Effects of Feeding Protected Tallow to Dairy Cows in Early Lactation

Smith, Nathan R.; Dunkley, W.L.; Franke, A.A.

doi:10.3168/jds.s0022-0302(78)83643-1

Cited by 84 publications

(34 citation statements)

References 26 publications

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“…The increase in plasma cholesterol and phospholipids with calcium salt supplementation, especially in mid-lactation, is consistent with the general effect of lipids (for example, Sharma et al, 1978;Smith et al, 1978;Gagliostro et al, 1991 (Chilliard, 1993) (Michalet-Doreau and Sauvant, 1989), and milk synthesis does not depend to a large extent on the equilibrium between the endproducts of digestion (Sutton, 1989 (Casper et al, 1990) or calcium salts (Klusmeyer et al, 1989b (Romsos et al, 1981) and mares (Doreau et al, 1992a). However, a negative effect of lipid supplementation on milk lactose has already been shown in cows (Pan et al, 1972;MacLeod et al, 1977;Chilliard and Doreau, unpublished …”

supporting

confidence: 66%

Effects of calcium salt supplementation on dairy cow performances in early lactation. Influence of the nature of concentrates

Elmeddah¹,

Doreau²,

Rouel³

et al. 1994

Ann. Zootech.

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Summary — Two feeding trials were carried out on dairy cows for the first 12 weeks of lactation. Diets were based on grass silage and ensiled beet pulps and distinguished by the nature of concentrates: rich in starch (S), starch + lipids (SL), and fibre + lipids (FLi ) for trial 1; fibre (F) and fibre + lipids (FL2) in trial 2. The lipid supplement used was calcium salts of palm oil fatty acids. Lipid-supplemented diets contained ca 6% fatty acids in dry matter. Results were analysed for the first 6 weeks of lactation (period 1) then for the following 6 weeks (period 2). Whatever the basal diet, calcium salt supply did not modify milk yield (30.7 and 29.6 kg on average for trials 1 and 2, respectively). In trial 1, lipid supply did not modify protein content during weeks 1-6 but decreased it during weeks 7-12 (31.5, 32.1 and 31.4 g/kg during weeks 1-6, 28.8, 27.2 and 26.4 g/kg during weeks 7-12 for diets S, SL and FL1, respectively). Although non-significant, the same trends were observed in trial 2 (31.4 and 30.7 g/kg during weeks 1-6, 29.4 and 27.5 g/kg during weeks 7-12 for diets F and FL2, respectively). In trial 1, during weeks 7-12, lactose content was lower for diet FL1 than for diet SL (48.0 vs 49.4 g/kg). For the 2 trials and the 2 periods, butterfat content did not vary (45.2, 47.4, 45.2, 44.6, 47.0 g/kg during weeks 1-6, 40.5, 40.4, 38.2, 38.1, 39.0 g/kg during weeks 7-12 for diets S, SL, FL1, F and FL2, respectively). Lipid supply decreased the proportion of short-and medium-chain fatty acids (6-14 carbons) in both trials and both periods, increased C16:0 in both trials during weeks 1-6 only, and did not modify C18:0 and increased C18:1 during the 2 periods in trial 1 and during weeks 7-12 in trial 2. No difference in proportion of these fatty acids was observed between diets SL and FLi.

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supporting

confidence: 66%

Effects of calcium salt supplementation on dairy cow performances in early lactation. Influence of the nature of concentrates

Elmeddah¹,

Doreau²,

Rouel³

et al. 1994

Ann. Zootech.

