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

Aguiar, Ana Cássia Rodrigues de; Júnior, Vicente Ribeiro Rocha; Caldeira, Luciana Albuquerque; Filho, Silvio Humberto Cardoso de Almeida; Ruas, José Reinaldo Mendes; Souza, Vanice Mendes de; Costa, Maria Dulcinéia da; Pires, Daniel Ananias de Assis

doi:10.1590/s1519-99402015000300011

Cited by 9 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is because most CP of castor bean cake and cotton cake was adhered to the cell wall with slow ruminal degradation, as can be observed with the values of fraction B of these byproducts that were 27.7% and 18.10% higher than the sunflower meal (51.14% average), respectively. According to Aguiar et al (2015), 0.42% DM of sunflower meal and castor bean meal is represented by the neutral detergent insoluble nitrogen corroborating the results found in this study. Goes et al (2011) reported values of PD and ED of CP of soybean meal in the order of 98.97% and 52.83%.…”

Section: Resultssupporting

confidence: 91%

Ruminal degradation of dry matter, crude protein and fiber fraction of oilseed byproducts

Antunes

Pires

Teixeira

et al. 2019

SCA

View full text Add to dashboard Cite

The objective was to evaluate the rumen degradability of dry matter, crude protein and fiber fraction of some oilseed byproducts. Oilseed byproducts evaluated were: Sunflower Meal, Cotton Cake and Castor Bean Cake. The rumen degradability test was performed following a split plot randomized complete block design with three treatments (plots) and seven incubation times (subplots) and six blocks (animals). The readily soluble fraction of the dry matter of sunflower meal was 35.0% higher than the same fraction of cotton cake and castor bean cake (mean 24.46%, P < 0.01). The highest potential degradability of crude protein (P < 0.01) was verified in castor bean cake (96.90%, 5% rate of passage). Sunflower meal had the lowest insoluble fraction of the fiber fraction, 34.4%, compared to cotton cake and castor bean cake, with 64.4% and 39.4%, respectively (P < 0.01). Sunflower meal had the highest fiber effective degradability (25.2%). Sunflower meal presented better values of ruminal parameters of dry matter, crude protein and neutral detergent fiber in relation to the other byproducts.

show abstract

Section: Resultssupporting

confidence: 91%

Ruminal degradation of dry matter, crude protein and fiber fraction of oilseed byproducts

Antunes

Pires

Teixeira

et al. 2019

SCA

View full text Add to dashboard Cite

show abstract

“…The atherogenicity index (AI) and thrombogenicity index (TI) values obtained (Table 6) were lower than or similar to those found in the literature (Barros et al, 2013;Aguiar et al, 2015), indicating that the diets tested did not interfere negatively in these qualitative indexes. The indexes obtained are relevant because they indicate the potential for stimulating platelet aggregation, that is, lower indices are related to higher proportions of antiatherogenic FAs and/or a lower proportion of atherogenic FAs in food fat and, therefore, a greater potential for preventing cardiovascular disease (Tonial et al, 2010).…”

Section: Discussionsupporting

confidence: 74%

Milk fatty acid profile of dairy cows fed diets based on sugarcane bagasse in the Brazilian region

Freitas

Gama²,

Silva

et al. 2019

Chil. j. agric. res.

View full text Add to dashboard Cite

Little is known about milk fatty acid (FA) profile of cows fed diets based on sugarcane (Saccharum officinarum L.) bagasse. This study aimed to evaluate FA profile and nutritional quality indexes of milk fat of cows fed sugarcane bagasse and concentrate in the Brazilian northeast semiarid region. Multiparous Girolando cows were allocated in four diets based on different levels of sugarcane bagasse (30%, 38%, 46%, and 54% total DM) added to concentrate. Fatty acids C18:1 trans-11 (lowest value for 46% inclusion) and conjugated linoleic acid (CLA) cis-9, trans-11 (lowest value for 46% inclusion) in milk fat presented a quadratic pattern (P < 0.05). This trend was also observed for C18:1 cis-9 (P < 0.05), but at a lower magnitude. There was a reduction in concentration of C18:1 trans-10 (0.320 to 0.148 g 100 g-1 total FA) and CLA trans-10, cis-12 (0.008 to 0.004 g 100 g-1 total FA) according to the levels of sugarcane bagasse increase. The greater inclusion of bagasse and consequent reduction in the proportion of concentrate, notably corn, cause an increase in concentration of medium-chain saturated FA and a linear reduction of C18:3 n-3 and C18:2 n-6, with a consequent increase in the indexes of atherogenicity (2.82 to 3.2) and thrombogenicity (3.39 to 3.84) and a decrease in ratio of hypo/ hyper-cholesterolemic (0.44 to 0.37) and ω-6:ω-3 (12.44 to 8.80) in milk fat. Results indicate that different levels of sugarcane bagasse change the FA content in cows' milk when bagasse is an exclusive roughage source in the diet. The greater inclusion of sugarcane bagasse reduces the quality of milk fat of dairy cows. The lowest level of sugarcane bagasse inclusion tested (30%) promotes greater milk yield and healthier milk fat.

