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Registros recuperados: 9
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Artificial induction of lactation in cattle R. Bras. Zootec.
Freitas,Priscila Ribeiro Corradi; Coelho,Sandra Gesteira; Rabelo,Euler; Lana,Ângela Maria Quintão; Artunduaga,Maria Alexandra Torres; Saturnino,Helton Mattana.
Forty Holstein cows, with previous reproductive problems, empty, at second or more lactations, with an average milk production of 9,200 kg in the previous lactation and a dry period over than 50 days were distruibuted in two groups to evaluate two protocols of milking induction. It was given to group 1, on days one, eight and 21 recombinant bovine somatotropin-bSTr (500 mg); from day two to eight, estradiol cypionate (0.075 mg/kg BW) and medroxi progesterone acetate (0.25 mg/kg BW); from days nine to 15, estradiol cypionate (0.037 mg/kg BW); on day 19, prostaglandin F2α (0.530 mg) and from days 19 to 21, isoflupredone acetate (0.05 mg/kg BW). Group two was given, on days one, eight and 21, bSTr (500 mg), from days 2 to 15, estradiol benzoate (0.071 mg/kg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Estradiol benzoate; Estradiol cypionate; Milk production; Somatotropin.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000024
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Behavior of dairy heifers after increasing the amounts of milk replacer powder added to whole milk PAB
Rufino,Sâmara Raiany de Almeida; Azevedo,Rafael Alves de; Furini,Pamela Michéli; Campos,Mariana Magalhães; Machado,Fernanda Samarini; Pires,Maria de Fátima Avila; Lima,Juliana Aparecida Mello; Coelho,Sandra Gesteira.
Abstract: The objective of this work was to evaluate the effects of increasing the contents of total solids (TS) in whole milk, by adding increasing amounts of milk replacer powder, on the behavior of dairy heifers. Holstein-Gyr crossbred heifers (n = 60) were distributed in four treatments: 13.5, 16.1, 18.2, and 20.4% TS. From 5 to 55 days of age, heifers received 6 L per day of liquid feed, which was reduced by half from 56 to 59 days. Heifers were weaned at 60 days of age and monitored until 90 days, and their behavior was evaluated weekly. During gradual weaning and after weaning, heifer behavior was recorded 1 hour before and 1 hour after liquid feed was offered, and, during weaning, it was evaluated by the scan method. Heifers fed liquid feed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stress; Vocalization; Weaning.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104310
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Desempenho de bezerros alimentados com silagem de leite de transição PAB
Azevedo,Rafael Alves de; Araújo,Leonardo; Coelho,Sandra Gesteira; Faria Filho,Daniel Emygdio de; Duarte,Eduardo Robson; Geraseev,Luciana Castro.
O objetivo deste trabalho foi avaliar o desempenho de bezerros da raça Holandesa, aleitados com leite ou silagem de leite de transição diluída em água ou misturada ao leite, bem como realizar análise econômica das dietas. Foram utilizados 18 animais, com peso corporal inicial médio de 36,50±4,03 kg, alojados individualmente em baias. Os animais receberam quatro litros de dieta líquida por dia, durante 54 dias. Os dados de consumo, ganho de peso diário, medidas de crescimento e conversão alimentar foram analisados em parcelas subdivididas; e o peso corporal final, o ganho total e a ocorrência de diarreia foram analisados em delineamento inteiramente casualizado. A silagem de leite de transição não alterou o consumo de concentrado e o total de matéria seca,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovinos; Colostro; Concentrado; Desmame de bezerros; Silagem.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000500011
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Environmental and genetic effects on the lactation curves of four genetic groups of crossbred Holstein-Zebu cows R. Bras. Zootec.
Glória,Joana Ribeiro da; Bergmann,José Aurélio Garcia; Quirino,Célia Raquel; Ruas,José Reinaldo Mendes; Pereira,Jonas Carlos Campos; Reis,Ronaldo Braga; Coelho,Sandra Gesteira; Silva,Martinho de Almeida e.
The objective of this study was to evaluate the effects of genetic group and environmental factors, including farm of origin, season of calving and lactation number, on the individual lactation curves of 1,010 Holstein-Gyr, Guzerat-Holstein, Holstein-Nellore, and Holstein-Zebu F1 cows on the experimental farms of the Agricultural Research Company in Minas Gerais (Empresa de Pesquisa Agropecuária de Minas Gerais, EPAMIG). Least squares analysis and the incomplete gamma function were used to investigate differences in early milk yield, peak milk yield, time from onset to the lactation peak, persistency, total milk yield and lactation duration. The highest early yields were observed for Holstein-Gyr and Holstein-Zebu, and the lowest were observed for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovine; F1; Incomplete gamma function.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100002
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Metabolic and hormone profiles of Holstein x Gyr cows during pre- and postpartum PAB
Franzoni,Ana Paula Saldanha; Gloria,Joana Ribeiro da; Costa,Anna Luiza Belli de Souza Alves; Martins,Ronaldo Alves; Amaral,Thiago Fernandes; Azevedo,Rafael Alves de; Campos,Ernane Ferreira; Coelho,Sandra Gesteira.
