Qualidade e potencial nutracêutico do leite bovino em diferentes sistemas de produção e estações do ano

Vargas, Diego Prado de; Nörnberg, José Laerte; Scheibler, Rudolf Brand; Schafhäuser, J.; Rizzo, Fábio Antunes; Wagner, Róger

doi:10.1590/s0100-204x2015001200011

Cited by 7 publications

(8 citation statements)

References 20 publications

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“…With the exception of casein, all the constituents of milk had lower values in the dry season (seasons 3 and 4). Gonzalez et al (2004), Simioni et al (2014) and Vargas et al (2015) also found variation in bovine milk composition according to the months of the year, and pointed out low quantitative and qualitative supply of forage as the probable cause that occurs at some periods of the year. The reduction in levels of fat, protein and total solids, which are substantially influenced by nutritional management (ROSA et al, 2012), reaffirm this effect.…”

Section: Resultsmentioning

confidence: 97%

Quality indicators of tank milk in different production systems of tropical regions

Campos

Rangel

Borba

et al. 2016

SCA

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Research was conducted in eight commercial herds located in the state of Rio Grande do Norte, Brazil. Properties were classified according to the production system, the seasons were divided into four and the genetic groups into six. Milk samples from morning milking were collected monthly, directly from a cooling tank. Protein, fat, lactose, total solids, casein, urea nitrogen concentrations/levels, somatic cell count (SCC) and total bacterial count (TBC) were determined. For milk composition, the detected results were satisfactory and met the requirements of Normative Ruling 62, but the averages for SCC and TBC were above the recommended limit. All variables, with the exception of casein from total protein were influenced (P <0.05) by the production system used in the production unit. A lower fat content was recorded in 2010 compared to 2011. For the seasons, all the constituents of milk had lower values in drier season (seasons 3 and 4), with the exception of casein; SCC and TBC had higher values in periods 1 and 2, which are considered rainy periods. There was variation in the chemical composition of milk according to the genotypes. Milk chemical composition met the legal and market requirements, with a positive emphasis on specialized production systems. The variations over the year and according to the genetic group of the herd are also significant and should be taken into account in the search for improvements. As for the hygiene and health aspects of milk, the results portray the need for a greater focus by the entities involved in the sector, as well as the producers, on the viability of an adequacy program and monitoring of management practices related to this criterion. Campos, P. P. L. da E. et al.do tanque de resfriamento, amostras de leite na ordenha da manhã. Foram determinados os teores de proteína, gordura, lactose, sólidos totais, caseína, as concentrações de nitrogênio ureico, a contagem de células somáticas (CCS) e a contagem bacteriana total (CBT). Para a composição do leite, os resultados detectados foram satisfatórios e atenderam às exigências previstas na Instrução Normativa 62, mas as médias obtidas para CCS e CBT estão acima do limite recomendado. Todas as variáveis analisadas, com exceção da caseína da proteína total, foram influenciadas (P<0,05) pelo sistema de produção utilizado na unidade produtiva. Verificou-se menor teor de gordura em 2010, quando comparado a 2011. Para as estações do ano, com exceção da caseína, todos os constituintes do leite apresentaram menores valores na época mais seca (estações 3 e 4), já a CCS e CBT apresentaram maiores valores nas épocas 1 e 2, que são considerados períodos de chuva. Verificou-se variação na composição química do leite de acordo com os genótipos estudados. A composição química do leite atende às exigências legais e de mercado, com destaque positivo para os sistemas de produção especializados. As variações ao longo do ano e de acordo com o grupo genético do rebanho são também significantes, devendo ser levadas em consideração na bus...

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Section: Resultsmentioning

confidence: 97%

Quality indicators of tank milk in different production systems of tropical regions

Campos

Rangel

Borba

et al. 2016

SCA

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“…Nesse sentido, os maiores valores de CCS encontrados no verão podem ser resultantes das altas temperaturas dessa estação na região Sul do Brasil, o que poderia resultar em estresse térmico e limitação da resposta imunológica dos animais a doenças e sua susceptibilidade à invasão do úbere por microrganismos, resultando em aumento na CCS do leite (5) .…”

Section: Discussionunclassified

“…Sistemas de produção e estações do ano interferem na qualidade físico-química e microbiológica do leite (5) , porém existem poucas informações referentes ao efeito conjunto desses fatores na qualidade dessa matéria-prima.…”

Section: Introductionunclassified

Qualidade Físico-Química E Microbiológica Do Leite Bovino Em Diferentes Sistemas De Produção E Estações Do Ano

Vargas

Nörnberg²,

Scheibler

et al. 2019

Ciênc. anim. bras.

