摘要
以江西省余江县为研究区域,利用专家经验法(expert opinion,EO)和新建的Bio-Norm法,分别确定耕地质量评价指标、指标权重和隶属度函数,对研究区水田耕地质量进行评价。两种评价方法的对比分析表明,采用EO法时不同专家组选取的参评指标不尽相同,评价结果具有不稳定性。Bio-Norm法得出的指标权重及确定的隶属度函数临界值,比起EO法更能反映水稻生长的实际要求;耕地质量综合指数(IFI值)与水稻产量回归方程的决定系数(R2)高于EO法,且IFI值与水稻产量各等级区域分布特征更吻合。采用Bio-Norm法评价耕地质量更为科学合理。
Quality evaluation of cultivated land is important in the guidance of agricultural production.Whether the evalution method is appropriate or not directly affects the scientificity of evaluation results.Through practical investigation,sample collection,and analysis,a total of 249 surficial paddy soil property data and 95 rice production data were collected in the study area of Yujiang County,Jiangxi Province.Expert opinion and the newly established Bio-Norm method were used to determine indicators,indicators＇ weight,and their relationship functions respectively,and then to evaluate the quality of paddy field land of the study area.The comparison between Bio-Norm method and EO showed that EO method was unstable,and the indicators selected by Bio-Norm method were more representative than that of EO method.The weights obtained from Bio-Norm method could better accurately reflect the importance of indicators.The relationship functions of Bio-Norm method could better reflect the actual requirements of rice growth.Evaluation results showed that regression coefficient of determination（R2） between cultivated land quality index（IIFI value） obtained from Bio-Norm method and rice yield was far higher than that of EO method,and the distribution of IIFI value obtained from Bio-Norm method and rice yield was more consistent in the region than that of EO method.Therefore,the Bio-Norm method is more scientific and reasonable than the EO method in evaluating the quality of cultivated land.
出处
《地理科学》
CSCD
北大核心
2011年第8期1012-1018,共7页
Scientia Geographica Sinica
基金
中国科学院知识创新工程项目(KSCX1-YW-09-01&02,KZCX2-YW-Q1-07)
国家重点基础研究发展计划“973”项目(2010CB950702)资助
