic conductivity by 63.4%,reaching 7.9 cm/h.The cumulative infiltration amount over 90 minutes was the highest at 43.4 mm.Treatment W1 also promoted the formation of water-stable aggregates(>2 mm),accounting for 36.4%,which increased by 73.3%compared to CK.Although treatment W3 showed significant improvements in hydraulic properties compared to CK,its effect was less pronounced than that of W1 and W2.At the twelfth leaf stage,the height and stem diameter of corn plants under treatment W1 increased by 36.0%and 17.4%,respectively,compared to CK,with a yield of 12 018.7 kg/hm² at maturity,representing a 73.3%increase over CK.Treatment W3 had the most significant increase in grain number per ear compared to CK,with a 29.1%improvement.The comprehensive analysis shows that the combination of potassium polyacrylate and coal gangue can significantly improve the soil structure in the loess region,and provide a feasible technical solution for high yield and stable yield of corn in arid regions.