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Qualidade físico-química e microbiológica do leite bovino em diferentes sistemas... combinação entre a estação primavera e o sistema semiespecializado de produção. Palavras-chave: análise multivariada, análise de componentes principais, qualidade do leite, tipologia, unidades produtoras de leite. AbstractThe objective of this work was to evaluate the effect of the interaction between production systems and seasons on physical-chemical and microbiological qualities of bovine milk. Three farms were assessed monthly, along the seasons, for four specialization levels of the production systems: highly specialized, specialized, partially specialized, and non-specialized. In terms of milk quality, the levels of fat, protein, total solids, somatic cell count, total bacterial count, titratable acidity in degrees Dornic, density, cryoscopic index, alizarol stability, potential of hydrogen (pH) and methylene blue reduction test. In addition, due to their importance for the industrial yield of protein-based dairy products, total milk protein fractionation was performed in protein equivalent of non-protein nitrogen, true protein and casein.The milk Dornic acidity was higher in spring and winter, while the highest somatic cell count values were in the summer. Total and true protein levels were lower during the summer and total solids increased in the autumn. With the decrease in the levels of specialization of farms, there was an increase in total bacterial count and decrease in non-protein nitrogen. The density presented an inverse behavior to that of the fat while the hydrogen potential (pH) was expressed in a way antagonistic to the acidity. In the multivariate analysis of the data it was possible to identify the combinations between production strata and stations that presented the best milk protein quality. In this sense, all the arrangements of production systems with autumn, winter highly specialized, summer partially specialized, spring specialized had positive protein quality, being highlighted by the smaller of somatic cells counts in the spring partially specialized combination.

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“…Due to this fact, there may have been small variations in lactose concentration in the milk % TDN in the diet for dairy goats of the supplemented animals, thus explaining the slight but significant difference (p<0.05) in the milk from goats supplemented with concentrate compared with the milk from goats of the control group, without concentrate (Table 4) (Gonzáles et al, 2004;Abrantes et al, 2015). Vargas et al (2015) reported that the season may enhance the stress condition of the animals, either by reducing dry matter intake so that the animals cannot reach their daily needs, mainly in energy, or because of the hormonal mechanisms triggered by the stress causing weak immune response to the microorganisms, making them susceptible to diseases, such as mastitis that can also affect the quality and physical and chemical parameters of milk.…”

Section: Discussionmentioning

confidence: 99%

<b>Physical and chemical characteristics of milk from goats supplemented with different levels of total digestible nutrients in the dry period

Nascimento

Júnior

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. We evaluated the physical and chemical characteristics of raw milk from goats supplemented with levels of Total Digestible Nutrients (TDN) in the dry period. Samples from 20 goats were divided into 4 groups, 3 groups received 400g concentrate per animal with different levels of TDN (65, 75 and 85%), and the control group (without concentrate). Four samples of milk were used for each animal, in four sampling periods, which were subjected to physical and chemical analysis. There was no significant difference between the treatments for the parameters of acidity and fat. The diet without concentrate presented higher value for the cryoscopic index. Mean values of the four treatments were within the range set by the Brazilian legislation for all parameters evaluated. The use of concentrate, containing 85% TDN in goat supplementation, was favored the physical and chemical characteristics of the milk during the dry period.Keywords: concentrate, legislation, raw caprine milk.Características físico-químicas do leite de cabras suplementadas com diferentes teores de nutrientes digestíveis totais durante o período seco do ano RESUMO. Este trabalho teve por objetivo avaliar as características físico-químicas do leite de cabras suplementadas com teores de Nutrientes Digestíveis Totais (NDT) no período seco do ano. Foram utilizadas amostras de leite de 20 cabras as quais foram divididas em quatro grupos, sendo que três grupos receberam suplementação de 400 g de concentrado por animal com diferentes teores de NDT (65, 75 ou 85%) e o grupo controle que não recebeu concentrado. Foram utilizadas quatro amostras de leite para cada animal, em quatros períodos de coleta, as quais foram submetidas à análise físico-química de acidez titulável, crioscopia e gordura. Não houve diferença entre os tratamentos para os parâmetros de acidez e gordura. As amostras de leite dos animais que receberam a dieta sem concentrado apresentaram maior valor para o índice crioscópico. As médias das amostras dos quatro tratamentos estavam dentro dos parâmetros fixados pela legislação brasileira para todos os parâmetros avaliados. A utilização de concentrado contendo teor de 85% de NDT na suplementação de cabras favoreceu as características físico-químicas do leite durante o período seco.Palavras-chave: concentrado, legislação, leite cru caprino.

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Qualidade e potencial nutracêutico do leite bovino em diferentes sistemas de produção e estações do ano

Cited by 7 publications

References 20 publications

Quality indicators of tank milk in different production systems of tropical regions

Quality indicators of tank milk in different production systems of tropical regions

Qualidade Físico-Química E Microbiológica Do Leite Bovino Em Diferentes Sistemas De Produção E Estações Do Ano

<b>Physical and chemical characteristics of milk from goats supplemented with different levels of total digestible nutrients in the dry period

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