Holstein Cows
Mostrando 1-12 de 214 artigos, teses e dissertações.
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1. Relationship between main reproductive parameters and productivity traits in dairy cows
RESUMO O objetivo deste estudo era determinar a relação entre características produtivas e reprodutivas de vacas leiteiras lituanas. O estudo foi realizado com 586 vacas em lactação totalmente completas: 184 vacas Holstein (H) lituanas, 320 vacas Preto e Branco (LBW) lituanas e 82 vacas Vermelhas (LR) lituanas (291 vacas da raça I, 149 da raça II e 14
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2022
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2. Comportamento de vacas da raça Holandesa em ordenha robotizada (Behaviour of Holstein cows in robotic milking)
RESUMO O objetivo do trabalho foi avaliar o comportamento ingestivo de concentrado e de ordenha de vacas em lactação em sistema de ordenha robotizada (SOR) conforme a paridade. O experimento foi realizado de março a junho de 2014, em Castro, PR, com vacas da raça Holandesa, confinadas em free stall, ordenhadas automaticamente e classificadas de acordo co
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2020-01
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3. Association between gestation length and lactation performance, lactation curve, calf birth weight and dystocia in Holstein dairy cows in Iran
Abstract In this study, 252,798 lactations on 108,077 cows in 433 herds were used to determine the association between gestation length (GL) and lactation performance, lactation curve, calf birth weight and dystocia in Holstein dairy cows in Iran. The GL averaged 278.1 ± 5.41 d, was categorized as short (SGL; at 1 SD below the population mean), average (AGL
Anim. Reprod.. Publicado em: 25/11/2019
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4. Effects of physiological stage and season on infrared thermograms of different body areas of dairy cows raised under tropical conditions
Abstract The objective of this study was to investigate the influence of season and pregnancy stage on the temperature of various body areas of Holstein cows using digital infrared thermography, an effective and non-invasive technique. The temperature was recorded at several areas of the body surface to determine the most reliable body area for measurement o
Anim. Reprod.. Publicado em: 25/11/2019
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5. In vitro evaluation of novel crude extracts produced by actinobacteria for modulation of ruminal fermentation
ABSTRACT We evaluated the inclusion of two crude extracts produced by Streptomyces genus on in vitro dry matter and organic matter digestibility (IVDMD; IVOMD), cumulative gas production, volatile fatty acids (VFA), and methane (CH4) and ammoniacal nitrogen (NH3-N) concentration. The experimental design was randomized blocks with three blocks and four treatm
R. Bras. Zootec.. Publicado em: 11/11/2019
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6. Hypomagnesemia in dairy cattle in Uruguay
RESUMO: Descreve-se um surto de hipomagnesemia em bovinos leiteiros da raça Holandês com alimentação a base de pastagens de aveia (Avena sativa) em crescimento no Uruguai, nos meses de maio a julho (outono-inverno) de 2017. De um rebanho de 270 vacas em ordenha, nove (3,3%) morreram. As nove vacas tinham entre dois e nove anos, estavam entre a primeira e
Pesq. Vet. Bras.. Publicado em: 14/10/2019
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7. Carrier frequency of autosomal recessive disorders (BC, BLAD, FXID and CVM) in Holstein cows in Jalisco, Mexico
ABSTRACT: The hereditary autosomal recessive disorders bovine citrullinemia (BC), bovine leukocyte adhesion deficiency (BLAD), factor XI deficiency (FXID), and complex vertebral malformation (CVM) have affected dairy cattle breeding significantly around the world. This study examined the carrier frequency of BC, BLAD, FXID, and CVM autosomal recessive disord
Pesq. Vet. Bras.. Publicado em: 30/09/2019
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8. Inbreeding depression in Holstein cattle in Brazil
ABSTRACT The objective of this study was to evaluate inbreeding depression in Holstein cows in Brazil, considering their 305-day milk production (MP), age of first calving (AFC), and calving interval (CI). The effects of inbreeding depression on the traits were determined using four regression models (linear, quadratic, exponential, and Michaelis-Menten) abo
R. Bras. Zootec.. Publicado em: 12/09/2019
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9. Variation in available shaded area changes behaviour parameters in grazing dairy cows during the warm season
ABSTRACT The objective was to investigate the effects of available shaded area on behavioural characteristics of lactating cows during the warm season in the subtropics. Twelve Holstein cows were divided into groups, with 2 (SH2) or 10 m2 (SH10) of available shade per cow (six cows per treatment). The behaviour was recorded when animals were grazing from 09.
R. Bras. Zootec.. Publicado em: 12/09/2019
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10. Milk production and ingestive behavior of cows grazing on Marandu and Mulato II pastures under rotational stocking
ABSTRACT The objective of this study was to evaluate milk production and ingestive behavior of Holstein cows and the structural characteristics of Mulato II, a hybrid Brachiaria grass CIAT 36087 (B. ruziziensis × B. decumbens × B. brizantha), and Marandu (Brachiaria brizantha cv. Marandu) pastures under rotational stocking. The experiment was conducted fro
R. Bras. Zootec.. Publicado em: 22/08/2019
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11. Two enteral solutions with different chloride concentrations administered by naso-ruminal route for fluid therapy in adult cattle
RESUMO: Seis vacas holandesas adultas foram utilizadas neste estudo de hidratação. Todos os animais foram submetidos previamente a 24 horas de jejum hídrico e alimentar e submetidos a ambos os tratamentos de hidratação por oito horas, em delineamento transversal 6x2. Foram realizados dois tratamentos com soluções hipotônicas balanceadas (190 mOsm/L)
Cienc. Rural. Publicado em: 22/08/2019
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12. Experimental reproduction of congenital anomalies in the progeny of cows fed apple pomace during pregnancy
RESUMO: O presente trabalho tem por finalidade descrever e discutir os resultados do experimento realizado em vacas prenhes que foram alimentadas com 25kg/dia de bagaço de maçã. Experimentos foram conduzidos em duas etapas, a primeira no ano de 2015, de setembro a dezembro onde foram utilizadas 16 vacas prenhes da raça holandês. Estas foram divididas em
Pesq. Vet. Bras.. Publicado em: 18/07/2019