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通过土壤网格取样、室内分析及 ASI施肥推荐等方法 ,在地理信息系统支持下 ,建立了区域土壤养分分区管理模型。该模型以土壤空间变异为基础 ,地统计学为手段 ,土壤分块管理为目的 ,考虑了土壤的空间变异和我国农村分散经营的实际 ,可为土壤养分管理提供合理的施肥量 ,也可为区域养分管理提供宏观决策。通过对河北省辛集市马兰试验区的实施与验证 ,在 Arc Info平台上 ,用土壤养分分区管理模型进行施肥推荐 ,同时给出整个区域的土壤养分分布图、分区土壤养分分级图、土壤养分管理图和养分施用推荐表等。它既避免了土壤养分空间变异性所造成的施肥推荐偏差 ,又能考虑土壤养分严重缺乏的地块 ,使土壤养分管理趋于更加合理。
Based on soil grid sampling, indoor analysis and ASI fertilization recommendation, a regional soil nutrient zoning management model was established with the support of GIS. The model is based on the spatial variability of soil, geostatistics as a means, and soil sub-block management. Taking into account the spatial variability of soil and the reality of rural decentralized management in our country, this model can provide reasonable fertilization for soil nutrient management, Regional nutrient management provides macro decisions. Through the implementation and verification of Malan Experimental Zone in Xinji City, Hebei Province, the soil fertility management model was applied to recommend fertilization on the Arc Info platform. At the same time, soil nutrient distribution maps, zonal soil nutrient classification maps, soil nutrient management maps Figure and nutrient application recommended form. It not only avoids the fertilization recommendation deviation caused by the spatial variability of soil nutrients, but also considers the mass of soil nutrient shortage, making soil nutrient management more reasonable.