江西农业大学学报Issue(6)：1387-1392,1408,7.DOI:10.13836/j.jjau.2014221
鄱阳湖生态经济区沼肥养分及重金属状况研究
Contents of Nutrients and Heavy Metals in Biogas Tank Slurry and Dregs from Poyang Lake Eco-economic Zone
摘要
Abstract
In this study,the basic characters,contents of nutrients and heavy metals in biogas tank slurry and dregs collected from four typical counties (city) in Poyang Lake Eco-economic Zone were analyzed.The results showed that,the pH of the slurry and dregs was either neutral or light-alkalinity.The contents of organic matters and macro-nutrient elements in the slurry were significantly lower than those in the dregs,and the av⁃erage contents of organic matters and total N,total P and total K in slurry and dregs were 0.10%,0.58 g/kg, 0.11 g/kg,2.56 g/kg and 4.68%,4.62 g/kg,7.28 g/kg,6.16 g/kg respectively.The average contents of nutrients in slurry were found to be in an order K>N>P ,that in dregs were P>K>P . The average ratios of N ∶ P ∶ K in slurry and dregs were 1 ∶ 0.18 ∶ 4.45 and 1 ∶ 1.58 ∶ 1.33,and the proportion of P in slurry was lower in com⁃parison with the currently average consumptive proportion of N ∶ P ∶ K (1 ∶ 0.35~0.4 ∶ 0.3),but the propor⁃tion of K in slurry was significantly higher than the average consumptive proportion.Furthermore,the proportion of P and K in dregs was obviously higher than that of N.The average contents of heavy metals in slurry were in a range of Pb>Zn>Cd>Cu>As>Cr and in dregs Zn>Cu>Pb>Cr>Cd>As.Only the contents of Cd in slurry col⁃lected from Xinyu,Xingan and Wannian exceeded the limitations of mature compost in Germany slightly,and the contents of total Pd and total Cd in all slurry samples were consumedly higher than limitations of the irriga⁃tion water quality standards.In dregs,only the contents of Cd from 4 sampling points were 2.01-6.22 times higher than the limitation of organic-inorganic compound fertilizers. And Cu, Zn, Pb and Cd concentrations were higher than the standard of the limitations of mature compost in Germany,while Cr content was within the limitation.These results demonstrated that there are plenty of organic matters and macro-nutrient elements in the biogas tank slurry and dregs from Poyang Lake Eco-economic Zone. But the contents of heavy metals in slurry and dregs exceed limitation at different degrees,especially high security risk existed in agricultural appli⁃cation of dregs.关键词
鄱阳湖生态经济区/沼液/沼渣/养分/重金属Key words
Poyang Lake Eco-economic Zone/slurry/dregs/nutrients/heavy metal分类
农业科技引用本文复制引用
黎鑫林,熊忠华,刘勇,付永琦,刘德春,钟瑾..鄱阳湖生态经济区沼肥养分及重金属状况研究[J].江西农业大学学报,2014,(6):1387-1392,1408,7.基金项目
国家科技支撑计划项目（2012BAD14B14）和江西省科技计划项目 （）
