Effect of Hydrogenated Fat on Feed Intake, Nutrient Digestion, and Lactation Performance of Dairy Cows

Jenkins, T.C.; Jenny, B.F.

doi:10.3168/jds.s0022-0302(89)79363-2

Cited by 114 publications

(81 citation statements)

References 22 publications

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“…Therefore, extensive use of fat in ruminant diets has been limited because of the inhibitory effects of fatty acids on ruminal microbial metabolism Jenkins 1980, Merchen et al 1997). Apparent total tract digestibilities of fibre components decrease by supplementation of fats, particularly when large amounts of highly unsaturated vegetable oils (Ward et al 1957), oilseeds (Drackley et al 1985) or unsaturated animal fats, such as yellow grease (Jenkins and Jenny 1989), are fed. According to Doreau and Chillard (1997), dietary supplementation with fat, especially polyunsaturated fats, of more than 50 g added fat kg -1 concentrates, has an increasingly adverse effect on ruminal digestion of fibre.…”

Section: Discussionmentioning

confidence: 99%

Effects of replacing different proportions of barley grain by barley fibre on performance of dairy bulls

Huuskonen¹,

Khalili²,

Joki‐Tokola³

2008

AFSci

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The objective of the present experiment was to study the effects of partial replacement of barley grain with barley fibre (BF) on animal performance, carcass traits and diet digestibility of growing dairy bulls. The feeding experiment comprised 20 Finnish Ayrshire bulls and 12 Holstein-Friesian bulls, and four treatments (8 bulls per treatment). There were four diets with two offered at stage 1 (from the initiation of the study to 450 kg live weight) and four at stage 2 (from 450 kg live weight to slaughter). The control diet (BF0) included grass silage (460 g kg -1 dry matter) and barley grain (540), BF25 diet included grass silage (460), barley grain (405) and BF (135), BF50 diet included grass silage (460), barley grain (270) and BF (270), and BF75 diet included grass silage (460), barley grain (135) and BF (405). At stage 1 there were only two treatments (BF0 and BF50) and at stage 2, all four treatments were included. All bulls were fed total mixed ration ad libitum. The mean initial live weight of the bulls was 261 kg and the mean final live weight 650 kg. At stage 1 there were no significant treatment differences in dry matter, energy or protein intakes or in live weight gain. At stage 2, replacing barley grain with BF led to a linear decrease of daily live weight gain (P < 0.05) and a linearly reduced feed conversion (kg dry matter kg -1 live weight gain) (P < 0.05). The apparent digestibility of the organic matter and neutral detergent fibre decreased linearly with increasing BF supplementation (P < 0.001). The dressing proportion and the carcass fat score decreased linearly (P < 0.05) with partial replacement of barley grain with BF. On carcass conformation, treatment had a significant (P < 0.05) quadratic effect: the BF25 and BF50 diets were classified highest. The results indicate that 50% of barley starch can be replaced with BF without affecting growth, but feed efficiency factors may decrease when barley starch is replaced with BF. At 75% replacement, feed intake was reduced, which resulted in a lower energy intake and reduced level of performance.

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Section: Discussionmentioning

confidence: 99%

Effects of replacing different proportions of barley grain by barley fibre on performance of dairy bulls

Huuskonen¹,

Khalili²,

Joki‐Tokola³

2008

AFSci

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“…Thus, for the lipid supplement S the flow of C18:0 to the duodenum will be higher than what is present in the supplement as a consequence of biohydrogenation. However, there are concerns with dietary lipids that the amount of unsaturated FA and the proportion of unsaturated FA in the unesterified form could reduce Dry Matter (DM) intake and have detrimental effects of rumen fermentation (Jenkins & Jenny 1989;Eastridge & Firkins 1991). This concern has contributed to the development of rumen inert lipids.…”

Section: Introductionmentioning

confidence: 99%

Impacts of feeding lipid supplements high in palmitic acid or stearic acid on performance of lactating dairy cows

