Efeito do grupo racial e do número de lactações sobre a produtividade e a composição do leite bovino

Reis, Abel Mário dos; Costa, Marcela de Rezende; Costa, Renan Grecco; Suguimoto, Hélio Hiroshi; Souza, Cínthia Hoch Batista de; Aragón-Alegro, Lina Casale; Ludovico, Agostinho; Santana, Elsa Helena Walter de

doi:10.5433/1679-0359.2012v33supl2p3421

Cited by 6 publications

(9 citation statements)

References 14 publications

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“…Total milk solids were also not influenced by diets (Table 2). The variation in total solids content is highly dependent on variations in fat and protein content, since these components present the highest variation response to diet, mainly fat (Reis et al, 2012). In this sense, it was expected that this component would not be altered by the diets, in consonance with the fat and protein contents found in the present work.…”

Section: Resultssupporting

confidence: 71%

“…The level of production of the cows, their genetics and forage: concentrate ratio of the diet (70: 30), may help to explain the high fat content of milk. According to Reis et al (2012), the production is related to the dilution effect, while the genetics of crossbred dairy cows influence the production of milk with higher fat content. As for milk protein content, Dormond et al (1998) also evaluated the inclusion of banana peel in the diet for Jersey cows in initial and intermediate lactation, and reported average values of 3.48 and 3.52%, respectively.…”

Section: Resultsmentioning

confidence: 99%

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<b>Cheese and milk quality of F1 Holstein x Zebu cows fed different levels of banana peel

Melo

Júnior

Caldeira

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. This study aimed to evaluate the effects of the inclusion of different levels of sun-dried banana peel in the diet for crossbred cows on the quality of Minas fresh cheese and milk. Diets consisted of 0, 15, 30, 45 and 60% replacement of sorghum silage with banana peel. Ten cows were assigned to two 5 x 5 Latin squares experimental design. Milk samples were taken from each cow and analyzed for composition. Milk was pasteurized for the production of Minas fresh cheese, which was weighed to determine the yield and analyzed for texture, physical and chemical characteristics and consumer acceptance test. Milk urea nitrogen had a quadratic effect with minimum point at 43.76% replacement of silage with banana peel. The remaining items evaluated in the composition of milk and cheese and the consumer acceptance test were not influenced by diets with banana peel. The replacement of up to 60% sorghum silage with banana peel is a viable alternative because it causes no alteration in physical and chemical composition of milk and Minas fresh cheese, as well as consumer acceptance.Keywords: banana crop, milk processing, by-products.Qualidade do queijo e do leite de vacas F1 Holandês x Zebu alimentadas com níveis de casca de banana RESUMO. Objetivou-se avaliar os efeitos dos níveis de inclusão da casca de banana seca ao sol na dieta de vacas mestiças sobre a qualidade do queijo Minas frescal e do leite. As dietas foram constituídas de 0, 15, 30, 45 e 60% de substituição da silagem de sorgo pela casca de banana. Foram utilizadas 10 vacas em um delineamento experimental com dois quadrados latinos 5 x 5. Amostras de leite de cada vaca foram analisadas quanto à composição. O leite foi pasteurizado para fabricação do queijo Minas Frescal, que foi pesado para determinação do rendimento e analisado para textura, características físico-químicas e teste de aceitação geral pelo consumidor. O nitrogênio uréico do leite apresentou efeito quadrático com ponto de mínimo ao nível de 43,76% de substituição da silagem pela casca de banana. Os demais itens avaliados na composição do leite e do queijo, bem como os testes de aceitação geral pelo consumidor, não sofreram influência das dietas com inclusão de casca de banana. A substituição de até 60% da silagem de sorgo por casca de banana pode ser uma alternativa viável, pois não altera a composição físico-química do leite e do queijo Minas Frescal, bem como aceitação deste pelos consumidores.Palavras-chave: bananicultura, processamento do leite, subprodutos.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

<b>Cheese and milk quality of F1 Holstein x Zebu cows fed different levels of banana peel

Melo

Júnior

Caldeira

et al. 2017

Acta Sci. Anim. Sci.

