摘要
论文以位于陕西关中平原腹地的杨凌为研究区域,以28个田块为采样的基本单元,选用土壤化学指标,运用模糊层次分析法确定评价指标的权重,并用模糊集理论中的贴近度和隶属度概念来识别土壤肥力质量,探讨基于田块尺度的土壤肥力评价方法。结果表明,评价结果与研究区域耕地的实际情况基本吻合。采用基于层次决策分析权重的模糊评价方法进行田块尺度上的土壤质量评价具有可操作性和可行性。
In order to improve accuracy of assessment of cultivated land quality and make evaluation results reflect the changes of cultivated land quality,the fuzzy assessment method of soil fertility based on field scale was studied.Taking Yangling area of Guanzhong Plain in Shaanxi Province as an example,the chemical indicators were selected;using the method of fuzzy analytic hierarchy process（FAHP）,the weights of indicators were calculated;finally the fuzzy comprehensive appraisement of soil quality was developed.Using the method mentioned above,the evaluation results were recognized by maximum subordination principle and closeness degree,and the soil quality of 28 field plots was evaluated.In the identical area with identical way of use,the soil quality of topsoil（0-20 cm） is higher than the subsoil（20-40 cm） and in different ways of use,soil quality of the orchard is higher than that of the field generally.The results showed that the evaluation results matched basically with real situation of cultivated land in the study area.Using the same method to calculate factor weights,the indexes which the factor weights were less than 5% were eliminated.Generally,the results were similar under two different factor sets and showed that indexes were selected by the weights in order to make the evaluation process more simple and accurate.The study indicated that the method of fuzzy comprehensive appraisement of soil quality based on FAHP was feasible under field scale.
出处
《自然资源学报》
CSCD
北大核心
2009年第8期1422-1431,共10页
Journal of Natural Resources
基金
"十一五"国家科技支撑计划项目课题(2006BAD05B07
2006BAD25B09)
关键词
田块尺度
土壤质量
模糊层次分析法
贴近度
模糊评价
field scale
soil quality
fuzzy analytic hierarchy process（FAHP）
closeness degree
fuzzy comprehensive appraisement
