the contents of Ca, Cu, Mn, P, nitrate nitrogen at Chaohu water gate is apparently higher than those at the other spots, but the content or value of each soil element takes on no tendency related latitude.

• 土壤成分各观察点除居巢区巢湖闸点的钙、铜、锰、磷、硝态氮等成分含量较高外,未见一定的地理变化趋势。