show abstract

“…Total dry extract content was higher in cows at the third calving compared with animals at the first and second calving ( indicators of milk quality, being represented by the sum of all solids, such as fat and protein, which were considered by the dairy industries as the components that generate income for dairy products where producers receive payment for the product delivered to industry (Aguiar et al, 2008). Taking into consideration the TDE, protein levels also had greater values in cows at the first calving, contributing to the increase in TDE.…”

Section: Resultsmentioning

confidence: 99%

<b>Milk composition and blood metabolic profile from holstein cows at different calving orders and lactation stages

Dias

Leão

Carmo

et al. 2017

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

ABSTRACT. This study aimed to evaluate milk composition and metabolic profile of Holstein cows at different calving orders in the beginning, middle, and end of lactation. One hundred ten Holstein cows were housed in a free stall system receiving the same diet and were grouped according to calving order (first, second, third, and fourth calving) and days in milk (DIM): early (1-90 DIM), middle (91-180 DIM), and end of lactation (over 181 DIM) for comparing milk yield, milk composition, and blood metabolic profile between the calving orders within the same lactation period. These parameters were also evaluated between lactation periods of the cows in different calving orders. The calving order, in any lactation stage, had no influence on milk yield per day and blood biochemical profile of Holstein cows receiving the same diet. However, calving order in all stages of lactation influenced milk composition. The first, second, third, and fourth calving order had no effect on the blood biochemical profile of Holstein cows, in any lactation stage. On the other hand, the different stages of lactation influenced milk yield and milk composition of Holstein cows.Keywords: biochemical profile, lactation period, milk quality.Composição do leite e perfil metabólico sanguíneo de vacas holandesas em diferentes ordens de parto e estádios de lactação RESUMO. Objetivou-se avaliar a composição do leite e perfil metabólico de vacas da raça Holandesa em diferentes ordens de parto, no início, meio e fim de lactação. Foram utilizadas 110 vacas mantidas em sistema Free stal, recebendo a mesma dieta. Os animais foram agrupados de acordo com a ordem de parto em diferentes dias em lactação (DEL), início (1-90 DEL), meio (91-180 DEL) e fim de lactação (mais de 181 DEL), para a comparação da produção de leite, composição química do leite e perfil metabólico do sangue entre as ordens de parto dentro do mesmo período de lactação. Estes parâmetros também foram avaliados entre os períodos de lactação das vacas em diferentes ordens de parto. A ordem de parto, em nenhum estádio de lactação, influenciou a produção de leite por dia e o perfil bioquímico do sangue de vacas Holandesas que recebiam a mesma dieta. Entretanto, a ordem de parto em todos estádios de lactação influenciou a composição química do leite. A primeira, segunda, terceira e quarta ordem de parto em nenhum estádio de lactação influenciaram o perfil bioquímico do sangue de vacas Holandesas. Por outro lado, diferentes estádios de lactação influenciaram a produção e composição química do leite.Palavras-chave: perfil bioquímico, período de lactação, qualidade do leite.

show abstract

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

Cited by 9 publications

References 25 publications

Ruminal degradation of dry matter, crude protein and fiber fraction of oilseed byproducts

Ruminal degradation of dry matter, crude protein and fiber fraction of oilseed byproducts

Milk fatty acid profile of dairy cows fed diets based on sugarcane bagasse in the Brazilian region

<b>Milk composition and blood metabolic profile from holstein cows at different calving orders and lactation stages

Contact Info

Product

Resources

About