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为了探明砂田土壤质量随压砂年限增加的变化趋势,提高宁夏中部干旱带压砂地的可持续利用,以宁夏兴仁镇红圈子村不同压砂年限(1、3、5、7、10、20、30a)的荒地压砂土壤为研究对象,运用单因素方差分析和Pearson相关分析对不同压砂年限土壤理化性质进行了研究。结果表明:土壤水分、毛管持水量、饱和持水量、毛管孔隙度、总孔隙度、10℃饱和导水率都随着压砂年限的增加呈明显下降趋势,土壤容重则表现出上升趋势;土壤pH值随压砂年限的增加变化不显著;土壤有机质、全盐、全磷、全钾、全氮、速效磷、速效钾、硝态氮含量则随压砂年限的增加呈明显下降趋势;土壤理化性向劣质化方向发展。因此,在耕作的过程中必须进行科学合理的施肥与耕作,才能保证砂田的持续利用。
In order to find out the change tendency of sandy soil quality with the increase of sand age, and to improve the sustainable utilization of sand land under drought in central Ningxia, 20,30a) were selected as the research objects. The soil physical and chemical properties under different years of sandblast were studied by single factor analysis of variance and Pearson correlation analysis. The results showed that soil moisture content, capillary water holding capacity, saturated water holding capacity, capillary porosity, total porosity and saturated hydraulic conductivity at 10 ℃ all decreased with the increase of sand pressure, while soil bulk density showed an upward trend. Soil The pH value did not change significantly with the increase of sand age. The content of soil organic matter, total salt, total phosphorus, total potassium, total nitrogen, available phosphorus, available potassium and nitrate nitrogen decreased obviously with the increase of sand age. Physical and chemical properties to the poor direction of development. Therefore, in the process of farming must be scientific and rational fertilization and farming, in order to ensure the sustainable use of sand fields.