摘要
以东北三省一些奶牛养殖场作为调查对象,分别采集饮用水、饲料、牛奶及排泄物牛粪、牛尿等样品,检测其中的Pb含量,了解Pb污染状况及空间分布,以及Pb在奶产业链中的生物迁移。分析结果表明,奶牛饮用水、饲料、牛奶中的Pb含量均低于国家卫生标准的限值;重工业城市附近的样品中Pb含量较高,以其为中心向外Pb含量逐渐降低,且地域间存在显著性差异(p<0.05);通过所建立的多元回归模型发现,牛奶中Pb含量与饮用水和精饲料密切相关(R2=0.87),牛尿中Pb含量与饮用水和粗饲料密切相关(R2=0.83),牛粪中Pb含量与日粮的精饲料和粗饲料密切相关(R2=0.91)。
To investigate the pollution status and spatial distribution characteristics of lead in the production chain of dairy,the distribution profiles and biotransformation of lead were studied and presented.Some analysis samples of the drinking water, dairy feeds, fresh milk, urine and feces of dairy cows were collected from twenty-three dairy farms in the northeast China, and their lead contents were determined.The analysis results showed that the lead contents in the drinking water, dairy feeds and fresh milk were all lower than the limits of national standards.The lead contents were higher in these samples collected nearing larger industrial cities, and showed a decreased trend gradually from the city center outward.The lead contents in these samples were also significantly different among the different regions（p 〈0.05）.The multiple regression model revealed that the lead contents in fresh milk were correlated to that in the drinking water and feed concentrates （ R2 = 0.87） ,while that in the urine or the feces of dairy cows were correlated to that in the drinking water and forages（ R2 =0.83）or to that in the feed concentrates and forages（ R2 = 0.91 ）.
出处
《食品工业科技》
CAS
CSCD
北大核心
2011年第4期87-90,共4页
Science and Technology of Food Industry
基金
国家十一五奶业重大专项(2006BAD04A08)
关键词
铅
牛奶
分布
生物迁移
lead
milk
distribution
biotransformation
