Composição do leite de vacas Holandesas em pastejo de azevém com a utilização do trevo branco como fonte proteica

Krolow, Rodrigo Holz; Silva, Marcelo Abreu da; Paim, Nilton Rodrigues; Medeiros, Renato Borges de; Gonzalez, Helenice de Lima

doi:10.1590/s0102-09352012000500036

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…A inclusão de fontes protéicas alternativas na alimentação de vacas em lactação tem como principal objetivo baixar os custos com a alimentação e manter os níveis de produção e a qualidade do leite (KROLOW et al, 2012;PINA et al, 2006). Muitos estudos têm correlacionado a suplementação de proteína na dieta com seu metabolismo (BRODERICK & REYNAL, 2009;CHIZZOTTI et al, 2007;HOJMAN et al, 2004) Rev.…”

Section: Introductionunclassified

Composição do leite de vacas alimentadas com diferentes fontes de compostos nitrogenados

Aguiar

Júnior

Caldeira

et al. 2015

Rev. bras. saúde prod. anim.

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ResumoObjetivou-se avaliar a composição físico-química e o perfil de ácidos graxos do leite de vacas alimentadas com diferentes fontes de compostos nitrogenados (farelo de soja, ureia, farelo de girassol e farelo de mamona detoxicado). O delineamento experimental foram dois quadrados latinos 4 x 4, sendo utilizadas oito vacas F1 Holandês/Zebu, com produção média de 20 Kg de leite com 3,5% de gordura dia-1. Amostras de leite foram coletadas e analisadas quanto à composição físico-química e perfil de ácidos graxos. Com exceção do nitrogênio ureico no leite, que foi maior na dieta com ureia, as demais variáveis da composição físico-química não foram influenciadas pelas dietas com diferentes fontes de compostos nitrogenados. Quanto ao perfil de ácido graxo houve variação nas concentrações dos ácidos C4:0; C18:0; C10:1; C12:1 e C18:1 T10 T11 T12. No entanto, para os totais de ácidos graxos saturados, monoinsaturados e poliinsaturados no leite, estes não diferiram entre as fontes de compostos nitrogenados. O uso de diferentes fontes de compostos nitrogenados na dieta de vacas F1 Holandês x Zebu, com produção média de 20Kg de leite com 3,5% de gordura dia-1, não altera a composição físico-química do leite, com exceção do nitrogênio uréico que aumenta na dieta com ureia. Entretanto, pode modificar o perfil de ácidos graxos da gordura do leite.

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Section: Introductionunclassified

Composição do leite de vacas alimentadas com diferentes fontes de compostos nitrogenados

Aguiar

Júnior

Caldeira

et al. 2015

Rev. bras. saúde prod. anim.

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“…In the milk activity, many MPUs seek to increase milk production only by increasing the number of animals, especially lactating cows (O'DRISCOLL et al, 2010). However, in order for this goal to be achieved, the number of animals and the food production capacity of the MPUs must be increased at the same time (KROLOW et al, 2012). These MPUs should seek subsidies for the formation of pastures, which are allies of preserved foods and concentrates that meet the nutritional needs of the animals, guaranteeing their maintenance, production, and reproduction.…”

Section: Resultsmentioning

confidence: 99%

Milk production units characterized by sanitary, nutritional and infrastructure variables in the northwest, center western and southwest mesoregions of Rio Grande do Sul, Brazil

Tadielo

Bremm²,

Kasper³

et al. 2020

Biosci. J.

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Evaluating and characterizing production systems using farm characteristics allows the diagnosis of failing points. This diagnosis can be used to improve the productive and zootechnical indices. Little is known about the milk production systems in the state of Rio Grande do Sul, therefore, the aim of this study was to characterize the milk production systems of the Northwest, Center Western and Southwest mesoregions of Rio Grande do Sul, considering the infrastructure, milk handling, milk quantity and composition, and nutritional intake of the cattle. To conduct this study, 38 Milk Production Units (MPUs) registered at the Municipal Secretaries of Agriculture and Emater/Ascar-RS were randomly selected. After being randomly selected, the dairy farms were visited and a semi-structured guide questionnaire was applied and milk samples were collected from expansion tanks. The milk was analyzed for somatic cell counts (SCC) and total bacterial counts (TBC). Data were evaluated through principal component analysis and cluster analysis. Multivariate analysis allowed the investigated variables to be reduced into two main components (CP1 and CP2). These two showed eigenvalues greater than 1 (alpha> 1) and together explained 55.05% of the characteristics variability of the 38 MPUs studied. CP1 contemplated productive capacity and factors related to nutritional management of the MPUs, interfering directly with reproductive performance. CP2 comprised milk handling and daily production. Using these main variables, the data set generated from the 38 MPUs studied were adjusted and classified into five groups (G1, G2, G3, G4, and G5). The characteristics of these groups differed statistically especially in infrastructure and nutritional management of the cattle. Due to their particularities, each of these five groups of MPUs requires strategic technical interventions to improve their productive indexes.

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“…The percentages of protein, lactose, and non-fat solids in milk decreased linearly with the reduction in concentrate levels in the diet. According to Krolow et al [ 36 ], lactose concentration of cow milk has little dietary-dependent variability. However, in this study, the lactose content decreased linearly with the decrease of concentrate supplementation level.…”

Section: Resultsmentioning

confidence: 99%

Milk Potential of Pantaneira Cows, a Local Breed, at Organic System

Biazolli

Oliveira

Luz

et al. 2020

Animals

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Pantaneiro cattle (Bos taurus taurus) is a breed locally adapted to the Brazilian Pantanal. Local breeds are essential for the quality production of organic systems based on planned grazing practices, because of their results in resilient and productive ecosystems, enhancing biodiversity. This study aimed to evaluate the performance of Pantaneira primiparous cows, and systems with reduced use of concentrate, simulating organic production conditions. Five animals, with an average body weight of 396.2 ± 43.5 kg, were kept in individual continuous grazing regimes and supplemented with different concentrate levels (1.2%, 0.9%, 0.6%, 0.3%, and 0.0% of body weight). The animals were allocated at random in a 5 × 5 Latin square design repeated twice during the study time. The cows had a low dry matter and nutrient intake with a reduction in concentrate level, with improvement in neutral detergent fiber digestibility and a reduction in total nutrient digestibility. No changes were observed in plasma glucose levels or urea excretion, but the plasma urea nitrogen decreased with reductions in concentrate levels. There was a reduction in milk yield, but the energy-corrected milk was not affected by the reduction in concentrate levels; furthermore, the milk yield efficiency was not affected. The milk fat content improved with the reduction in concentrate levels. The Pantaneira breed has the genetic potential for the maintenance of competitive production and quality in organic systems.

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Composição do leite de vacas Holandesas em pastejo de azevém com a utilização do trevo branco como fonte proteica

Cited by 5 publications

References 20 publications

Composição do leite de vacas alimentadas com diferentes fontes de compostos nitrogenados

Composição do leite de vacas alimentadas com diferentes fontes de compostos nitrogenados

Milk production units characterized by sanitary, nutritional and infrastructure variables in the northwest, center western and southwest mesoregions of Rio Grande do Sul, Brazil

Milk Potential of Pantaneira Cows, a Local Breed, at Organic System

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