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调查研究了宁夏果树设施栽培土壤的物理和化学性状,并用传统统计方法分析了不同肥力因子的变异特征。结果表明:设施果树栽培土壤的容重增大10%以上,总孔隙度小于正常水平;灌淤土养分状况良好,有机质及速效氮、磷、钾含量均较高,尤其是速效磷在土壤中的积累较多;6个主要肥力指标的变异系数大小顺序为:碱解氮>速效磷>速效钾>全盐>有机质>pH值;为了增强测土配方施肥的精确性,土壤pH值、有机质、全盐和速效钾的采样数量可适当减少,而速效氮、磷的采样数量应增加。
The physical and chemical properties of the cultivated soils of Ningxia fruit trees were investigated. The variation characteristics of different fertility factors were analyzed by traditional statistical methods. The results showed that the capacity of planting fruit trees increased by more than 10% and the total porosity was less than normal. The nutrient status of silt soil was good, and the contents of organic matter and available nitrogen, phosphorus and potassium were high, especially the available phosphorus in the soil The order of variation coefficient of six major fertility indices was as follows: alkaline hydrolysis nitrogen> available phosphorus> available potassium> total salt> organic matter> pH value. In order to enhance the accuracy of soil testing and fertilization, soil pH value, organic matter, Total salt and available potassium sampling may be appropriate to reduce the number of available nitrogen, phosphorus, the number of samples should be increased.