【摘要】 城市二级生活污水处理厂的脱水污泥是一种良好的有机肥料。连续五茬的田间小区试验表明,在等养分下,用污泥氮代替2/3化肥氮,其产量与施用全部化肥的产量相当;超量施用污泥,易引起作物生长失调,增产效率下降;连续施用污泥可对土壤有良好的培肥作用。更多还原

【Abstract】 The five field experiments with rice and wheat rotation show that the de- watered domestic sewage sludge from secondary treatment plant is a kind of good organic fer- tilizers.When two thirds of total fertilizar N was replaced by sludge—born N,the grain yield of this treatment was similar to that of the treatment by applying all chemical fertiliz- ers.Over—applying sludge resulted in growth unbalance of crops and lower efficiency of the crop production.Constant use of the sludge will improve the soil.更多还原