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.
ZHANG Guang-xing, YU Dong-sheng, ZHANG Zhong-qi, WANG Xing-xiang, SHI Xue-zheng
. Cultivated land Quality Evaluation Methods Based on Bio-Norm and EO[J]. SCIENTIA GEOGRAPHICA SINICA, 2011
, 31(8)
: 1012
-1018
.
DOI: 10.13249/j.cnki.sgs.2011.08.1012
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