关键词: 耕地, 有效铜, 有效锌, 有效铁, 有效锰, 空间分布, 利川市

Abstract: Soil pH and the contents of available Cu, available Zn, available Fe, available Mn and organic matter in the 604 samples of cultivated land in Lichuan city, Hubei province, were detected and analyzed. The results showed that the average pH of cultivated land soil in Lichuan city was 6.21±1.15, ranged from 3.95 to 8.58, and variable coefficient was 18.49%, with a moderate weak variant. The content of organic matter was（27.17±10.84） g/kg, ranged from 5.39 g/kg to 88.50 g/kg, and variable coefficient was 39.90%, with a medium variant. The average contents of available Cu, available Zn, available Fe, available Mn were（1.39±1.31） mg/kg,（1.07±0.92） mg/kg,（58.84±52.67） mg/kg,（39.22±32.49） mg/kg, respectively; According to the local standard evaluation of DB 21/T 1437-2006 in Liaoning province, the contents of available Zn was in the middle levels, and the other three kinds were high content. The contents of available Cu, available Zn, available Fe, available Mn ranged from undetected to 8.28 mg/kg, undetected to 8.41 mg/kg, 2.89 mg/kg to 311.15 mg/kg, 3.29 mg/kg to 234.38 mg/kg, respectively; and variable coefficient were 93.99%, 86.25%, 89.52% and 82.83%, respectively, all of which were moderately strong variants. The test showed that the deficiency ratio of Zn was 63.57%, and the application of zinc fertilizer must be strengthened. The contents of available Cu, available Zn and available Fe were positively significant correlated with organic matter in cultivated land soil, and the contents of available Cu, available Zn, available Fe, available Mn were negatively significant correlated with pH in cultivated land soil. The contents and the distribution characteristics of available Cu, available Zn, available Fe, available Mn in different farming methods, soil types, and soil parent material development soil of Lichuan city were preliminary understand.

Key words: cultivated land, available Cu, available Zn, available Fe, available Mn, spatial distribution, Lichuan city