日本群马县污泥肥料1982年达1.38万吨(以脱水物计,其粪便污泥含水量为70%,下水道污泥为75%)。证明它对许多作物效果肯定;但如施用不当,效果不良,特别是它含有重金属盐,易引起土壤积累。县农政部1982年制订“特殊肥料利用介绍”,作为技术指南,内容摘要如下。污泥的理想性状和品质:重金属含量低,有效成份含量高,难分解物少,有害生物低, In Gunma Prefecture, Japan, sludge fertilizers reached 13,800 tons in 1982 (on a dehydrated basis, the stool sludge had a water content of 70% and sewer sludge of 75%). It has been shown to be effective in many crops; however, if not properly applied, the effect is poor, especially when it contains heavy metal salts, which can easily lead to soil accumulation. County Department of Agriculture in 1982 to develop “special fertilizer utilization introduction”, as a technical guide, the content is summarized as follows. Sludge ideal traits and quality: low levels of heavy metals, high levels of active ingredients, less hard to decompose, low pests,