多种模型集成的方法在土壤养分评价中的应用

Application of integrated models in evaluating soil nutrients

在吉林省西部长岭县农业生态环境调查的基础上,通过对土壤中有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾等营养成分进行采样、化验和分析,先用聚类分析模型确定了评价单元,然后用层次分析模型确定了评价因子权重,最后采用模糊综合评价模型进行了土壤养分的综合评价.结果表明,采用多模型集成的方法评价区域土壤养分,结果准确、可靠;长岭县土壤养分水平可分为四类,总体肥力水平较低,养分处于贫乏状态,且分布上呈东高西低的分布规律.

On the basis of the investigation of agriculture eco-environment in Changling County, the organic matter, total N, total P, total K, available N, available P and available K in the soil were tested and analyzed. The Cluster analysis model and AHP model were used to ascertain the evaluating cell and the weightiness of evaluating element, the Fuzzy model was used to evaluate the level of soil nutrients. The result showed that the soil nutrients could be evaluated credibly and exactly by the integrated models. The level of soil nutrients in Changling County was classified into four kinds. The total fertility and nutrients in the soil were smallness. The soil nutrients in east part of county were higher than in that in the west part.