Abstract: The objective of this work was to describe the effect of genetic composition on body condition score (BCS), on total lactation production, and on metabolic and hormone profiles of Holstein x Gyr cows under the same pre- and postpartum management conditions. The genetic groups ½ (n=8), – (n=10), and ≥⅞ (n=10) Holstein x Gyr (HG) were evaluated within the same farm, and all of them showed typical lactation curves. The time required to reach peak production did not differ between groups. The groups also did not differ as to time to reach the lowest BCS after calving or to recover BCS after calving, nor as to their BCS values in the week of first ovulation, number of weeks required for first ovulation, and service period. However, ½ HG cows had...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bos indicus; Bos taurus; GH; IGF-1; Lactation curve; Transition period.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000300371
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Performance of lactating dairy cows fed sunflower or corn silages and concentrate based on citrus pulp or ground corn R. Bras. Zootec.
Leite,Leonardo Andrade; Reis,Ronaldo Braga; Pimentel,Patrícia Guimarães; Saturnino,Helton Mattana; Coelho,Sandra Gesteira; Moreira,Guilherme Rocha.
ABSTRACT This study aimed to evaluate the effect of diets containing sunflower or corn silages and concentrate based on citrus pulp or ground corn on intake, apparent digestibility, feeding behavior, microbial protein production, and production, composition, and fatty acid profile of milk from dairy cows. Eight multiparous lactating Holstein cows (586±61 kg live weight; 25.0±4.0 kg daily milk yield at 80 to 120 days in milk) were randomly assigned to a double 4 × 4 Latin square design with a 2 × 2 factorial array. The experimental diets were: sunflower silage + citrus pulp-based concentrate; sunflower silage + ground corn-based concentrate; corn silage + citrus pulp-based concentrate; and corn silage + ground corn-based concentrate. The dry matter intake...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Fatty acids; Intake; Milk composition.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000100056
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Procedimentos de coleta de leite cru individual e sua relação com a composição físico-química e a contagem de células somáticas Ciência Rural
Reis,Guilherme Lanna; Alves,Andréa Amaral; Lana,Ângela Maria Quintão; Coelho,Sandra Gesteira; Souza,Marcelo Resende de; Cerqueira,Mônica Maria Oliveira Pinho; Penna,Cláudia Freire de Andrade Morais; Mendes,Egleu Diomedes Marinho.
A indústria leiteira, visando a aumentar o rendimento industrial de seus produtos e melhorar a qualidade desses para atender à demanda do mercado consumidor, tem sido cada vez mais exigente com seus fornecedores de matéria-prima. Supõe-se que o tipo de ordenha e metodologias de coleta influenciam a composição físico-química e a contagem de células somáticas de leite cru, tornando-se necessário verificar tais efeitos. Com o objetivo de comprovar essa hipótese, foram analisadas 180 amostras de leite de 30 vacas. Utilizou-se o arranjo fatorial 2x3, sendo duas formas de coleta (manual - 100mL iniciais da ordenha, e mecânica - amostra da ordenha completa) e três tipos de amostras (manhã, tarde e "pool"). Os valores de gordura e extrato seco total (EST) foram os...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ordenha; Amostragem de leite cru; Composição físico-química e contagem de células somáticas.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000400035
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Reduction of crude protein in diets fed to lactating Holstein-Gyr cows PAB
Guimarães,Clóvis Ribeiro; Azevedo,Rafael Alves de; Campos,Mariana Magalhães; Machado,Fernanda Samarini; Pedroso,Alexandre Mendonça; Carvalheira,Luciano de Rezende; Tomich,Thierry Ribeiro; Pereira,Luiz Gustavo Ribeiro; Coelho,Sandra Gesteira.
Abstract: The objective of this work was to evaluate the effect of reducing crude protein (CP) contents in diets with a constant metabolizable protein content on the intake, performance, nitrogen balance, and nutrient digestibility of lactating Holstein-Gyr cows. Animals (n = 24, 103±23 days in milk) were allocated to four treatments (n = 6 per group) with different CP contents: 127, 132, 139, and 156 g kg-1 dry matter (DM). DM intake was not affected by treatments. CP intake and digestibility increased linearly with higher CP contents. Milk yield (23.7±3 kg per day) and the percentages of milk protein (3.3±0.2%) and fat (3.8±0.5%) were not affected by CP reduction. Milk and blood urea nitrogen increased linearly with the increase of CP in the diet,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen; Protected soybean meal; Soypass; Urea.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700858
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Yield and composition of milk from dairy cows fed diets containing cashew nuts Rev. Ciênc. Agron.
Pimentel,Patrícia Guimarães; Reis,Ronaldo Braga; Neiva,José Neuman Miranda; Coelho,Sandra Gesteira; Pinto,Andréa Pereira.
ABSTRACT This work evaluated the production and composition of milk from dairy cows fed increasing levels of cashew nuts in the concentrate portion of the diet. Eight Holstein multiparous cows were used, between the third and fifth lactation, with an average milk yield of 28.0 ? 4.0 kg day-1, arranged in a double 4 x 4 Latin square experimental design. The assessed diets consisted of including different amounts of ground cashew nuts (CN): 0; 80; 160 and 240 g kg-1 of concentrate portion, which resulted in ether extract contents of 31.6; 46.0; 68.9 and 73.1 g kg-1 of dietary dry matter, respectively. Corn silage was used as the only roughage at a proportion of 50% and diets were formulated to be isoprotein. Diet was offered as a complete mixture. Average...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Byproduct; Conjugated linoleic acid; Lipids; Milk fat; Milk protein.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400700
Registros recuperados: 9
Primeira ... 1 ... Última
 

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