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“…The decreased milk protein percentage with the oil supplemented diets may be attributed to a combination of factors [31]: (i) the dilution effect due to the higher amount of milk produced per day; (ii) the reduction of microbial protein synthesis with lower dry matter intakes; (iii) changes in the carbohydrate metabolism towards a lower mammary uptake of glucose, as suggested by Smith et al [43]. Since milk yield was significantly enhanced by oil supplementation in our experiment, the dilution effect may be accounted for to explain the lower protein content.…”

Section: Discussionmentioning

confidence: 83%

Effect of forage/concentrate ratio and soybean oil supplementation on milk yield, and composition from Sarda ewes

et al. 2006

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“…Decreases in milk protein content when calcium soap is included in the diet have been reported in ewes (Casals et al, 1999;Horton et al, 1992;Rossi et al, 1991;Kovessy et al, 1987), cows (Kowalski et al, 1999;Chilliard et al, 1993), but not in goats (Baldi et al, 1992). The decreased milk protein concentration with fat supplementation may be related to a combination of factors such as: i) dilution effects, when milk yield was increased; ii) reduction of microbial protein synthesis, when dry matter intake (DMI) was depressed (Palmquist and Jenkins, 1980); or changes in glucose metabolism, as suggested by Smith et al (1978). In our experiment, neither milk yield nor DMI varied, thus our results seem …”

Section: Resultsmentioning

confidence: 99%

Olive oil calcium soaps and rumen protected methionine in the diet of lactating ewes: effect on milk quality

Antongiovanni¹,

Secchiari²,

Mele³

et al. 2002

Italian Journal of Animal Science

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Eight Massese ewes were fed 4 diets with alfalfa hay as the forage (73% on the DM basis): 1) control diet (C); 2) diet C supplemented with olive oil calcium soaps, 50 g/d (L); 3) diet C supplemented with protected methionine, 5 g/d (M) or 4) plus both soaps and methionine (ML); the experimenthal design was a 4x4 Latin square with 2 replicates per diet. During the experimental periods, lasting one week each, the ewes were milked twice daily (8:00 a.m. and 7:00 p.m.). Milk yield was not affected by diet quality, but milk fat percentage and 6.5% fat corrected milk yield were higher in diets L, M and ML with respect to diet C (P<0.05). Milk protein content was depressed and blood urea increased following the Ca soap diet alone or with protected methionine. Diet M worsened (P<0.05) Rennet clotting time (r) and curd firmness after 30 minutes (A30). Saturated fatty acids C10:0, C12:0, C14:0 and C16:0 were depressed in milk fat with the Ca soap supplemented diet, some of them significantly. C18:1 increased (P<0.05) with diet L only, whereas the association of Ca salts and methionine in diet ML significantly affected the linoleic acid and CLA content. It is concluded that the use of olive oil fatty acids as a protected fat source seems to improve the milk fatty acid characteristics towards a safer pattern, but the presence of this type of Ca salts in the diet appears to worsen the metabolic utilisation of amino acids.Key words: Ewe milk, Olive oil calcium salts, Protected methionine, Fatty acids. RIASSUNTO SAPONI DI CALCIO DELL'OLIO D'OLIVA E METIONINA RUMINO-PROTETTA NELLA DIETA DI PECORE IN LATTAZIONE: EFFETTI SULLA QUALITÀ DEL LATTE Otto pecore di razza Massese sono state alimentate, utilizzando un disegno sperimentale a quadrato latino 4x4 con due replicazioni per cella, con quattro diete a base di fieno di erba medica (73% della s.s.) e mangime concentrato: 1) dieta controllo (C); 2) dieta C integrata con 50 g/d di saponi di calcio dell'olio d'oliva (L); 3) dieta C integrata con 5 g/d di metionina protetta (M); 4) dieta C integrata con 50 g/d di saponi di calcio dell'olio d'oliva e 5 g/d di metionina protetta (ML). La produzione di latte non è stata influenzata dalla dieta

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Effects of Feeding Protected Tallow to Dairy Cows in Early Lactation

Cited by 84 publications

References 26 publications

Effects of calcium salt supplementation on dairy cow performances in early lactation. Influence of the nature of concentrates

Effects of calcium salt supplementation on dairy cow performances in early lactation. Influence of the nature of concentrates

Effect of forage/concentrate ratio and soybean oil supplementation on milk yield, and composition from Sarda ewes

Olive oil calcium soaps and rumen protected methionine in the diet of lactating ewes: effect on milk quality

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