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“…Reis et al (2012) evaluated Gyr, Holstein and Crossbred cows and found values lower than those of the present study, whose parameters are within standards required by NI/62 2011(Brazil, 2011, with average values of 395,000 SC/mL, 472,000 SC/mL and 423,000 SC/mL, respectively. SCC quantitatively indicates the degree of infection of the mammary gland.…”

Section: Resultsmentioning

confidence: 55%

“…The milk fat content differed (p<0.05) among genetic groups, and 15/16 Gyr cows showed less fat when compared to 3/4 and 7/8 Gyr cows, which fat contents were 3.25%±0.58, 3.74%±0.59 and 3.99%±1.09, respectively. Reis et al (2012) evaluated the effect of breed on milk yield and composition and concluded that Holstein cows were more productive, however, milk had lower concentrations of lipids and proteins than milk from Gyr cows and crossbred animals, and the average fat values were different when compared with the present study, 3.64, 3.49 and 3.68%, respectively, for Gyr, Holstein and crossbred cows.…”

Section: Resultsmentioning

confidence: 58%

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Influence of lactation stage, delivery order of calving and genetic group on milk quality

Carmo¹,

Silva²,

Pereira³

et al. 2015

Afr. J. Agric. Res.

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Milk production and quality are influenced by environmental factors such as nutrition, genetic factors such as breed and physiological. The aim of the present study was to evaluate the influence of lactation stage, delivery order and genetic group on the quality of milk from crossbred cows 3/4 Gyr, 7/8 Gyr and 15/16 Gyr. Fresh milk samples were collected from crossbred cows. Fat, protein, lactose, non fat dry extract (NDE) and somatic cell count (SCC) of milk according to lactation stage, delivery order of calving and genetic groups were evaluated. The experimental design was completely randomized. Tukey test at 5% probability was used. Animals at the final third of lactation (201 to 305 days) showed higher fat, protein, NDE and SCC levels when compared to animals of other lactation stages. First delivery animals produced milk with higher content of solids compared to animals with 2 deliveries and above three deliveries. First calving the animals produced milk with higher solids content compared to animals with two calving and above three calving. Fat, protein and NDE results of fresh milk were consistent with limits established by the Brazilian legislation for milk quality, regardless of lactation stage, delivery order of calving and genetic group. Milk SCC was higher in cows in advanced lactation stage, The results were however below limits required by law. 3/4 crossbred Gyr cows showed higher SCC, with average values above limit established by current legislation.

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Inclusion of calcium oxide in sugarcane silage under different particle sizes on performance of dairy cows

Andrade

Machado

David

et al. 2023

Trop Anim Health Prod

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The aim was to evaluate intake and apparent digestibility, productive performance and nitrogen balance of the F1 Holstein/Zebu dairy cows fed sugarcane silage with different particle sizes containing or not calcium oxide (CaO). Eight F1 Holstein/Zebu cows, with average body weight of 521.5 ± 55.17 kg, and 60 ± 10 days in milk were used, distributed in two simultaneous 4x4 Latin squares. The treatments were composed of sugarcane in two particle sizes (15 and 30 mm) with and without addition of CaO (10 g/kg natural matter basis), being the treatments compared according to a 2 x 2 factorial arrangement. Data were analyzed by analysis of variance using the MIXED procedure of SAS (version 9.4). The intakes of the dry matter (13.05 kg/d), crude protein, non-brous carbohydrates and neutral detergent ber were not modi ed (P > 0.05) by the inclusion of the calcium oxide, nor ot by particles size and interaction among both. However, there was interaction between CaO and particle size on dry matter digestibility (P = 0.002).The yield (13.85 kg/d) and composition of the milk were also not affected by diets (P > 0.05), similarly for nitrogen balance (P > 0,05). The addition of CaO to sugarcane silage with different particle sizes (15 and 30 mm) does not affect the yield and composition of the milk of Holstein/Zebu cows, nor the nitrogen balance. However, when CaO is added to sugarcane silage with reduced particle size, there is a loss in dry matter digestibility.

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Efeito do grupo racial e do número de lactações sobre a produtividade e a composição do leite bovino

Cited by 6 publications

References 14 publications

<b>Cheese and milk quality of F1 Holstein x Zebu cows fed different levels of banana peel

<b>Cheese and milk quality of F1 Holstein x Zebu cows fed different levels of banana peel

Influence of lactation stage, delivery order of calving and genetic group on milk quality

Inclusion of calcium oxide in sugarcane silage under different particle sizes on performance of dairy cows

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