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以宁夏环香山压砂瓜种植区的使用不同年限的压砂地为研究对象,田间尺度取样,选择压砂地土壤有机质、全量氮磷钾、速效磷钾、碱解氮、土壤质地为评价指标,通过常规的测试获取数据,采用土壤综合质量评价法,计算评价指标的权重及隶属度值,比较各项肥力指标在试验区土壤中的整体状况,对不同使用年限的压砂地进行肥力等级划分,发现有效磷、碱解氮、有机质和全氮为本研究区土壤的限制因子,压砂地使用前期土壤肥力为三等,7 a之后土壤肥力为四等。研究结果可为压砂地培肥土壤、充分利用土地养分资源、合理投入化学肥料节约成本、维护土壤生态系统养分平衡和可持续发展提供理论依据和合理化建议。
Taking sand plantations with different years in Huanghuashan pressed sand cultivation area of Ningxia as the research object, soil organic matter, total nitrogen, phosphorus, potassium, available phosphorus and potassium, alkaline hydrolysis nitrogen and soil texture were selected as the evaluation indexes by field sampling, Routine tests to obtain data, the use of integrated soil quality assessment method to calculate the weight of the evaluation indicators and membership values, compare the overall status of fertility indicators in the soil test area, the pressure of different years of sand pressure classification and found that Available phosphorus, available nitrogen, organic matter and total nitrogen are the limiting factors of the soil in the study area. The soil fertility of the pre-stressed sand soil is third-class and soil fertility is fourth-class after 7 years. The results can provide theoretical basis and reasonable suggestions for fertilizing the soil in the sandstash, making full use of the nutrient resources in the land, saving chemical fertilizers rationally, maintaining nutrient balance and sustainable development of the soil ecosystem.