Bionutritional efficiency of crossbred beef cattle finished on feedlot andslaughtered at different body weights

Mello, Renius; Queiróz, Augusto César de; Faria, Marcelo Henrique de; Henrique, Douglas Sampaio; Maldonado, Fabiana

doi:10.1590/s1516-35982010000300018

Cited by 4 publications

(7 citation statements)

References 17 publications

(22 reference statements)

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“…These negative numbers are incoherent biological values for FCR and FEI calculation, but BNI combines feed intake and weight gain into a new one-dimensional variable that encompasses their characteristics and prevents these problems (GUIDONI, 1994;DETMANN et al, 2005). This tool has been used to analyze the nutritional efficiency of high performance farm animals (EUCLIDES-FILHO et al, 2001;DETMANN et al, 2005;MELLO et al, 2010) and in this study we found that it is also valuable to assess the effects of parasitic infections on nutritional development, especially when there are no clinical signs.…”

Section: Discussionmentioning

confidence: 90%

Compromised nutrition in gerbils infected by Cystoisospora felis detected through an animal performance analysis tool

Frazão-Teixeira

Oliveira

Fiúza

et al. 2011

Rev. Bras. Parasitol. Vet.

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The impact of Cystoisospora felis infection on the nutritional efficiency of gerbils was studied. The variables weight gain and feed intake were measured during four weeks in 28 laboratory gerbils, of which 14 were inoculated with 3.5 × 10 5 sporulated oocysts of C. felis and the remaining 14 were controls. The animals from both groups were weighted, killed, eviscerated and had their carcasses and tissues weighted and compared. A modern tool designed for measuring nutritional performance of farm animals was applied. The results showed compromised nutritional efficiency of the infected animals within the first week after infection. The consequences of these results are discussed here, including the potential impact of infection on farm animals performance.Keywords: Cystoisospora felis, gerbil, bio-nutritional index, farm animal, oocyst, BNI. ResumoO impacto da infecção por Cystoisospora felis na eficiência nutricional de gerbis foi estudado. As variáveis ganho de peso e consumo de ração foram mensuradas durante quatro semanas em 28 gerbis de laboratório, dos quais 14 foram inoculados com 3,5 × 10 5 oocistos esporulados de C. felis e os 14 restantes serviram como controle. Os animais de ambos os grupos foram pesados, mortos, eviscerados e tiveram suas carcaças e tecidos pesados e comparados. Uma ferramenta moderna desenvolvida para mensurar o desempenho nutricional de animais de produção foi aplicada. Os resultados mostraram eficiência nutricional comprometida dos animais infectados na primeira semana após a infecção. As consequências destes resultados são discutidas aqui, incluindo o possível impacto de infecção no desempenho de animais de produção.Palavras-chave: Cystoisospora felis, gerbil, índice bionutricional, animal de produção, oocisto, IBN.

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Section: Discussionmentioning

confidence: 90%

Compromised nutrition in gerbils infected by Cystoisospora felis detected through an animal performance analysis tool

Frazão-Teixeira

Oliveira

Fiúza

et al. 2011

Rev. Bras. Parasitol. Vet.

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“…After that, the non-normalized eigenvectors associated with 1 (higher eigenvalue) were esti by solving the equations: GUIDONI, 1994;MELLO et al, 2010). The analy variance was performed using PROC GLM.…”

Section: Ingredientsmentioning

confidence: 99%

“…After that, the non-normalized eigenvectors associated with 1 (higher eigenvalue) were estimated by solving the equations: , where VC 1 is the first canonical variable, Y is animal transformation (ADG, kg day -1 ), X is the DMI (kg day -1 ), and and are defined above. The values of this function were denominated multivariate biological nutritional index -MBNI (GUIDONI, 1994;MELLO et al, 2010). The analysis of variance was performed using PROC GLM.…”

Section: Ingredientsmentioning

confidence: 99%

“…However, the higher FE in the univariate analysis does not guarantee a higher FE in the multivariate analysis, and this hypothesis may be rejected (MELLO et al, 2010). In this respect, the MBNI was used because it met the assumptions of the standard normal Gauss-Markov model, taking advantage of the collective information on variables and their discriminatory character (GUIDONI, 1994).…”

