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对湖北江汉平原农田生态系统 8种种植模式中Cu的输入、输出和平衡进行了分析 .结果表明 ,农田Cu的输出主要是作物收获 ,其输出量占总输出量的 85 .9%～ 95 .1% ,流失和淋溶输出很少 .农田Cu的输入主要是有机肥输入和降雨输入 ,其次是降尘、作物自然归还和灌溉 ,而种子种苗和无机肥输入占很少的比例 .农田Cu的平衡分析表明 ,按照当地施肥习惯 ,菜田和水田Cu盈余较多 ,而旱地 4种种植模式基本平衡 .
The input, output and balance of Cu in eight cropping patterns of farmland ecosystem in Jianghan Plain in Hubei Province were analyzed.The results showed that the output of crop Cu was mainly crop harvesting, and the output of Cu accounted for 85.9% ~ 95% of the total output. 1%, and few leaching and leaching outputs.The input of cropland Cu was mainly organic fertilizer input and rainfall input, followed by dustfall, crop return and irrigation, and the seed seedlings and inorganic fertilizer accounted for a very small proportion. The balance analysis shows that according to the local fertilization habits, there is more Cu surplus in vegetable fields and paddy fields, while the four planting modes in dry land are basically balanced.