Abstract：
:Animal feed has traditionally been supplemented with trace elements at dietary concentrations well above physiological needs. However, environmental concerns have led to calls for better adjustment of mineral supplementation to actual physiological needs and, in this context, consideration of breed-related differences in trace element requirements. The aim of this study was to analyze trace element concentrations in the main breeds used for intensive beef production in northern Spain (Holstein-Friesian [HF], Galician Blonde [GB], and GB × HF cross). Samples of blood, internal organs, and muscle were obtained at slaughter from 10 HF, GB, and GB × HF cross calves in the same feedlot. Overall, trace element concentrations in serum and internal organs were within adequate ranges and did not differ between those of breeds, suggesting that trace mineral supplementation was adequate in all groups. The only exception to this was copper, and hepatic copper concentrations were above adequate levels in all calves. This was particularly evident in the HF calves, and the maximum recommended level for human consumption was exceeded in 90% of these animals. Copper, iron, manganese, selenium, and zinc concentrations in muscle were significantly higher in the HF than those in the GB calves, with intermediate values for the crosses. These breed-related differences in trace element concentrations in the muscle may be related to lower muscle mass and/or higher hepatic activity in the HF (dairy) calves than in GB (beef) calves. As meat is an essential source of highly available trace elements in human diets, breed-related differences in trace element concentrations in meat deserve further investigation.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Pereira V,Carbajales P,López-Alonso M,Miranda Mdoi
10.1007/s12011-018-1276-3subject
Has Abstractpub_date
2018-11-01 00:00:00pages
135-142issue
1eissn
0163-4984issn
1559-0720pii
10.1007/s12011-018-1276-3journal_volume
186pub_type
杂志文章abstract：:The trace minerals zinc, copper, iron, and selenium are essential micronutrients, and because of their antioxidant activity, they are hypothesized to improve cardiovascular health. However, their associations with different risk levels for cardiovascular diseases are less clear. Data from the National Health and Nutri...
journal_title：Biological trace element research
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journal_title：Biological trace element research
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更新日期：2002-11-01 00:00:00
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journal_title：Biological trace element research
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journal_title：Biological trace element research
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