【摘要】 为了揭示冀东褐土养分肥力特征,指导土壤养分资源的科学管理和合理施肥,采用田间典型样品调查、室内分析相结合的研究方法,通过主成分分析和聚类分析等数学手段,对冀东地区褐土养分资源的综合评价指标与管理对策进行研究。结果表明,冀东褐土养分资源可以采用氮素养分供应强度和生物学活性、土壤供钾潜力、土壤有机质积累强度为主体的综合指标进行评价,养分资源的特点总体表现为有机碳、全氮含量较低,钾素长期供应潜力下降,全磷和有效磷含量较高。施肥和肥力管理原则应首先注重有机肥(物)料的施用以保持和提高土壤有机碳和全氮水平,其次为增强土壤供钾潜力,化学肥料的施用适宜于N、K、P顺序。动态聚类分析表明,冀东褐土养分肥力水平可分为5类,在生产实践中应根据各类肥力特点,有针对性地制定土壤养分肥力管理方案,以达到养分资源的高效利用目的。更多还原

【Abstract】 In order to reveal nutrient fertility characteristics in cinnamon soil in eastern Hebei Province and guide scientific management of soil nutrient resources and rational fertilization,field typical samples investigation combination with indoor analysis research methods,principal components analysis and cluster analysis were applied in this paper to study the comprehensive evaluation index and management countermeasures of nutrient resource in cinnamon soil.The results showed that:cinnamon soil nutrient resources could use nitrogen nutrient supply strength and biological activities,soil potassium potential,soil organic matter accumulation strength as the main body of the comprehensive index to evaluate.The characteristics of the nutrient resources totally showed that,organic carbon,total nitrogen content was low,long-term potassium supply potential declined,while total phosphorus and effective phosphorus content was high.Fertilization and fertility management should first pay attention to organic fertilizer (material) to keep and improve soil organic carbon and total nitrogen level,next to enhance soil potassium potential.Chemical fertilizer application was suitable for N,K,P in order.Dynamic clustering analysis showed that,nutrients fertility levels of cinnamon soil could be divided into 5 kinds,in the production practice should be based on the characteristics of all kinds of fertility,formulated target-oriented soil nutrient fertility management plan,in order to use nutrient resources efficiently.更多还原