14 documents found, page 1 of 2

Alta CRIA 2019

Performance, growth, and maturity of Nellore bulls

The objectives of this study were to evaluate the dry matter intake (DMI), digestibility, average daily gain (ADG), microbial efficiency, empty body weight (EBW) gain, and body composition of Nellore bulls. Additionally, Nellore bull maturity was estimated, and the prediction equation for DMI, suggested by the Brazilian nutrient requirements system (BR CORTE; Azevêdo et al. 2010), was evaluated. Thirty-three Ne...

Nellore cows and their calves during the lactation period: performance, intake,...

An experiment was conducted to evaluate intake and nutrient digestibility, performance, milk composition, and microbial efficiency of Nellore cows and their calves during lactation. Fifteen Nellore cows were fed corn silage and concentrate (85:15). After calving, calves were kept with their dams for 2 months then separated and housed in individual pens adjacent to their dams. Cows were milked every 15 days over...

Energy and protein nutritional requirements for Nellore bulls

The objective of this study was to determine the nutritional requirements of energy and protein and estimate the efficiencies of metabolizable energy utilization for fat and protein deposition, as well as for maintenance (km) and growth (kg). An experiment of comparative slaughter was carried out with thirty-seven 14-month-old (±1 month) Nellore bulls with 259±24.9 kg. Animals were divided as follows: five to r...

Creatinine excretion and relationship with body weight of Nellore cattle

The objective of this study was to estimate the urinary creatinine excretion by the shrunk body weight (SBW). In experiment I, 32 Nellore bulls with initial body weight of 259±24.9 kg and 14±1 months-old were used. The group was divided in four animals to maintenance and twenty eight animals feeding ad libitum and separated in four groups; each group was slaughtered at different times of feedlot (42, 84, 126 an...

Macrominerals and trace element requirements for beef cattle

Eighty-seven Nellore animals were utilized in this study to estimate net requirements for the maintenance and growth of beef cattle as well as the retention coefficients of 13 minerals: macrominerals (Ca, P, Mg, K, Na, and S) and trace elements (Cu, Fe, Mn, Se, Zn, Co, and Cr). The net requirements for maintenance and the true retention coefficient were estimated by using the regression between apparent retenti...

Desempenho produtivo, exigências nutricionais e avaliação de métodos para estim...

Conselho Nacional de Desenvolvimento Científico e Tecnológico; This work was developed from four experiments to evaluate the dry matter and nutrients intake, digestibility, animal performance, carcass characteristics, energy and protein requeriments, chemical composition and fatty acid profile of Longissimus dorsi muscle; and to evaluate the ruminal outflow of dry matter and components of digesta sampling in th...

Comparison of purine bases and 15N to quantify microbial nitrogen yield in beef...

Conselho Nacional de Desenvolvimento Científico e Tecnológico; A produção de proteína microbiana (PM) é de grande importância para o metabolismo proteico em animais ruminantes. Assim, um experimento foi conduzido para avaliar o uso de marcadores microbianos (MM), locais de coleta (LC) e sistemas de marcadores (SM) para estimar a PM em bovinos não castrados e desenvolver equações para corrigir as estimativas de ...

Levels of replacing corn by cassava starch on performance and carcass character...

Made available in DSpace on 2013-09-27T14:52:47Z (GMT). No. of bitstreams: 1 WOS000281303300023.pdf: 691164 bytes, checksum: 57755c2edc16816b9abdc681bf17e517 (MD5) Previous issue date: 2010-01-01; Made available in DSpace on 2013-09-30T19:24:20Z (GMT). No. of bitstreams: 1 WOS000281303300023.pdf: 691164 bytes, checksum: 57755c2edc16816b9abdc681bf17e517 (MD5) Previous issue date: 2010-01-01; Submitted by Vitor S...

Óleo de soja e grãos de linhaça sobre o desempenho e características de carcaça...

Este experimento foi realizado para estudar o óleo de soja e grãos de linhaça como alimentos alternativos na alimentação animal para melhorar o desempenho e as características de carcaça de animais inteiros cruzados e terminados em confinamento por 105 dias. Foram utilizados 21 animais inteiros com 18 meses de idade distribuídos em três tratamentos (n=7): controle (CON), onde foi oferecido concentrado a base de...