摘要
选用27头体重约30 kg的三元杂交(长白大白杜洛克)生长猪进行消化试验,在日粮中分别添加氨基酸铜(Cu-AA)、硫酸铜(CuSO4)、碱式氯化铜(TBCC)10、150、250 mg.kg-1,共9个处理。分析测定猪对铜的消化率及猪粪中铜的可利用性。试验结果表明,添加不同铜源对猪铜的消化率影响差异不显著(P>0.05),日粮中添加高水平铜时,猪对铜的消化率显著低于添加低水平铜(P<0.05)。从粪中各形态铜的有效性来看,铜源间差异显著。CuSO4铜源猪粪可利用态铜显著低于Cu-AA铜源和TBCC铜源,但TBCC铜源和Cu-AA铜源间差异不显著;从潜在可利用态铜来看,CuSO4铜源和Cu-AA铜源猪粪差异不显著,但均显著高于TBCC铜源猪粪;从不可利用态铜来看,TBCC铜源猪粪显著高于CuSO4铜源和Cu-AA铜源猪粪。饲料中添加高水平铜处理猪粪中各形态铜含量都显著高于添加低水平铜处理。
An experiment designed to have 9 Cu treatments[3 Cu levels,10,150 and 250 mg · kg^-1 and 3 Cu forms,Cu- AA （amino acid copper）, CuSO4 （copper sulfate） and TBCC （tribasic copper chloride） ] was carried out on effect of addition of Cu in basic dietary on Cu digestibility of 27 crossbred growing pigs （ Landrace× Largewhite × Duroc） about 30 kg in body weight and Cu availability in their dungs. Results show that the effect of Cu source on Cu digestibility of pigs did not vary much （ P 〉 0.05 ）, but the effect of Cu level did. It was more significantly when the Cu level was high （ P 〈 0.05 ）. Availability of Cu in the pig dung varied sharply with the Cu forms. It was higher when CuSO4 was added than when Cu- AA or TBCC was added （ P 〈 0.05 ）, but it was more or less the same for the latter two （ P 〉 0.05 ）. In terms of potential available Cu in pig dung, the two treatments of Cu-AA and CuSO4 were quite similar （P 〉 0.05 ） but higher than the treatment of TBCC （ P 〈 0.05 ）. Naturally, unavailable Cu in the pig dung from Treatments TBCC was significantly higher than those from Treatments Cu-AA and CuSO4 （ P 〈 0.05 ）. Regardless of forms of Cu added, the content of Cu in the pig dung from pigs fed with a higher level of copper in the dietary was higher than those fed with a lower level of copper in the dietary（P 〈0.05）.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2008年第2期66-70,共5页
Journal of Ecology and Rural Environment
基金
湖南省自然科学基金(04JJ6006)
湖南省教育厅基金(07C352)
关键词
铜
消化率
粪铜形态
猪
Cu
copper digestibility
speciation of copper in manure
pig
