Taking Yucheng City, Northeast district of Shandong Province, as our study area, this paper intended to develop quantitative methods for soil nutrient depletion evaluation and to target its limiting factors. Based on the extensive information obtained by field-survey, soil sampling and lab analysis, the quantitative evaluation procedure and diagnosis of soil nutrient depletion limiting factors was realized by adopting the improved Grey Relation Model, the Model of limiting factors diagnosis and supported by GIS techniques. The Grey Relation Model was improved by utilizing Analytical Hierarchy Program and"Threshold Samples". The level of diagnosis of soil nutrient depletion, limiting factors and their spatial distribution information were acquired by Kriging interpolation, and the results were consistent with local conditions according to field-survey and lab analysis. The approach was feasible and effective in soil nutrient depletion, limiting factors diagnosis. This research contributes significantly to scientific management and sustainable use of soil nutrient depletion, limiting factors diagnosis and provides consults to improve soil quality.
YANG Qi-yong, YANG Jing-song, YAO Rong-jiang, HUANG Biao, SUN Wei-xia
. GIS-based Evaluation of Soil Nutrient Depletion and Analysis of Its Limiting Factors in Yucheng City[J]. JOURNAL OF NATURAL RESOURCES, 2010
, 25(8)
: 1375
-1384
.
DOI: 10.11849/zrzyxb.2010.08.014
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