作　　者： ; ; ; ; (顾伟芳）;

机构地区： 南京农业大学

出　　处： 《南京农业大学学报》 1996年第2期40-44,共5页

摘　　要： 未经消化的二级生活污水处理厂脱水污泥含氮4.12%,其中有机态氮占93%。土柱试验用差值法测算污泥氮去向为:回收率46%,残留率47%,亏缺率7%。连续5茬的田间小区试验中,2/3化肥氮用污泥氮替代,水稻和小麦可得到相同的籽粒产量和肥料回收率。 Undigested dewatered domestic sewage sludge from secondary treatment plant contained N 4.12%, of which organic form of N accounted for 93%. The percentage of uptake, residual and deficit of sludge-N calculated by difference method in the soil column experiment were 46%, 47%, and 7%, respectively, while those from urea were 59%, 3%, and 38%, respectively. In field experiments with rice and wheat rotation grain yields, N recovery was similar when two thirds of total fertilizer N was replaced by sludge born N.

关 键 词： 污泥 氮肥 肥效

领　　域： [农业科学] [农业科学]