Alimentação de vacas F1 Holandês x Zebu com suplementos nitrogenados e monensina sódica: avaliação do consumo, parâmetros ruminais e produção de leite

Laguna, Juliana; Rodrigues, A. N.; Saturnino, H.M.; Ruas, José Reinaldo Mendes; Coelho, Sandra Gesteira; Reis, R.B.

doi:10.1590/s0102-09352013000300033

Cited by 3 publications

(1 citation statement)

References 10 publications

(4 reference statements)

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“…The molar proportions of acetate and propionate were 68.8% and 28.2%, respectively, which are within the normal ranges of 54 to 74% (acetate) and 16 to 27% (propionate) proposed by Silva and Leão (1979) and by Filho and Pina (2011). Although the present study was conducted in a closed and restricted system (in vitro) and despite the fact that the rumen is a dynamic environment, with passage of solids and liquids and entry of saliva and feed, our results corroborate in vivo studies (Heldt et al 1999;Laguna et al 2013;Gonçalves et al 2015).…”

Section: Discussionsupporting

confidence: 81%

Substitution of Non-Protein Nitrogen for True Protein Increases Microbial Growth and Degradation of Fibrous Carbohydrates from Buffel Grass

Neto¹

2021

IJAB

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The aim of this study was to evaluate the effects of different sources of nitrogenous compounds on the in vitro utilisation of neutral detergent fibre from buffel grass in advanced phenological stage, the experiment consisted of testing five levels of substitution of urea for casein: 0, 25, 50, 75 and 100%. The effects of the substitution levels were evaluated by in vitro incubation at different times: 0, 3, 6, 9, 12, 24, 36, 48, 72 and 96 h. The degradation rate of potentially degradable NDF increased up to the replacement level of 50%, but declined by 6.53 and 13.57% in the treatments with 75 and 100% substitution of urea for casein, respectively, as compared with the treatment without substitution. Discrete lag time was reduced by 1.31 h in the treatment with 50% substitution and by 2.7 h at 100% substitution, as compared with 0% substitution. The substitution of up to 50% non-protein nitrogen for true protein increased microbial growth efficiency by 16.1% as compared with the treatment without substitution. Acetate and propionate concentrations were not affected by the substitution of urea for casein. The use of 50% non-protein nitrogen and 50% true protein as nitrogen sources for rumen microorganisms favour microbial growth and optimise the degradation of neutral detergent fibre from low-protein buffel grass. © 2021 Friends Science Publishers

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Section: Discussionsupporting

confidence: 81%

Substitution of Non-Protein Nitrogen for True Protein Increases Microbial Growth and Degradation of Fibrous Carbohydrates from Buffel Grass

Neto¹

2021

IJAB

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Effects of monensin in supplements for beef cattle in tropical grazing systems during the rainy season

Coutinho,

Monteiro,

Cabral

et al. 2023

Trop Anim Health Prod

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Performance of confined and grazing lambs fed diets with different mineral-concentrate supplements

et al. 2014

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For confined animals, performance is improved when their diet is supplemented with a mineral mixture and protein energy. This study evaluated the effect of dietary supplementation on feedlot sheep on native pasture. Two experiments were conducted in sequence, with the animals constrained in one and animals confined to pasture in the other. The experiments were conducted with 32 Santa Ines lambs, with average initial weights of 16.8 and 19.9 kg for the constrained and pasture studies, respectively. In both experiments, the animals were offered the following supplements: Supplement 1 = 200 g of the concentrate without mineral mixture; Supplement 2 = 200 g of the concentrate with mineral mixture + Mn + Zn; Supplement 3 = 300 g of the concentrate with mineral mixture + Mn + Zn; and Supplement 4: 300 g of the concentrate with mineral mixture + Zn without Mn. The intake of the mineral mixture resulted in a higher average intake of crude protein in feedlot lambs and neutral detergent fiber in pasture lambs than the other diets, regardless of the presence of manganese and thus provided more consistent weight gain among the animals. The mineral mixture supplementation increased the average daily intake of Zn and Mn. The animals on the diets containing 300 g day -1 supplementation with the concentrated mineral mixture also had more weight gain and better feed conversion than those on the other diets, most likely because of the greater responsiveness to supplementation in these animals.

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Alimentação de vacas F1 Holandês x Zebu com suplementos nitrogenados e monensina sódica: avaliação do consumo, parâmetros ruminais e produção de leite

Cited by 3 publications

References 10 publications

Substitution of Non-Protein Nitrogen for True Protein Increases Microbial Growth and Degradation of Fibrous Carbohydrates from Buffel Grass

Substitution of Non-Protein Nitrogen for True Protein Increases Microbial Growth and Degradation of Fibrous Carbohydrates from Buffel Grass

Effects of monensin in supplements for beef cattle in tropical grazing systems during the rainy season

Performance of confined and grazing lambs fed diets with different mineral-concentrate supplements

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