Section: Biological Efficiencymentioning

confidence: 99%

“…Achieving the highest bioeconomic efficiency is primarily associated with the conversion of ingested food into the production of animal protein. In this respect, some studies determined the biological efficiency of confined cattle using different parameters and different statistical analytical methods to identify the best discrimination between different groups (MELLO et al, 2010;NICHELE et al, 2015;PAZDIORA et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Eficiência bionutricional e características da carcaça de novilhos confinados recebendo distintas fontes nitrogenadas com milho moído ou inteiro

Klein¹,

Machado²,

Porsch³

et al. 2018

SCA

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The objective of this study is to evaluate the bionutritional efficiency and carcass characteristics of confined steers receiving different nitrogen sources associated or not with corn grain processing in the diet. The study used a completely randomized design with a 3?? 2 factorial arrangement. Fifty-three Charolais and Nellore crossbred steers were used, with a mean age of 22 ± 0.23 months and initial weight 250 ± 15.80 kg. The animals were randomly divided into the following treatments: soybean meal + whole corn, soybean meal + milled corn, conventional urea + whole corn, conventional urea + milled corn, slow-release urea + whole corn, and slow-release urea + milled corn. A roughage: concentrate ratio of 50: 50 was used. The steers were confined until reaching a weight of 420 kg. The slaughtering occurred according to the schedule of the commercial slaughterhouse. Feed efficiency was lower in animals receiving slow-release urea than those fed true protein. The steers fed soybean meal presented a higher Kleiber ratio and higher nutritional index compared to those receiving conventional or slow-release urea. The provision of soybean meal promoted higher production of rib meat and meat with a higher L* compared to those receiving urea, and better carcass finish compared to those receiving slow-release urea. Diets with milled corn increased warm and cold carcass yields and decreased weight loss during carcass chilling. Total replacement of soybean meal with conventional or slow-release urea reduced the biological efficiency of steers. The supply of milled corn in the concentrated fraction increased carcass yield.

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Effect of days in feedlot on growth performance, carcass and meat quality attributes of Tanzania shorthorn zebu steers

Asimwe

Kimambo

Laswai

et al. 2015

Trop Anim Health Prod

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A study was conducted on 50 steers (183 ± 4 kg initial body weight, 3 years of age) to assess effects of days in feedlot on performance, carcass characteristics and meat quality of Tanzania shorthorn zebu (TSZ) cattle with the aim of determining appropriate finishing period. Periods were 0 day (P0), 25 days (P25), 50 days (P50), 75 days (P75) and 100 days (P100) with 10 animals per period. Steers were housed in individual pens, fed with a concentrate diet and hay on an ad libitum basis except the P0 group which was slaughtered at the beginning of trial. Long stay in feedlot, P100, increased concentrate dry matter intake by 2 kg DM/day over short stay, P25. Final weight and total gain increased (P < 0.05) from P25 (22.6 kg) to P100 steers (95.4 kg). Periods had no influence (P > 0.05) on an average daily gain (ADG) and feed conversion ratio (FCR) but affected carcass characteristics. Empty body weight (EBW) and hot carcass weight (HCW) increased by 61 and 65 %, respectively, from no feedlot, P0 to P100. Dressing percentage was high (P < 0.05) for P100 steers. Carcass measurements, internal fat, fat thickness and carcass total fat were the highest (P < 0.05) on P100 steers and the lowest on P0 steers. Rate of pH decline increased with days in feedlot, while cooking loss and shear force values decreased in advanced ageing time. Feedlot periods of 75 and 100 days resulted into high intake, carcass measurements and tenderness, but 100 days further increased carcass fatness and fat thickness levels, thus, with this particular feeding system and animal's condition, 75 days is the recommended period to finish TSZ cattle in feedlots.

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Bionutritional efficiency of crossbred beef cattle finished on feedlot andslaughtered at different body weights

Cited by 4 publications

References 17 publications

Compromised nutrition in gerbils infected by Cystoisospora felis detected through an animal performance analysis tool

Compromised nutrition in gerbils infected by Cystoisospora felis detected through an animal performance analysis tool

Eficiência bionutricional e características da carcaça de novilhos confinados recebendo distintas fontes nitrogenadas com milho moído ou inteiro

Effect of days in feedlot on growth performance, carcass and meat quality attributes of Tanzania shorthorn zebu steers

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