Performance Of West African Dwarf Sheep Fed Diets Supplemented With Rare Earth Elements (Ree)

Adu, Olufemi Adesanya; Adeseye, S A; Adebiyi, O. A.; Olumide, M. D.; Igbasan, F. A.; Alokan, J. A.

doi:10.4314/joafss.v4i1.33764

Cited by 4 publications

(7 citation statements)

References 1 publication

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“…The occurrence of these diseases was not related to the experimental diet. This is in accordance with results from previously published studies with pigs, broilers, calves and sheep (Adu et al 2006;Miller 2006;Fo¨rster et al 2008;He et al 2009a), where no negative influence of REE on animal health could be observed. Furthermore, Glabasnia-Kreppold (2008) conducted a tolerance study adding up to 2500 mg REE-citrate per kg to the diet of piglets and did not find any adverse effects on animal health.…”

Section: Animal Healthsupporting

confidence: 95%

“…However, the supplementation of REE led to a significant decrease in LW gain by 7% and an increase in feed-to-gain ratio and ME-to-gain ratio by 10% over the whole experimental period. In a feeding study lasting 12 weeks, 100, 200, 300 mg of lanthanum oxide per kg feed were fed to 40 growing West African dwarf sheep (n ¼ 10 per group) with 9.0 kg LW (Adu et al 2006). A dose-dependent response in the form of improved LW gain (40 up to 88 g/d) and feed-to-gain ratio (5.13 up to 2.83 kg/kg) was observed, whereas the feed intake did not differ between the groups (Adu et al 2006).…”

Section: Performance and Nutrient Digestibilitymentioning

confidence: 99%

“…In a feeding study lasting 12 weeks, 100, 200, 300 mg of lanthanum oxide per kg feed were fed to 40 growing West African dwarf sheep (n ¼ 10 per group) with 9.0 kg LW (Adu et al 2006). A dose-dependent response in the form of improved LW gain (40 up to 88 g/d) and feed-to-gain ratio (5.13 up to 2.83 kg/kg) was observed, whereas the feed intake did not differ between the groups (Adu et al 2006). No explanation can be given for these differences between various authors in relation to feed intake.…”

Section: Performance and Nutrient Digestibilitymentioning

confidence: 99%

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Effect of graded levels of rare earth elements in diets of fattening bulls on growing and slaughtering performance, and on nutrient digestibility of wethers

Schwabe

Meyer

Flachowsky

et al. 2011

Archives of Animal Nutrition

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The aim of the present dose response study was to examine the long-term effects of increasing the amounts of rare earth elements (REE) in the diet on growth and slaughtering performance of fattening bulls. A total of 48 bulls of German Holstein with an average initial live weight (LW) of 119 + 13 kg were divided into four dietary treatment groups (n = 12): a control group and three REE-treated groups, which were fed a supplement of 100, 200 and 300 mg REE-citrate per kg dry matter (DM) containing mainly cerium (57.9%), lanthanum (34.0%) and praseodymium (6.5%). The feeding trial was divided into a growing period for 8 weeks and a fattening period for 39 weeks. The growing diet consisted of concentrate, grass silage and grass hay, while the fattening diet consisted of concentrate and maize silage. The animals were slaughtered at approximately 556 kg LW. The intake of grass hay and maize silage (0.55-0.31 kg/d and 6.09-5.44 kg/d, respectively) decreased linearly (p < 0.05) with increasing REE-citrate supplementation, while LW gain showed only a numerical decrease during the growing (2-4%) and the fattening period (4-5%). The feed-to-gain ratio and ME-to-gain ratio were not significantly affected by REE treatment during the whole feeding trial. The most striking effect of REE on carcass characteristics was a significantly higher dressing percentage in Group C (200 mg REE citrate kg/DM) compared to the other groups, while no effects were found on liver, kidneys, heart, thymus, pancreas, spleen and thyroid gland weights. The digestibility trials with wethers indicate that a supplementation of 300 mg REE-citrate per kg DM to a ration consisting of concentrate and straw does not enhance the digestibility of nutrients. These results suggest that, under the conditions of the present study, the supplementation of fattening bull diets with REE cannot be recommended.

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Section: Animal Healthsupporting

confidence: 95%

Section: Performance and Nutrient Digestibilitymentioning

confidence: 99%

Section: Performance and Nutrient Digestibilitymentioning

confidence: 99%

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Effect of graded levels of rare earth elements in diets of fattening bulls on growing and slaughtering performance, and on nutrient digestibility of wethers

Schwabe

Meyer

Flachowsky

et al. 2011

Archives of Animal Nutrition

View full text Add to dashboard Cite

show abstract

“…The results were in agreement with the results of Renner et al (2011), who supplemented up to 300 mg REE citrate mixture (REE percentages: 34.30% La, 58.09% Ce and 7.61% other REE)/kg DM, which did not influence serum concentration of plasma total protein and aspartate amino-transferase in fattening bulls, and with those of Adu et al (2006), who supplemented up to 300 mg La oxide/kg feed, which did not affect serum concentration of aspartate amino-transferase, cholesterol, plasma total protein and albumin in West African dwarf sheep. The results were in agreement with the results of Renner et al (2011), who supplemented up to 300 mg REE citrate mixture (REE percentages: 34.30% La, 58.09% Ce and 7.61% other REE)/kg DM, which did not influence serum concentration of plasma total protein and aspartate amino-transferase in fattening bulls, and with those of Adu et al (2006), who supplemented up to 300 mg La oxide/kg feed, which did not affect serum concentration of aspartate amino-transferase, cholesterol, plasma total protein and albumin in West African dwarf sheep.…”

