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Micromineral status and nutrient utilisation in Zebu cattle

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Abstract
Micromineral deficiencies in cattle are omnipresent, both in developing and industrialized regions. Little information is available on the effect of micromineral deficiencies on nutrient use and digestibility, in spite of many deficiency-related symptoms suggesting a relevant role, such as loss of appetite in Zn deficiency and scouring in Cu deficiency. The present study aimed to identify the importance of adequate micromineral provision on nutrient utilisation in zebu cattle in Ethiopia. Eight zebu steers (Bos indicus) were randomly divided into two groups. Four animals received micromineral supplementation (Zn, Mn, Cu chelated to glycine MAAC®, MAAC® Se Premix (Novus International, Inc.) and inorganic I and Co) for 4 weeks, the four remaining were controls. The basic diet, identical for all animals, consisted of mixed grasses. Mineral levels were determined in feed, plasma and faecal samples. Apparent nutrient digestibility (DM, ash, protein, fat, NDF, ADF, ADL, minerals) was measured by total collection (3 days), along with concentrations of ceruloplasmin (CP), superoxide dismutase (SOD) and acylcarnitines (ACAR) in plasma as indicators of fermentation and energy substrate use. Faecal nitrogen fractions (FNF) (bacterial, vegetal or animal) and body weight (BW) were also measured. Repeated measures analysis was performed on all data, with baseline data (sampled one week prior to supplementation) as covariate. Feed mineral analysis revealed deficient Cu (5.53-9.60 mg/kg) and Se (0.02-0.09 mg/kg) in combination with high S (0.26-0.39%) and Mo (1.52-3.12 mg/kg) and very high Fe (619-1214 mg/kg) concentrations. Micromineral supplementation increased plasma Cu (0.82 vs. 0.61 mg/l), Zn (1.40 vs. 0.89 mg/l), Mn (0.30 vs. 0.05 mg/l) and Se (0.07 vs. 0.06 mg/l) concentrations (all P<0.05). Faecal Cu, Zn, Mn and Se were also increased (P<0.05), as was faecal Co (P=0.06) concentration in supplemented cattle. Supplementation affected neither apparent nutrient (DM, ash, protein, fat, fibre, mineral) digestibility nor CP, SOD, ACAR, FNF or BW (P>0.05) in this pilot study. Despite clear improvement on micromineral status - notwithstanding high concentrations of Cu and Se antagonists in the diet – supplementation did not impact nutrient digestibility or utilisation in a clear way. Further research should confirm the absence of this relationship.
Keywords
cattle, microminerals, digestibility

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Chicago
Dermauw, Veronique, Yisehak Kechero, Ellen Dierenfeld, Gijs Du Laing, Johan Buyse, Brigitte Wuyts, and Geert Janssens. 2011. “Micromineral Status and Nutrient Utilisation in Zebu Cattle.” In 14th International Symposium on Trace Elements in Man and Animals, 266–266.
APA
Dermauw, V., Kechero, Y., Dierenfeld, E., Du Laing, G., Buyse, J., Wuyts, B., & Janssens, G. (2011). Micromineral status and nutrient utilisation in Zebu cattle. 14th International symposium on trace elements in man and animals (pp. 266–266). Presented at the 14th International symposium on Trace Elements in Man and Animals (TEMA 14): Exploring trace elements : science, innovation, and application.
Vancouver
1.
Dermauw V, Kechero Y, Dierenfeld E, Du Laing G, Buyse J, Wuyts B, et al. Micromineral status and nutrient utilisation in Zebu cattle. 14th International symposium on trace elements in man and animals. 2011. p. 266–266.
MLA
Dermauw, Veronique, Yisehak Kechero, Ellen Dierenfeld, et al. “Micromineral Status and Nutrient Utilisation in Zebu Cattle.” 14th International Symposium on Trace Elements in Man and Animals. 2011. 266–266. Print.
@inproceedings{1987751,
  abstract     = {Micromineral deficiencies in cattle are omnipresent, both in developing and industrialized regions. Little information is available on the effect of micromineral deficiencies on nutrient use and digestibility, in spite of many deficiency-related symptoms suggesting a relevant role, such as loss of appetite in Zn deficiency and scouring in Cu deficiency. The present study aimed to identify the importance of adequate micromineral provision on nutrient utilisation in zebu cattle in Ethiopia. Eight zebu steers (Bos indicus) were randomly divided into two groups. Four animals received micromineral supplementation (Zn, Mn, Cu chelated to glycine MAAC{\textregistered}, MAAC{\textregistered} Se Premix (Novus International, Inc.) and inorganic I and Co) for 4 weeks, the four remaining were controls. The basic diet, identical for all animals, consisted of mixed grasses. Mineral levels were determined in feed, plasma and faecal samples. Apparent nutrient digestibility (DM, ash, protein, fat, NDF, ADF, ADL, minerals) was measured by total collection (3 days), along with concentrations of ceruloplasmin (CP), superoxide dismutase (SOD) and acylcarnitines (ACAR) in plasma as indicators of fermentation and energy substrate use. Faecal nitrogen fractions (FNF) (bacterial, vegetal or animal) and body weight (BW) were also measured. Repeated measures analysis was performed on all data, with baseline data (sampled one week prior to supplementation) as covariate. Feed mineral analysis revealed deficient Cu (5.53-9.60 mg/kg) and Se (0.02-0.09 mg/kg) in combination with high S (0.26-0.39\%) and Mo (1.52-3.12 mg/kg) and very high Fe (619-1214 mg/kg) concentrations. Micromineral supplementation increased plasma Cu (0.82 vs. 0.61 mg/l), Zn (1.40 vs. 0.89 mg/l), Mn (0.30 vs. 0.05 mg/l) and Se (0.07 vs. 0.06 mg/l) concentrations (all P{\textlangle}0.05). Faecal Cu, Zn, Mn and Se were also increased (P{\textlangle}0.05), as was faecal Co (P=0.06) concentration in supplemented cattle. Supplementation affected neither apparent nutrient (DM, ash, protein, fat, fibre, mineral) digestibility nor CP, SOD, ACAR, FNF or BW (P{\textrangle}0.05) in this pilot study. Despite clear improvement on micromineral status - notwithstanding high concentrations of Cu and Se antagonists in the diet -- supplementation did not impact nutrient digestibility or utilisation in a clear way. Further research should confirm the absence of this relationship.},
  articleno    = {abstract PT33},
  author       = {Dermauw, Veronique and Kechero, Yisehak  and Dierenfeld, Ellen and Du Laing, Gijs and Buyse, Johan and Wuyts, Brigitte and Janssens, Geert},
  booktitle    = {14th International symposium on trace elements in man and animals},
  keyword      = {cattle,microminerals,digestibility},
  language     = {eng},
  location     = {Enshi, Hubei, PR China},
  pages        = {abstract PT33:266--abstract PT33:266},
  title        = {Micromineral status and nutrient utilisation in Zebu cattle},
  year         = {2011},
}