Effect of inclusion of protected and unprotected tallow in the supplement on the performance of lactating dairy cows

Murphy, John J.; Morgan, D.J.

doi:10.1017/s0003356100001744

Cited by 29 publications

(17 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This effect, while small, is directly in line with that reported from this Institute earlier (Gordon and Peoples, 1986) and similar to that reported by Murphy and Morgan (1980). This effect, while small, is directly in line with that reported from this Institute earlier (Gordon and Peoples, 1986) and similar to that reported by Murphy and Morgan (1980).…”

Section: Response To Fat Concentration Of the Supplementsupporting

confidence: 91%

“…Similar effects have been reported from this Institute earlier (Gordon and Peoples, 1986) as well as by other workers (Murphy and Morgan 1980;van der Honing, Wieman, Steg and van Donselaar, 1981). Similar effects have been reported from this Institute earlier (Gordon and Peoples, 1986) as well as by other workers (Murphy and Morgan 1980;van der Honing, Wieman, Steg and van Donselaar, 1981).…”

Section: Effect Of Protein Concentration Of the Supplementsupporting

confidence: 90%

See 1 more Smart Citation

The influence of wilting and season of silage harvest and the fat and protein concentration of the supplement on milk production and food utilization by lactating cattle

Peoples

Gordon

1989

Anim. Sci.

View full text Add to dashboard Cite

This study was designed to examine the influence of pre-wilting and season of harvesting of silage on milk production and food utilization by dairy cattle and also the response to protein and fat concentration of the supplement given with silage. Twenty-four lactating British Friesian cows were used i n a four-period, partially balanced, change-over design experiment to evaluate 12 treatments consisting of three silage types (spring harvest unwilted (lUnW), autumn harvest unwilted (3UnW) and autumn harvest wilted (3W), each offered in addition to supplements containing both two crude protein levels (160 and 210 g/kg fresh weight) and two levels of inclusion of a fat supplement (0 and 100 g/kg fresh weight) in a 3 × 2 × 2 factorial arrangement. All supplements were offered at the same rate of 6·8 kg/day. Total diet digestibility and food utilization studies were carried out on all animals at the end of the third and fourth experimental periods.The wilted silage (3W) had a higher digestibility than the unwilted (3UnW) material and animals offered 3W silage consumed proportionately 0·18 more silage DM and produced 1·6 MJ/day more milk energy output than those offered 3UnW. The total ration digesibility and food utilization data showed the animals given the 3W silage consumed 13·5 MJ more metabolizable energy (ME) per day than those offered the 3UnW silage and were less efficient at converting the ME available for production into milk energy output than those given the 3UnW silage (efficiencies were 0·58 and 0·53 for 3UnW and 3W silages respectively).There were no differences between the digestibilities of the spring (lUnW) and autumn (3UnW) silages with the concentrations of digestible organic matter in the dry matter (DM) being 650 and 648 g/kg respectively. However, animals offered lUnW silage consumed proportionately 0·12 more DM and produced 1·05 kg/day more fat-corrected milk than those given 3UnW silage. The food utilization data indicated that this milk production difference could be accounted for by the higher ME intake on lUnW and that the efficiencies of conversion of ME available for production to milk energy output were similar with both seasons of harvests (efficiencies were 0·57 and 0·58 for lUnW and 3UnW respectively).Increasing the crude protein concentration of the supplement from 160 to 210 g/kg increased silage DM intake, milk yield and milk energy output by 0·2 kg, 0·66 kg and 1·9 MJ/day respectively with the response being greatest with lUnW and least with 3UnW silage. Increasing the fat concentration of the supplement depressed silage DM intake but increased milk yield by 0·53 kg/day.The effects of the treatments on total diet digestibility, energy and nitrogen utilization, and the volatile fatty acid concentrations of rumen fluid are also given.

show abstract

Section: Response To Fat Concentration Of the Supplementsupporting

confidence: 91%

Section: Effect Of Protein Concentration Of the Supplementsupporting

confidence: 90%

The influence of wilting and season of silage harvest and the fat and protein concentration of the supplement on milk production and food utilization by lactating cattle

Peoples

Gordon

1989

Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…A relação acetato:propionato no líquido ruminal é influenciada pela dieta, variando de 3,5:1 em dieta à base de volumoso a 1,25:1 em dieta rica em concentrado (Nagaraja et al, 1997). Entretanto, Lana et al (1998) verificaram maior correlação entre o pH que o nível de concentrado com a relação acetato:propionato.…”

Section: Resultsunclassified

“…Durante um período de duas a quatro horas após a alimentação, os tratamentos que continham sebo resultaram em menores concentrações de amônia ruminal e maiores valores de pH do líquido ruminal. Murphy & Morgan (1983) utilizaram 20 vacas da raça holandesa, aos 32 dias pós-parto, para testar três concentrados: cevada mais farelo de soja (controle), cevada mais farelo de soja com sebo não protegido e cevada mais farelo de soja com sebo protegido com formaldeído. O concentrado com sebo não protegido não obteve efeito significativo sobre a produção de leite, concentração de gordura e lactose no leite, porém estas foram aumentadas com o sebo protegido, mas a concentração de proteína diminuiu.…”

