Composição corporal e requisitos energéticos de bovinos de corte sob suplementação em pastejo

Sales, M. F. L.; Paulino, Mário Fonseca; Filho, Sebastião de Campos Valadares; Paulino, Pedro Veiga Rodrigues; Porto, Marlos Oliveira; Couto, Victor Rezende Moreira

doi:10.1590/s1516-35982009000700027

Cited by 7 publications

(5 citation statements)

References 13 publications

(6 reference statements)

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“…The intake of NDFom(n) was not affected by supplementation (Table 4); however, because fiber of meals is more digestible (Sales et al, 2009), there was an increase of total apparent digestibility of this component ( Table 4 -Descriptive levels of probability of contrast among supplemented and no supplemented, regression parameters, initial body weight means, final body weight and daily average gain in for different supplements dry matter intake, as the greatest influence on this trait is exercised by pasture neutral detergent fiber. The apparent digestibility of crude protein was higher for animals that received supplementation.…”

Section: Resultsmentioning

confidence: 98%

“…However, if it is below the 10% reported by Sampaio et al (2009) Although the forage consumed by the animals had crude protein level higher than the minimum needed so there is appropriate use of the neutral detergent fiber (NDF) of the low quality basal forage, it was verified that 28.65% of this protein was lowly available for the animal, in other words, in insoluble neutral protein form (NDICP ; Table 3), which reinforces the importance of supplying nitrogen supplement sources more rapidly available. Because forage is the most economic and feasible way of feeding bovines, to increase the use of forage through optimization of intake and availability of its nutrients is primordial (Sales et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

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Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Barros¹,

Paulino²,

Filho³

et al. 2011

R. Bras. Zootec.

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-The objective of this work was to evaluate the effect of using multiple supplements with different levels of cottonseed meal 38% on intake, total apparent digestibility of dietary components, efficiency of microbial synthesis and productive performance of beef heifers in Brachiaria decumbens pasture during the rainy season. It was used 25 Nellore heifers and 10 crossbred heifers with predominance of Zebu breed at 16 months of age and with 249.8 ± 0.6 kg of body weight. It was used a complete random experimental design with five treatments and seven replicates. Supplements contained approximately 30% of crude protein (CP) and soybean meal replaced by cottonseed meal 38% at the levels 0; 33; 67 and 100%, (CS 0 , CS 33 , CS 67 and CS 100 , respectively) evaluated in relation to a control group, which received only mineral mixture (MM) ad libitum.Daily weight gain was 397, 546, 570, 525 and 542 g, respectively, for the groups MM, CS 0 , CS 33 , CS 67 and CS 100 . There was no effect of the levels of cottonseed meal 38% on daily weight gain, which differed among animals fed supplement and control group, however. Intakes of crude protein and non-fibrous carbohydrates (NFC) in kg/day were greater in groups under supplementation. Coefficients of total apparent digestibility of CP and NFC were greater in animals fed supplements in relation to the control group. Increase on the replacement level of soybean meal by cottonseed meal had a positive linear effect on coefficients of total apparent digestibility of DM, organic matter and CP. There was no difference on microbial efficiency, expressed as g of crude protein per kg of TDN consumed by the animals under supplements and the ones of the control group, neither it was observed difference among levels of replacement of soybean meal by cottonseed meal. The use of cottonseed meal 38% replacing soybean meal in the diet does not harm performance of grazing beef heifers.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Barros¹,

Paulino²,

Filho³

et al. 2011

R. Bras. Zootec.

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show abstract

“…Recentemente, trabalhos foram realizados buscando-se avaliar as necessidades nutricionais de zebuínos recriados e terminados a pasto (MORAES et al, 2009(MORAES et al, e 2010SALES et al, 2009 e 2010), condição de criação que predomina no Brasil.…”

Section: Desenvolvimentounclassified

“…Além disso, animais mantidos em confinamento e alimentados com dietas de alto concentrado apresentam maior k g comparados aqueles mantidos em pastagem (Tabela 2). A menor k g observada nos animais mantidos em pastagem pode estar relacionado ao maior incremento calórico resultante da digestão de dietas ricas em volumosos comparadas a dietas ricas em grãos, e à maior atividade física dos animais em pastejo comparados aos animais mantidos em confinamento (Sales et al, 2009). Apesar da grande variação observada para k g em animais mantidos em confinamento e pastagem, a eficiência de utilização de energia para mantença (k m ) é pouco variável.…”

Section: Atendimento Das Necessidades Energéticas De Bovinos Em Crescunclassified

Utilização de energia para crescimento e sua influência na composição corporal de bovinos de corte

Fernandes¹,

Rossi²,

Stieven³

et al. 2011

Pubvet

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“…Researchers have worked with equations to relate biometric measurements to body weight in cattle (Reis et al, 2008;Bretschneider et al, 2014;Franco et al, 2017). Heart girth is a measure highly correlated with weight and, therefore, to facilitate the weighing process, researchers Prediction of Girolando cattle weight by means of body measurements extracted from images Weber et al 2 have developed a measuring tape, which contains the reference scale to find out the body weight of the animal (Sales et al, 2009;Abreu et al, 2015). However, as this tape requires direct contact of a person with the animal, it may cause stress and slows down the body weight measuring process.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Girolando cattle weight by means of body measurements extracted from images

Weber¹,

Weber²,

Gomes³

et al. 2020

Revista Brasileira De Zootecnia

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The objective with this study was to analyze the body measurements of Girolando cattle, as well as measurements extracted from their images, to generate a model to understand which measures further explain the cattle body weight. Therefore, the experiment physically measured 34 Girolando cattle (two males and 32 females), for the following traits: heart girth (HG P ), circumference of the abdomen, body length, occipito-ischial length, wither height, and hip height. In addition, images of the dorsum and the body lateral area of these animals allowed measurements of hip width (HW I ), body length, tail distance to the neck, dorsum area (DA I ), dorsum perimeter, wither height, hip height, body lateral area, perimeter of the lateral area, and rib height. The measurements extracted from the images were subjected to the stepwise regression method and regression-based machine learning algorithms. The HG p was the physical measure with stronger positive correlation with respect to body weight. In the stepwise method, the final model generated R² of 0.70 and RMSE of 42.52 kg and the equation: WEIGHT (kg) = 6.15421 * HW I (cm) + 0.01929 * DA I (cm 2 ) + 70.8388. The linear regression and SVM algorithms obtained the best results, followed by discretization regression with random forests. The set of rules presented in this study can be recommended for estimating body weight in Girolando cattle, at a correlation coefficient of 0.71, by measurements of hip width and dorsum area, both extracted from cattle images.

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Composição corporal e requisitos energéticos de bovinos de corte sob suplementação em pastejo

Cited by 7 publications

References 13 publications

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Utilização de energia para crescimento e sua influência na composição corporal de bovinos de corte

Prediction of Girolando cattle weight by means of body measurements extracted from images

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