摘要
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。
Soil samples were collecte d from the gravel mulched field, planting watermelon for different years, in Xiangshan area of Ningxia Province. Soil organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus, available potassium, available nitrogen, and soil texture were tested to evaluate the fertility condition of the gravel mulched field. The weight and membership degree were calculated by the comprehensive assessment of soil quality to compare the overall fertility conditions. The results showed that the limited factors of soil fertility were available phosphorus, available nitrogen, soil organic matter and total nitrogen in the study area. The fertility grading was the third in the early stage of the gravel mulched field. And it reduced to the forth when the field was mulched with gravel for 7 years. These results could provide theoretical basis and rationalization proposal for making full use of soil nutrient resources, reducing the fertilizer cost, maintaining the nutrient balance, and sustaining the development of the soil ecosystem.
出处
《土壤通报》
CAS
CSCD
北大核心
2015年第1期36-41,共6页
Chinese Journal of Soil Science
基金
国家自然科学基金项目"宁夏中部干旱带压砂地土壤演化机理研究"(41161085)资助
关键词
压砂地
土壤肥力
评价
Gravel mulched field
Soil fertility
Evaluation
