المؤلفون: L.A. Borges, J.R.M. Ruas, V.R. Rocha Júnior, C.C.S. Carvalho, F.P. Monção, V.M. Gomes, J.P.S. Rigueira, P.G.M. Pinheiro, E.C.J. Sales, L.D.A. Rufino, E.A. Silva, D.S. Queiroz, H.C. Ferreira

المصدر: Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Vol 72, Iss 4, Pp 1545-1554 (2020)

مصطلحات موضوعية: cholesterol, respiratory rate, glucose, NEFA, Animal culture, SF1-1100

الوصف: ABSTRACT This study aimed to evaluate the effects of different nutritional plans on the productive, physiological and metabolic parameters of F1 ½ Holstein x ½ Zebu cows in different stages of lactation. Sixty lactating cows were allotted to a completely randomized 5 x 3 factorial design with five feed allowances and three lactation periods. The dry matter intake, milk yield and heart rate were reduced by 5.69kg, 2.41kg and 10.36 beats/min (morning) and 10.25 beats/min (afternoon) for each 1% feed restriction, respectively. There was no difference in the concentration of glucose, total protein, albumin, cholesterol and non-esterified fatty acids for cows subjected to different feed allowances, with means of 95.25, 7.98, 2.95, 121.68 and 0.45mg/dL, respectively. Feed restriction of up to 2.50% BW is a cost reduction strategy that does not alter milk yield, regardless of the stage of lactation.

وصف الملف: electronic resource

العلاقة: http://www.scielo.br/pdf/abmvz/v72n4/0102-0935-abmvz-72-04-1545.pdfTest; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352020000401545&tlng=enTest; https://doaj.org/toc/1678-4162Test

الوصول الحر: https://doaj.org/article/edba22d1e31048fabb157aa337945265Test

المؤلفون: Heberth Christian Ferreira, Luana Alcântara Borges, Leidy Darmony de Almeida Rufino, José Reinaldo Mendes Ruas, Domingos Sávio Queiroz, V. R. Rocha Júnior, Flávio Pinto Monção, Edilane Aparecida da Silva, João Paulo Sampaio Rigueira, Eleuza Clarete Junqueira de Sales, Cinara da Cunha Siqueira Carvalho, Pâmella Gabriela Martins Pinheiro, Virgílio Mesquita Gomes

المصدر: Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Vol 72, Iss 4, Pp 1545-1554 (2020)
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Volume: 72, Issue: 4, Pages: 1545-1554, Published: 14 AUG 2020
Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.72 n.4 2020
Arquivo brasileiro de medicina veterinária e zootecnia
Universidade Federal de Minas Gerais (UFMG)
instacron:UFMG

مصطلحات موضوعية: frequência respiratória, 040301 veterinary sciences, respiratory rate, Biology, glicose, NEFA, SF1-1100, 0403 veterinary science, chemistry.chemical_compound, Milk yield, Animal science, Lactation, medicine, Dry matter, glucose, Morning, General Veterinary, Cholesterol, 0402 animal and dairy science, cholesterol, 04 agricultural and veterinary sciences, Factorial experiment, colesterol, Zebu, 040201 dairy & animal science, Animal culture, medicine.anatomical_structure, chemistry

الوصف: This study aimed to evaluate the effects of different nutritional plans on the productive, physiological and metabolic parameters of F1 ½ Holstein x ½ Zebu cows in different stages of lactation. Sixty lactating cows were allotted to a completely randomized 5 x 3 factorial design with five feed allowances and three lactation periods. The dry matter intake, milk yield and heart rate were reduced by 5.69kg, 2.41kg and 10.36 beats/min (morning) and 10.25 beats/min (afternoon) for each 1% feed restriction, respectively. There was no difference in the concentration of glucose, total protein, albumin, cholesterol and non-esterified fatty acids for cows subjected to different feed allowances, with means of 95.25, 7.98, 2.95, 121.68 and 0.45mg/dL, respectively. Feed restriction of up to 2.50% BW is a cost reduction strategy that does not alter milk yield, regardless of the stage of lactation. RESUMO Objetivou-se avaliar os efeitos de diferentes planos nutricionais sobre as características produtivas, fisiológicas e metabólicas de vacas F1 ½ Holandês x ½ Zebu. Foram utilizadas 60 vacas em lactação, seguindo-se o delineamento inteiramente ao acaso, em esquema fatorial 5 x 3, com cinco níveis de oferta de dieta e três períodos de lactação. À medida que se aumentou 1% na restrição da oferta da dieta, houve redução linear de 5,69kg no consumo de matéria seca pelos animais, 2,41kg na produção de leite, bem como de 10,36bat/min (manhã) e 10,25 bat/min (tarde) na frequência cardíaca dos animais. Não houve diferença para a concentração de glicose, proteínas totais, albumina, colesterol e NEFA com a restrição na oferta da dieta dos animais, sendo a média de 95,25, 7,98, 2,95, 121,68 e 0,45mg/dL, respectivamente. Recomenda-se a restrição de até 2,50% de peso corporal como estratégia de redução dos custos em todos os estágios em lactação, visando não alterar, economicamente, a produção de leite.

