Copper in organic proteinate or inorganic sulfate form is equally bioavailable for broiler chicks fed a conventional corn-soybean meal diet

文献类型： 外文期刊

第一作者： Liu, Songbai

作者： Liu, Songbai;Lu, Lin;Li, Sufen;Xie, Jingjing;Zhang, Liyang;Luo, Xugang;Li, Sufen;Wang, Runlian

作者机构：

关键词： Bioavailability;Broiler chicks;Cu proteinate

期刊名称：BIOLOGICAL TRACE ELEMENT RESEARCH （ 影响因子：3.738； 五年影响因子：3.44 ）

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收录情况： SCI

摘要： An experiment was conducted to investigate the bioavailability of organic copper (Cu) proteinate relative to inorganic Cu sulfate for broiler chicks fed a conventional corn-soybean meal basal diet. A total of 320 day-old Arbor Acres commercial male chicks were assigned to one of five treatments in a completely randomized design involving a 2 × 2 factorial arrangement with two levels of added Cu (125 or 250 mg Cu/kg) and two Cu sources (Cu proteinate and Cu sulfate) plus a control with no added Cu for an experimental phase of 42 days. Plasma and liver tissue samples were collected at both 21 and 42 days of age, and bile samples were also obtained at 42 days of age for Cu analyses. The Cu concentrations in liver and bile increased linearly (P < 0.001) on both days 21 and 42 as dietary Cu levels increased. No significant (P > 0.17) linear regression relationships were observed between plasma Cu concentrations on days 21 and 42 or log10 liver Cu concentration on day 21 and daily analyzed Cu intake. Therefore, based on the slope ratios from multiple linear regressions of log10 liver and bile Cu concentrations with daily analyzed Cu intake on day 42, when Cu sulfate was set as 100%, the estimated relative bioavailability values of Cu proteinate were 78.8% for log10 liver Cu concentration and 79.3% for log10 bile Cu concentration, respectively. There was no significant (P > 0.08) difference in bioavailability between Cu proteinate and Cu sulfate for broilers chicks in this experiment.

分类号： Q5

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