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《Journal of Fujian Agricultural University(Natural Science)》 2002-03
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Quality evaluation of regional cultivated land based on GIS

XING Shi he 1, HUANG Ji 1, HUANG He 2, MAO Yan ling 1(1.College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; 2.Technological Station of Soil and Fertilizer, Fujian Agricultural Depart  
The major evaluating factors and their weights to assess the quality of regional cultivated land were selected and determined by progressive multiple regression analysis based on the data of field investigation and soil analysis of the representative plots of cultivated land, and then the quality of regional cultivated land was evaluated by GIS technology and dynamic cluster analysis. The results showed that 8 factors, including organic matter content, ≥10 ℃ accumulated temperature, road unobstructed degree, CEC, slope, texture, underground water depth and total potassium content, were most closely related to crop yields of cultivated land so that these 8 factors could be used as major evaluating factors to assess the quality of regional cultivated land. Organic matter content, ≥10 ℃ accumulated temperature, road unobstructed degree, CEC and slope among 8 factors would greatly affect the quality of cultivated land as the sum of their weights were more than 80% of the total. The overall qualities of cultivated land resources were rather low in Minhou County. The areas of cultivated land with middle and lower yields were 68.01% of the total. The major limiting types of cultivated land were sand, clay, low temperature and poor nutrients. The areas under these limiting types were 25.04%, 12.58%, 12.17% and 15.27% of total cultivated land, respectively. The united methods of GIS and mathematical model could provide the best way to evaluate the quality of regional cultivated land quickly, precisely and dynamically.
【Fund】: 福建省自然科学基金资助项目 (B0 0 10 0 18)
【CateGory Index】: F301
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