小麦-水稻轮作下施用钢渣对酸性土壤的改良效果

The Improvement Effect of Steel Slag Application on Acidic Soil under Wheat-rice Rotation System

[目的]研究施用钢渣对小麦-水稻轮作制度下酸性土壤的改良效果。[方法]研究了钢渣施用对小麦-水稻轮作下作物产量、土壤pH的影响,以及土壤pH和土壤养分的相关性。[结果]与当季对照相比,第一季种植小麦后土壤pH上升0.17~1.00,第二季种植水稻后土壤pH上升0.36~2.21,第三季种植小麦后土壤pH上升0.56~2.68,第四季种植水稻后土壤pH上升0.80~2.41。从第三季开始,连续施用钢渣处理的土壤有机质含量相对对照逐渐下降。钢渣施用可以显著增加小麦产量,但连续施用对水稻无增产效果。与当季对照相比,施用钢渣后,第一季小麦增产215.81%~504.65%,第三季小麦增产22.69%~37.78%。[结论]施用钢渣能提高小麦-水稻轮作制度下酸性土壤的pH,增加小麦产量。

[Objective]To explore the improvement effect ofsteelslag application on acidic soil under wheat-rice rotation system. [Method]The effect of steel slag application on cropyield and soil pH, thecorrelation between soil nutrient and soil pH were studied.[Result]Compared to the control, after planting the first season of wheat soil pH increased by 0.17-1.00 , after planting the second season ofrice soil pH increased by 0.36-2.21, after planting the thirds season of wheat soil pH increased by 0.56-2.68, after plantingthe fourth season ofrice soil pH increasedby 0.80-2.41. From the third season, the soil organic matter content of the successive application of steel slag decreased gradually compared with the control. The application of steel slag significantly increased the yield of wheat, but the continuous application did not increase the yield of rice. Compared with season control, after the application of steel slag,wheat yield increased by 215.81%-504.65% in the first season, the yield increased by 22.69%-37.78% in the third season. [Conclusion]Steel slag can increase the pH of acid soil and the yield of wheat under the system of wheat-rice rotation.