| The quality of cultivated land in Huainan was comprehensively evaluated by selecting 15～18 indexes from 6 aspects of site condition, profile character, surface physical and chemical properties, soil nutrient, health condition and farmland management, and analyzing its spatial distribution characteristics and main influencing factors. The results showed that the total area of cultivated land in Huainan was 349 170.18 hm2, the average 〖JP2〗cultivated land quality grade was 3.70, the proportion of high yielding land (grade 1 to 3) was 50.67%, the proportion of middle yielding land (grade 4 to 6) was 44.79%, and the proportion of low yielding land (grade 7 to 8) was 4.54%. There was obvious correlation between the spatial distribution of cultivated land quality and the distribution of soil type. The average values of organic matter, available phosphorus and available potassium in cultivated land were 24.5 g/kg, 27.68 mg/kg and 140 mg/kg, respectively, all in the medium level. The content of main nutrients in cultivated land with higher quality grade was also relatively high. The main indexes affecting cultivated land quality were irrigation capacity, drainage capacity, terrain position and soil nutrient content. |
