摘要
通过水稻盆栽试验研究了3种改良剂(自制有机肥、泥炭、钢渣)2个用量(1 000.00 mg/kg和3 000.00mg/kg)对修复砷镉铅复合污染水稻土的效果,以常规施肥为对照。结果表明:①高用量有机肥和高用量泥炭处理水稻的经济产量显著(P<0.05)高于对照;仅高用量有机肥、高用量钢渣及低用量泥炭处理的土壤有效态砷含量显著(P<0.05)低于对照。②两种用量的钢渣、低用量有机肥和低用量泥炭处理后精米中砷镉铅含量均低于中国无公害大米标准。③相关分析表明土壤pH和有机质的提高分别是收获后水稻精米中Pb、Cd含量较低的原因之一。
Pot experiments were conducted to study the remediation of multi-metal（As,Cd,and Pb） contaminated paddy soil with amendments.Manmade organic fertilizer,peat and steel slag were chosen as amendments,with low and high application rates at 1 000.00 mg/kg and 3 000.00 mg/kg for each amendment,respectively.Control rice was only treated with conventional fertilizers.Results showed that economic yields of rice treated with manmade organic fertilizer and peat at 3 000.00 mg/kg significantly outweighed that just treated with conventional fertilizers（P0.05） at harvesting stage.The contents of available As in the soil treated with organic fertilizer and steel slag at 3 000.00 mg/kg and peat at 1 000.00 mg/kg were obviously lower than that of control.Manmade organic fertilizer and peat applied at 1 000.00 mg/kg and steel slag at above two usages reduced the accumulations of As,Cd and Pb in milled grains,getting all elemental contents less than that of the National Pollution-Free Rice Standard.Conventional fertilizing could also lower As and Pb in rice grains.Correlation analysis indicated that the increases of soil pH and organic matter caused the reduction of Pb and Cd in milled grains,respectively.
出处
《江苏农业学报》
CSCD
北大核心
2011年第6期1284-1288,共5页
Jiangsu Journal of Agricultural Sciences
基金
公益性行业专项(20100314-1-2)
江苏省农业科技自主创新基金项目[CX(09)625
CX(10)226]
国际合作项目(IPNI
JIANGSU-10)
关键词
砷
镉
铅
复合污染
水稻土
修复
arsenic
cadmium
lead
combined pollution
paddy soil
remediation
