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将近期采集的土壤样品各指标与第2次土壤普查结果进行了分析比对,在分析聊城市20年来集约经营投入变化的基础上,讨论了经营集约度对土壤质量的影响。选择施肥量、机械总动力、农药投入量等指标反映土地利用集约度的变化。结果表明:大量化肥的施用,提高了土壤的养分供给水平,提高了土壤质量级别,但速效钾含量降低、变异性加大,同时也导致化肥产出率逐年降低;机械化水平的不断提高,使土壤容重增加,孔隙度减小;管理措施不一致、农业结构调整等因素导致速效养分、有机质等土壤质量特征的区域性差异加大。
The soil samples collected recently were compared with the results of the second soil survey. Based on the analysis of the changes of the intensive management inputs in Liaocheng City in the past 20 years, the effects of the management intensities on the soil quality were discussed. Choosing the amount of fertilizer, the total mechanical power, the input of pesticides and other indicators reflect the changes in land use intensity. The results showed that the application of a large amount of chemical fertilizers increased soil nutrient supply and soil quality, but the content of available potassium decreased and the variability increased. At the same time, the yield of fertilizers decreased year by year. The continuous improvement of mechanization Increased soil bulk density and porosity decrease; inconsistent management measures and adjustment of agricultural structure lead to more regional differences in soil quality characteristics such as available nutrients and organic matter.