Suplementação de lipídeos de diferentes fontes em dietas para vacas Jersey na fase inicial de lactação

Costa, Patrícia Barcellos; Júnior, Waldyr Stumpf; Nörnberg, José Laerte; Fischer, Vívian; Queiróz, Augusto César de; Mello, Renius

doi:10.1590/s1516-35982007000400019

Cited by 2 publications

(4 citation statements)

References 23 publications

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“…Duarte et al (2005) did not find any effects of the supplementation or the source of fat used on DMI in dairy cows. The mean DMI (15.7 kg/day) observed in this work was similar to the 15.9 and 16.1 kg/day found by Borba et al (2006) and Costa et al (2007), respectively. These authors also worked with sources of lipids for lactating cows.…”

Section: Discussionsupporting

confidence: 92%

“…According to the results of Borba et al (2006), Freitas Júnior et al (2010, and the present work, levels of up to 80 g/kg of EE in the diet do not interfere with the production, and the producer may opt for the diet that is most economic. Costa et al (2007) reported increased corrected milk production when using diets with 50.0 g/kg of EE containing protected oil, whole rice meal plus rice oil, and whole rice meal plus bovine tallow as sources of lipids. This increase in production when using lipids in the diet is related to the increased ingestion of energy.…”

Section: Discussionmentioning

confidence: 99%

“…Low-energy diets lead to reduced milk production and promote excessive weight loss, especially during early lactation, as dairy cows mobilize body fat to keep milk production, thus jeopardizing reproduction. However, diets with excess energy raise production costs due to more spending on feed, and can be a problem for the cow's metabolism (Costa et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Intake, apparent digestibility, production, and composition of milk from cows fed diets with different sources of lipids

et al. 2016

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-The objective of this study was to evaluate the effect of different sources of lipids in the diets of dairy cows on the intake and digestibility of nutritional fractions, and milk production and composition. The experiment was conducted in a 42-hectare area divided into eight paddocks covered with Brachiaria brizantha. Twelve crossbred Holstein × Zebu cows were distributed into three simultaneous 4 × 4 Latin squares. The treatments consisted of different sources of lipids, as follows: diet with no extra source of lipids; diet with cottonseed as the source of lipids; diet with soy oil; and diet with used frying soy oil. The intakes of dry matter, neutral detergent fiber, crude protein, total carbohydrates, and nonfibrous carbohydrates were similar for all diets. The use of lipid sources caused a decrease in the apparent digestibility of dry matter, neutral detergent fiber, non-fibrous carbohydrates, and crude protein. The levels of protein, lactose, and defatted dry matter were reduced with the use of lipid sources but did not affect milk production. The use of cottonseed, soy oil, and used frying soy oil as sources of lipids in diets for lactating cows at pasture do not improve milk production, and their use is therefore optional.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intake, apparent digestibility, production, and composition of milk from cows fed diets with different sources of lipids

et al. 2016

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“…In this aspect, positive results for milk yield with fat-supplemented diets were obtained by Costa et al (2007) and absence of responses by Eifert et al (2006), Huang et al (2008), and Ganjkhanlou et al (2009).…”

Section: Discussionmentioning

confidence: 96%

Influence of lipid supplementation on milk components and fatty acid profile

et al. 2017

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-The objective of this study was to evaluate the effects of different lipid sources in diets for lactating cows on milk yield and composition, conjugated linoleic acid (CLA) content, and fatty acid profile in the milk fat. Five primiparous Holstein cows were distributed in a 5 × 5 Latin square design. Treatments were: control (no lipid addition) and four other diets containing different lipids sources -ground raw soybean, cottonseed, soybean oil, and calcium salts of soybean fatty acids (CSSFA). The greater milk yield (kg/day) and milk lactose (g/kg) and solids non-fat (g/kg) contents were obtained with the animals fed diets with CSSFA. Regarding the fatty acid profile in the milk fat, the diets with CSSFA and ground raw soybeans produced the greatest concentrations of polyunsaturated fatty acids and C 18:2 . Supplementation with CSSFA provided a greater production (g/day) of CLA, resulting in almost twice the values shown by the other treatments. The use of different lipid sources does not affect the milk total solids (protein, fat, and lactose) and CSSFA has a positive influence on the fatty acid profile of the milk fat and amount of CLA produced. Additionally, milk yield is not affected by this supplement.Key Words: biohydrogenation, dairy production, fatty acids, supplementation Revista Brasileira de Zootecnia

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Suplementação de lipídeos de diferentes fontes em dietas para vacas Jersey na fase inicial de lactação

Cited by 2 publications

References 23 publications

Intake, apparent digestibility, production, and composition of milk from cows fed diets with different sources of lipids

Intake, apparent digestibility, production, and composition of milk from cows fed diets with different sources of lipids

Influence of lipid supplementation on milk components and fatty acid profile

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