Section: Introductionunclassified

Adição de Lipídios na Ração de Vacas Leiteiras: Parâmetros Fermentativos Ruminais, Produção e Composição do Leite

et al. 2002

View full text Add to dashboard Cite

RESUMO -Objetivou-se avaliar o efeito de dois níveis de lipídios (3 e 7%) na dieta de vacas em lactação e, dentro do nível de 7% avaliar duas fontes de lipídios (grão de soja moído e óleo de soja), sobre a produção e composição do leite, os parâmetros ruminais, a atividade de produção de amônia pela microbiota ruminal e o consumo de MS. Foram usadas seis vacas multíparas holandesas, puras e mestiças, com 500 kg de peso corporal, 30 dias pós-parto e produção média de 20 litros de leite/dia, distribuídas em dois quadrados latinos 3x3. Cada período experimental teve duração de 23 dias, sendo 16 dias para adaptação à dieta e sete dias para coleta de amostras ruminais. A produção de leite foi medida diariamente duas vezes, do 15 o ao 23 o dia de cada período experimental, fazendo-se uma amostragem do leite para análises de proteína e gordura. As amostras de líquido ruminal foram coletadas manualmente, por intermédio de sonda esofágica, e filtradas em gaze. As produções de leite e leite corrigido para 4%, proteína, gordura, lactose, sólidos totais, sólidos desengordurados e densidade não foram afetados pelo aumento de lipídios na dieta e nem pelas diferentes fontes de lipídios. Houve efeito depressivo de lipídios sobre a porcentagem de butirato e consumo de MS, sendo que o óleo de soja causou maior efeito. O pH aumentou somente com a inclusão de grão de soja moído na dieta. Os níveis de acetato, propionato, A:P, isobutirato, isovalerato, amônia e atividade de produção de amônia não sofreram efeito de tratamentos.Palavras-chave: ácidos graxos voláteis, consumo, fermentação, pH, rúmen Lipids in the Ration of Dairy Cows: Ruminal Fermentation Parameters, MilkProduction and Composition ABSTRACT -The objective of this research was to evaluate two levels of lipids (3 and 7%) in the diet of milking cows, and to evaluate in the 7% lipids two lipid sources (crushed soybean and soybean oil), on milk production and composition, ruminal parameters, ammonia production by mixed ruminal bacteria and dry matter intake. Six mature Holstein cows, purebred or crossbred, 500 kg of live weight, 30 days after calving and milk production of 20 l/day, were assigned to a two 3x3 latin square. Each experimental period last 23 days, in which 16 was for adaptation and seven days for data and sampling collection. Milk production was measured twice daily, from the 15 th to the 23 rd day of each experimental period, and sampled for protein and fat analysis. Ruminal samples were collected by esophageal catheter and squeezed in cheesecloth. Milk and 4% corrected milk, protein, fat, lactose, total solids, non fatty solids and density were not affected by lipids level and source in the diet. There was a negative effect of lipids on butyrate and dry matter intake, in which soybean oil caused the major effect. The pH increased in the crushed soybean diet only. Acetate, propionate, acetate:propionate, isobutyrate, isovalerate, ammonia and specific activity of ammonia production were not affected by the diets. ., v.31, n.1, p.522-529, 2002 (suplemento) In...

show abstract

“…The syringe was then flushed twice with 2 mL of vegetal oil and the contaminated oil was given to the animals. A total of 6 mL oil was ingested by each animal, according to Murphy and Morgan (11).…”

Section: Animals Phenanthrene Administration and Samplingmentioning

confidence: 99%

Transfer of Phenanthrene and Its Hydroxylated Metabolites to Milk, Urine and Faeces

Grova

Feidt

Monteau

et al. 2008

Polycyclic Aromatic Compounds

View full text Add to dashboard Cite

Single oral ingestion of phenanthrene was administered in lactating goats with the aim of characterizing its behavior and its biotransformation in milk and other excretion products. Detection and identification of the analytes (phenanthrene, 1-, 2-, 3-, 4-, 9-hydroxyphenanthrene and 9,10-dihydroxyphenanthrene) were achieved using GC-MS procedure. The blood kinetics revealed the presence of phenanthrene and its hydroxylated forms quite soon (3-7 h) after the oral administration. The high concentration of metabolites in blood (3-300 ng/mL) suggests a very fast biotransformation process of phenanthrene. A direct link between the lipophily and the presence of the molecule in milk or urine was established. Indeed, 94% and 99.6% of the excreted phenanthrene were recovered under metabolite forms in milk and urine respectively. The non-metabolized phenanthrene was principally found in faeces. The more the solubility increased, the more the compound was transferred through milk and urine; as a consequence, the 99 9,10-diOHphenanthrene appeared mainly in urine whereas phenanthrene was practically not detectable. These results provide original information on the ability of the dairy ruminant to metabolize and to transfer phenanthrene. The extremely low rate transfer of phenanthrene and its metabolites to the milk (0.25%) should not, therefore, be considered as a major health concern.

show abstract

Effect of inclusion of protected and unprotected tallow in the supplement on the performance of lactating dairy cows

Cited by 29 publications

References 11 publications

The influence of wilting and season of silage harvest and the fat and protein concentration of the supplement on milk production and food utilization by lactating cattle

The influence of wilting and season of silage harvest and the fat and protein concentration of the supplement on milk production and food utilization by lactating cattle

Adição de Lipídios na Ração de Vacas Leiteiras: Parâmetros Fermentativos Ruminais, Produção e Composição do Leite

Transfer of Phenanthrene and Its Hydroxylated Metabolites to Milk, Urine and Faeces

Contact Info

Product

Resources

About