وصف الملف: text/html

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09520971efae05dc20499a169fae2b4fTest
http://www.scielo.br/pdf/abmvz/v72n4/0102-0935-abmvz-72-04-1545.pdfTest

المؤلفون: H. N. Costa, M. A. T. Artunduaga, B. G Campos, Ronaldo Braga Reis, Helton Mattana Saturnino, Angela Maria Quintão Lana, Sandra Gesteira Coelho, R. V. S Fortes

المصدر: Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Vol 63, Iss 3, Pp 616-623 (2011)
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Volume: 63, Issue: 3, Pages: 616-623, Published: JUN 2011
Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.63 n.3 2011
Arquivo brasileiro de medicina veterinária e zootecnia
Universidade Federal de Minas Gerais (UFMG)
instacron:UFMG

مصطلحات موضوعية: periparto, General Veterinary, dairy cow, glyconeogenic additive, Ice calving, Biology, Milk production, Animal science, NEFA, gordura, Milk fat, Fat supplementation, lcsh:Animal culture, peripartum, Energy source, fat supplementation, Dairy cattle, Postpartum period, aditivo gliconeogênico, lcsh:SF1-1100

الوصف: Avaliaram-se o efeito da adição de diferentes fontes energéticas na dieta de vacas primíparas leiteiras, durante o período de transição, sobre a produção e a composição do leite, as ocorrências clínicas no pós-parto e sua relação com as concentrações plasmáticas de ácidos graxos não esterificados (AGNE). Foram utilizadas 50 vacas primíparas da raça Holandesa no período de 28 dias antes da data prevista do parto até o 21º dia pós-parto. Os animais foram designados aos grupos: controle, Megalac- E®, soja tostada (ST) ou propileno glicol (PG). Avaliações clínicas foram realizadas todos os dias. Amostras de sangue foram coletadas no pré e pós parto, antes da primeira alimentação do dia, para avaliação de AGNE. Os grupos Megalac- E® e propileno glicol apresentaram maior volume de leite corrigido para 3,5% de gordura (LCG 3,5%) em relação ao grupo soja tostada (P=0,05). Nos grupos controle, Megalac- E® e soja tostada, os valores de AGNE aumentaram até o parto, seguidos de queda após o parto. Essa queda foi menos acentuada no grupo-controle, que apresentou equação de regressão quadrática, estando associado à maior incidência de afecções no pós-parto. O grupo Megalac-E® apresentou comportamento cúbico, o soja tostada hiperbólico, e o propileno glicol quadrático. The purpose of this trial was to evaluate the effect of different energy sources added to the diet over milk production and composition, disease incidence during postpartum period and its relationship to NEFA concentrations during the transition period. Fifty primiparous Holstein dairy cows were used from 28 days before the expected calving date until 21 days postpartum. Cows were randomly distributed in four groups, being: control, Megalac- E®, toasted soybean (TS) and propylene glycol (PG). Clinical evaluations were performed during all experimental days. Blood samples were collected in pre and postpartum periods, before the first feeding of sampling day in order to determine NEFA prolife. Megalac- E® and propylene glicol groups showed greater milk production corrected to 3.5% fat compared to group toasted soybean (P=0.05). In control groups, Megalac-E® and toasted soybean values of NEFA increased until delivery and then decreased. This decrease was less pronounced in the control group that showed a quadratic regression equation associated with higher incidence of postpartum disorders. The Megalac-E® group showed a cubic model, the toasted soybean hyperbolic and propylene glycol quadratic equations.

وصف الملف: text/html

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65bdec871817cfb9e4caf14ef18ef8caTest
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000300013&lng=en&tlng=enTest

المؤلفون: D. Wang, C. Xia, D. Yu, C. Zhao, C. Xu, L. Wu

المصدر: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.73 n.1 2021
Arquivo brasileiro de medicina veterinária e zootecnia
Universidade Federal de Minas Gerais (UFMG)
instacron:UFMG

مصطلحات موضوعية: 040301 veterinary sciences, Bilirubin, Ice calving, SF1-1100, 0403 veterinary science, chemistry.chemical_compound, Animal science, NEFA, Blood plasma, medicine, ROC analysis, Dairy cattle, reproductive and urinary physiology, subclinical ketosis, General Veterinary, business.industry, dairy cow, 0402 animal and dairy science, Albumin, 04 agricultural and veterinary sciences, medicine.disease, 040201 dairy & animal science, Animal culture, chemistry, Ketosis, business, TBIL

الوصف: Ketosis can seriously impair cow performance. This study detected changes in prepartum blood metabolic parameters for predicting postpartum ketosis occurrence in dairy cows. Body condition score (BCS) was assessed before and after delivery. Blood samples of 63 cows were collected from 10 days before calving to 10 days after calving to measure metabolic parameters including β-hydroxybutyric acid (BHBA), non-esterified fatty acid (NEFA), glucose (GLU), total bilirubin (TBIL), direct bilirubin (DBIL), indirect bilirubin (IBIL), total protein (TP), albumin (ALB), globulin (GLO), alanine aminotransferase (ALT), and aspartate aminotransferase (AST). There was a postpartum subclinical ketosis incidence of 42.25%. Compared with prepartum, plasma, levels of BHBA, AST, and NEFA significantly increased postpartum, and prepartum AST (R=0.57) and NEFA (R=0.45) showed a significant positive correlation with ketosis postpartum. Plasma GLU level significantly decreased postpartum and was significantly negatively correlated with ketosis (R=-0.21). Receiver operating characteristic curve analysis revealed prepartum BSC < 2.88, and prepartum plasma AST > 68.0 U/L, GLU < 3.97mmol/L, NEFA > 0.27mmol/L, and BHBA > 0.43mmol/L, indicating a high risk of subclinical ketosis postpartum. These levels can be used as risk indicators to predict the occurrence of subclinical ketosis in postpartum cows.

وصف الملف: text/html

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88f9b1dad05327b04e3f9417b0d07112Test
http://www.scielo.br/pdf/abmvz/v73n1/0102-0935-abmvz-73-01-11.pdfTest