Section: Plasma Parameterssupporting

confidence: 90%

Comparison of the effects of lanthanum, cerium and praseodymium on rumen fermentation, nutrient digestion and plasma biochemical parameters in beef cattle

Lin

Chen

Zhao

et al. 2015

Archives of Animal Nutrition

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The objectives of the trial were to compare the effects of supplementing rare earth elements (REE) lanthanum (La), cerium (Ce) and praseodymium (Pr) on rumen fermentation, nutrient digestion, methane (CH4) production, nitrogen (N) balance and plasma biochemical parameters in beef cattle. Four Simmental male cattle, aged 12 months, with initial average liveweight of 333 ± 9 kg and fitted with rumen cannulas, were fed with a basal ration composed of concentrate mixture and maize silage. Animals received a basal ration without adding REE (Control) or three treatments, i.e. supplementing LaCl3, CeCl3 or PrCl3 at 204 mg/kg DM to the basal ration, respectively, which were allocated in a 4 × 4 Latin square design. Each experimental period lasted 15 d, consisting of 12 d for pre-treatment and three subsequent days for sampling. Results showed that all tested levels of REE tended to increase neutral detergent fibre digestibility (p = 0.064) and tended to decrease rumen CH4 production (p = 0.056). Supplementing LaCl3 and CeCl3 decreased total N excretion and urinary N excretion, increased N retention (p < 0.05), tended to increase total urinary purine derivatives (PD) (p = 0.053) and microbial N flow (p = 0.095), whereas supplementing PrCl3 did not affect N retention, urinary PD and microbial N flow. No differences were found in the effects of nutrient digestibility, CH4 production and plasma biochemical parameters among LaCl3, CeCl3 and PrCl3. Further trials using graded levels of LaCl3, CeCl3 and PrCl3 in a wide range are needed to obtain more pronounced results for comparing effects of La, Ce and Pr on rumen fermentation and nutrient digestion in beef cattle.

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“…Toxicity of REE through oral route is very low as only very small amounts of REE are absorbed in the GIT [44]. When rats were given [55] • Significantly decreased the molar ratio of rumen acetate to propionate, total N excretion, urinary N excretion and CH 4 /kg DMI Lanthanum oxide at 100, 200, and 300 mg/kg in the diet of sheep • Significant improvement in daily weight gain and total weight gain Adu et al [56] • Non-significant effect on AST, ALT, cholesterol, urea, total protein, albumin, and globulin In-vitro addition of REE chloride mixture (LaCl 3 380 mg/ kg; CeCl 3 521 mg/kg, PrCl 3 30 mg/kg and chlorides of other REE 69 mg/kg) at 400 and 800 mg/kg…”

Section: Safety Aspects Of Rare Earth Elements Supplementation To Animentioning

confidence: 99%

Perspectives for rare earth elements as feed additive in livestock — A review

Tariq

Sharma

Sarkar

et al. 2020

Asian-Australas J Anim Sci

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There is a need for newer feed additives due to legal prohibition on inclusion of growth promoting antibiotics in livestock diets in several countries due to antimicrobial resistance. In this context, rare earth elements (REE) have gained attention among animal nutritionists as potential growth promoters. Currently, several studies have reported better weight gain, milk production, egg laying capacity and feed conversion efficiency among different breeds of farm animals following supplementation with REE, with however largely inconsistent results. Furthermore, REE supplementation has also shown to improve ruminal fibrolytic and proteolytic activities as well as flavor of meat with negligible residues in edible tissue, however the mechanism behind this action is still unclear. According to existing research, due to their poor absorption and similarity with calcium REE might exert their action locally on gut microbial populations within the gastrointestinal tract (GIT). Moreover, REE have also shown anti-inflammatory, anti-oxidative as well as immune stimulating effects. The present review aims to broaden the knowledge about use of REE as feed additives for livestock and sum up efficacy of REE supplementation on performance and health of animals by comparing the findings. Till date, researches with REE have shown properties that make them a promising, new and safe alternative feed additive but further exploration is recommended to optimize effects and clarify discrepancy of various results before practical proposals can be drafted.

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Performance Of West African Dwarf Sheep Fed Diets Supplemented With Rare Earth Elements (Ree)

Cited by 4 publications

References 1 publication

Effect of graded levels of rare earth elements in diets of fattening bulls on growing and slaughtering performance, and on nutrient digestibility of wethers

Effect of graded levels of rare earth elements in diets of fattening bulls on growing and slaughtering performance, and on nutrient digestibility of wethers

Comparison of the effects of lanthanum, cerium and praseodymium on rumen fermentation, nutrient digestion and plasma biochemical parameters in beef cattle

Perspectives for rare earth elements as feed additive in livestock — A review

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