规模化养殖场猪配合饲料和粪便中重金属含量研究

对广西规模化养殖场10个猪配合饲料和12个猪粪样品进行Cu、Zn、Cr和Cd含量测定分析。结果表明,猪配合饲料与猪粪中的重金属含量差异较大,猪配合饲料中Cu、Zn、Cr和Cd的平均含量分别为153.4、194.9、5.6、0 mg/kg,猪粪中的Cu、Zn、Cr和Cd含量分别为760.7、1042.6、18.9和1.3 mg/kg。按照中国猪饲养标准和德国腐熟堆肥中重金属限量标准,猪配合饲料和猪粪中的Cu、Zn含量严重超标。猪粪与猪配合饲料中的Cu、Zn、Cr含量呈正相关或极显著正相关。因此,须严格控制猪配合饲料中重金属的含量,减少猪粪有机肥的重金属含量,降低土壤重金属污染,增加农产品质量安全。

Contents of heavy metals in formulated feed for pig and pig manure of scaled piggery

The contents of heavy metals Cu,Zn,Cr and Cd in 10 formulated pig feed samples and 12 pig manure samples collected from scaled piggeries in Guangxi were determined.The results showed that the difference of heavy metal contents between formulated feed and pig manure was big,the average content of Cu,Zn,Cr and Cd in formulated feed for pig was 153.4,194.9,5.6 and 0 mg/kg,respectively;and the content of these heavy metals in pig manures was 760.7, 1042.6,18.9 and 1.3 mg/kg,respectively.Moreover,according to the standards for pig feeding in China and the limitations of heavy metal contents in matured compost fertilizer in Germany,the content of Cu and Zn in the formulated feeds and the manures was extremely exceeded the limitations.The results also indicated that the content of Cu,Zn and Cr in pig manures was positively or significantly positively correlated to the formulated feeds for pig.Therefore,the contents of heavy metal in formulated feed of pig should be strictly controlled to decrease that content in pig manure and pollution of soil,strength the quality security of agricultural products.