摘要
通过两年动态监测和田间试验，研究了苏州市生活污泥的基本性质，及不同用量污泥（０，５．５２，１０．３３．１４．０９ｔ／ｈｍ２·ａ－１，干重）对６茬蔬菜产量、卫生品质、土壤ｐＨ和盐基离子的影响．结果表明：生活污泥有机质及氮、磷含量丰富，有毒重金属含量低，但锌含量较高，未经消化的污泥含较多的病原物．施用污泥明显提高蔬菜产量，但也会提高后茬蔬菜体内锌含量．并会加剧耕层上镶钙、镁淋失．使上壤明显酸化．作者认为菜地大量施用污泥应要严格控制。
Two years'laboratory analysis and field experiment were conducted to determine the composition of undigested municipal sewage sludge and the effects of sewage sludge applied to agricultural land on hygienic aspects of six vegetables and soil physi-chemical properties. Sewage sludge was added to a loamy soil(DW)at rates of 0,5.52,10.33,and 14.09 t·hm-2.a-1.The results indicated that municipal sludge was a solid organic waste with higher contents of organic matter,nitrogen,phosphrous and lower potassium and heavy metals except zinc.Sewage sludge-derived N and P were readily taken up by vegetables.So vegetable yield could be increased following application of sewage. However,higher content of Zn in edible tissues of foliar vegetables grown in sludge-amended soil was also discovered.Sewage sludge had markedly effect in lowing soil pH and causing the leaching of Ca2+.Mg2+ from tillage layer.It is concluded that there is a hygienic constraints to the use of undigested sludge on vegetables due to the higher contents of zinc and pathogen.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1994年第2期54-59,共6页
Journal of Nanjing Agricultural University
关键词
污泥
蔬菜
土壤
苏州市
sewage sludge
composition
vegetables
heavy metal
soil acidity