Chamberlain

DePeters

2016

Journal of Applied Animal Research

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Effects of feeding lipid supplements high in free fatty acids (FAs) of palmitate (C16:0) or stearate (C18:0) plus C18:1 cis 9&10 on milk yield and composition, apparent whole-tract apparent digestibility of FA, and the FA composition of milk lipids were studied. Four lactating Holstein cows with ruminal cannulae were used in a 4 × 4 Latin square assignment of four dietary treatments. Lipid supplements were enriched in free fatty concentrations of either palmitic acid (P) or stearic acid (S). The total mixed-ration contained 20 g/kg of lipid supplement that consisted of varying proportions of P to S. Treatments were: 100:0 P:S (P), 0:100 P:S (S), and two mixtures including 66:34 P:S (PS) and 34:66 P:S (SP). Milk yield and dry matter intake were not affected by lipid supplement, but the concentration and yield of fat in milk increased with increasing C16:0 in the lipid supplement. Increasing the C16:0 concentration in the lipid supplement increased its concentration in milk lipids while increasing C18:0 in the lipid supplement increased C18:0 concentration in milk fat. Whole-tract apparent digestibility of neutral detergent fiber (NDF) did not differ with lipid supplement, but organic matter digestibility tended to decrease with increasing C18:0 in the lipid supplement. Whole-tract digestibility of total FAs decreased with the increasing proportion of C18:0 to C16:0 in the lipid supplement. Apparent digestibility of C16:0 and C18:0 was not different within dietary treatment. The FA composition of the lipid supplement impacted both whole-tract digestibility of FAs and FA composition of milk lipids. ARTICLE HISTORY

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“…Nos alimentos, procedeu-se também às análises de nitrogênio insolúvel em detergente neutro (NIDN) e nitrogênio insolúvel em detergente ácido (NIDA), de acordo com técnicas descritas por Licitra et al (1996), e de lignina em detergente ácido (LDA), conforme descrito por Pereira & Rossi Jr. (1995). Nas amostras de urina, foram determinados os percentuais de NT.…”

Section: Methodsunclassified

Suplementação de lipídios em dietas para cabras em lactação: consumo e eficiência de utilização de nutrientes

Silva¹,

Rodrigues²,

Branco³

et al. 2007

R. Bras. Zootec.

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RESUMO -O efeito de diferentes formas de suplementação lipídica sobre o consumo, a digestibilidade, o balanço de compostos nitrogenados, a produção de leite e a eficiência de utilização de nutrientes em cabras lactantes foi testado com a inclusão de óleo de soja (OS), sais de cálcio de ácidos graxos de cadeia longa (SC) e grão de soja (GS) na dieta. Foram utilizadas 24 cabras lactantes, alocadas em delineamento inteiramente casualizado, com quatro tratamentos e seis repetições. Os tratamentos consistiram de uma dieta controle (C), com 2,2% de EE e isenta de lipídio suplementar, e de três outras dietas, adicionadas de um dos suplementos testados, contribuindo com 4,5% de EE suplementar. O consumo voluntário e a produção de leite foram monitorados diariamente no período de 51 a 138 dias de lactação. Effects of fat supplements on intake and efficiency of nutrient utilization in lactating dairy goats ABSTRACT -The effect of different fat supplements on intake, digestibility, nitrogen balance, milk yield and efficiency of nutrient utilization was evaluated in lactating dairy goats. Twenty-four dairy goats were assigned to a completely randomized design with four treatments and six replicates/treatment. The fat supplements tested were soybean oil (SO), calcium salts of longchain fatty acids (CS) and whole soybean (WS), which contributed with 4.5% of dietary ether extract. A control diet with no added fat was also fed to the animals. Daily measurements of intake and milk yield were done from day 51 to day 138 of lactation.Intakes of DM (DMI), NDF (NDFI), TDN (TDNI), and net energy (NEI) were lower on soybean oil and whole soybean than on control and CS diets. Feeding fat supplements to lactating goats reduced digestibilities of OM, CP and TC. Digestibility of NDF was reduced by SO while that of NFC was reduced by WS. Yields of milk fat, milk protein and milk decreased when WS was fed and the feeding of all three fat supplements depressed the yield of milk lactose. No significant differences in the concentration of milk components were observed across treatments. Similarly, the net efficiency of utilization of ingested metabolizable energy for milk production (kl) did not differ among diets. The same was true for nitrogen balance and retained nitrogen.Key Words: calcium salts of fatty acids, goats, milk, oil, production, soybean IntroduçãoA produção de leite é um processo metabólico altamente dependente de energia. No início da lactação, ocorrem simultaneamente redução da capacidade de ingestão de MS e elevação das exigências energéticas, em razão da maior produção. Assim, os animais, por meio da homeorresia (Bauman, 2000), mobilizam suas reservas corporais para atender esta condição fisiológica.

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Effect of Hydrogenated Fat on Feed Intake, Nutrient Digestion, and Lactation Performance of Dairy Cows

Cited by 114 publications

References 22 publications

Effects of replacing different proportions of barley grain by barley fibre on performance of dairy bulls

Effects of replacing different proportions of barley grain by barley fibre on performance of dairy bulls

Impacts of feeding lipid supplements high in palmitic acid or stearic acid on performance of lactating dairy cows

Suplementação de lipídios em dietas para cabras em lactação: consumo e eficiência de utilização de nutrientes

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