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    南平烟区植烟土壤理化性状聚类分析与施肥对策

    Cluster Analysis on Tobacco-growing Soil Nutrient Characteristics and Fertilization Strategy for Nanping

    • 摘要: 为了加强烤烟平衡施肥的分类指导和制定烤烟专用肥配方提供依据,根据烤烟种植面积分布,采集了南平烟区植烟土壤样品1101份,测定了主要理化性状,并运用聚类分析进行综合评价。结果表明,南平烟区植烟土壤偏酸,质地主要为壤土,交换性镁、有效铁、有效锰、有效铜含量丰富,有机质、全氮、全磷、速效磷、有效硫、有效锌含量中等,碱解氮、速效钾、交换性钙、水溶性氯含量较低,全钾、有效硼含量低。土壤pH变异最小,变异系数为7.71%;速效磷、水溶性氯和有效硼变异较大,变异系数分别达到80.30%、77.90%和75.87%。南平烟区植烟土壤可分成5个类群,各类群土壤均应施用氧化钙或与氧化镁交替施用调节pH。烤烟施肥上,第Ⅰ类群土壤应“控氮增钾,适磷补硼”,第Ⅱ类群土壤应“适氮增钾,补磷控硫”,第Ⅲ类群土壤应“适氮磷,重施钾,补硼氯”,第Ⅳ类群土壤应“适氮增钾,控磷硫,补硼氯”,第Ⅴ类群土壤应“适氮控磷增钾,补硼氯”。

       

      Abstract: In order to enhance the classified instruction of tobacco balanced fertilization and provide the basis for drafting tobacco specialty fertilizer formula, based on the planting area distribution, the physical and chemical characters in 1101 soil samples collected from tobacco-growing areas in Nanping were analyzed, and the cluster analysis was processed for comprehensive evaluation, The results showed that the tobacco-growing soil in Nanping was slightly acid, most soils texture was loam; exchangeable Mg, available Fe, Mn and Cu were rich; organic matter, total N, total P, available P, available S, available Zn were moderate; available N, available K, exchangeable Ca, water-soluble chlorine were relatively low; total K and available B were low. The variation coefficient (7.71%) of pH was the lowest. Large variation existed among the content of available P, water-soluble Cl and available B, with CV of 80.30%, 77.90% and 75.87%, respectively. The soil of tobacco-growing in Nanping could be divided into 5 categories. The alternative use of calcium oxide and magnesium oxide could adjust pH values in the different soil types. On the different fertilization of tobacco, the first category was controlling N, increasing K, P-sufficient and supplying B; the second category was N-sufficient, increasing K, supplying P and controlling S; the third one was an appropriate rate of N and P, a high rate of K, supplying B and Cl; the forth category was an appropriate rate of N, increasing K, controlling P and S, supplying B and Cl; the fifth category was an appropriate rate of N, controlling P, increasing K, supplying B and Cl.

       

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