RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (2): 223-227.

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COMPREHENSIVE EVALUATION OF SOIL FERTILITY FOR CULTIVATED COMPREHENSIVE EVALUATION OF SOIL FERTILITY FOR CULTIVATED

NIE Yan， ZHOU Yong，YU Jing，HE You-yong   

  • Received:2005-06-22 Revised:2005-07-25 Online:2006-03-20
  • Contact: NIE Yan

Abstract: By introducing the nichefitness theory into comprehensive evaluation of soil fertility on cultivated land, an evaluation method of integrated soil fertility, using GIS and the soil basal nichefitness model (SBNFM), was developed and used in the Houhu Area of Jianghan Plain. The factors affecting the level of cultivated land fertility and their weight were decided. According to the scenario, soil samples were collected and analyzed. After standardizing soil data, the soil basal nichefitness value of every unit was calculated, which is remarkably lineary interrelated with the rice yield. With Analytical Hierarchy Process, soil fertility was divided into 4 classes in this area. By ArcGIS, the map of soil comprehensive fertility in Houhu Area was drawn. It is indicated that the soil fertility level in this area is in medium and high side, the percentages of area in levels 1,2,3 and 4 amount to 33.430%，35.990%，22.701%and 7.879% respectively. On the other hand, the introduction of soil basal nichefitness model is an exploration for soil fertility evaluation, which has much theoretical and practical meanings to agricultural production.

Key words: soil fertility, soil basal nichefitness, comprehensive evaluation, GIS

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