Effects of concentrates with different contents of protected fat rich in PUFAs on the performance lactating Granadina goats

Sampelayo, M.R. Sanz; Pérez, Luis; Alonso, Jesús; Amigo, Lourdes; Bozá, J.

doi:10.1016/s0921-4488(02)00007-x

Cited by 52 publications

(33 citation statements)

References 27 publications

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“…At 180 days in milk, the goats receiving CSFA produced nearly 3.0 kg of milk/day versus 2.0 kg/day for the control diet. These results contradict Sanz Sampelayo et al (2002b), who observed no effect on milk yield in CSFA-supplemented animals, and differ from Hosam (2011), who showed that milk yield increased only with diets containing the highest CSFA levels.…”

Section: Discussioncontrasting

confidence: 84%

“…Sanz Sampelayo et al (2002a) reported feed refusal by goats fed concentrate plus CSFA, with a negative impact on DMI. However, this problem was not encountered in the present study, nor was it observed by Teh et al (1994), who fed higher levels of CSFA (90 g/kg DM of diet) to goats.…”

Section: Discussionmentioning

confidence: 99%

“…According to Sanz Sampelayo et al (2002a), there were problems on palatability, and Sanz Sampelayo et al (2002b) observed no effect on milk yield in CSFA-supplemented animals. Teh et al (1994) observed weight loss and a reduction in milk yield with CSFA supplementation, while Hosam (2011) observed an increase in milk yield in CSFA-supplemented animals, but only with the highest energy level of supplementation (50 g/kg).…”

Section: Introductionmentioning

confidence: 98%

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Lactation curves and economic results of Saanen goats fed increasing dietary energy levels obtained by the addition of calcium salts of fatty acids

et al. 2014

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-The objective of this study was to evaluate the use of calcium salts of fatty acids (CSFA) to increase the dietary energy levels for Saanen goats and their effects on the lactation curve, dry matter intake, body weight, and economic results of the goats. Twenty multiparous goats, weighing an average of 63.5±10.3 kg, were randomly assigned to one of four treatment groups, each receiving one of the following dietary energy levels: a control diet consisting of 2.6 Mcal of metabolizable energy per kg of dry matter (Mcal ME/kg DM) or a test diet supplemented with CSFA (Lactoplus ® ) to obtain 2.7, 2.8, or 2.9 Mcal ME/kg DM. Goats were housed in individual stalls and were fed and milked twice daily. The animals were evaluated until 180 days in milk by measuring dry matter intake and milk yield. These measurements were used to calculate feed efficiencies and the cost-benefit ratio of diet and lactation curves using Wood's nonlinear model. Increasing dietary energy levels showed no effect on body weight. Supplementation with CSFA did not limit dry matter intake; however, it changed the shape of the lactation curve by promoting a late peak lactation with a longer duration. Milk yields at 180 days in milk had a quadratic increase with a maximum energy level at 2.85 Mcal ME/kg DM. Increasing the dietary energy level for Saanen goats using CSFA changes their lactation curves, with the best milk production achieved with a 2.85 Mcal ME/kg DM diet; however, the greatest economic results were obtained with a 2.7 Mcal ME/kg DM diet.

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Section: Discussioncontrasting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Lactation curves and economic results of Saanen goats fed increasing dietary energy levels obtained by the addition of calcium salts of fatty acids

et al. 2014

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“…To our knowledge, only AbuGhazaleh et al (2002) reported no changes in ECM of dairy cows supplemented with different fat sources or their blends. Sampelayo et al (2002a) showed no effect on energy yield in the milk due to fat supplementation by either 9 or 12% protected fat rich in PUFA which agrees with our result.…”

Section: Milk Production and Compositionsupporting

confidence: 92%

“…This might explain the reduced dry matter intake observed with the 5%SBO. DMI tended to decrease as fat level in the diet increased due to physiological regulation mechanism of feed intake in terms of increased energy density with rising level of fat the diet (Sampelayo et al, 2002b). The same reference pointed that the decrease in feed intake was also due to decreased palatability of the diets with oil supplementation.…”

Section: Dry Matter Intake Body Weights and Blood Metabolitesmentioning

confidence: 92%

Response of Shami goats and kids to variable levels of soyabean or sunflower oils in diets

Titi¹,

Hasan²,

Al‐Ismail³

et al. 2011

J. Anim. Feed Sci.

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A study was conducted to determine the effect of feeding soyabean or sunflower oil to lactating Shami goats on milk production, composition and fatty acid profile. Goats (n=125), 2 to 4 years of age and 55 to 60 kg liveweight, were randomly assigned to 5 treatment groups (25 each) in a completely randomized design. Diets were: a control ration (C), control supplemented with 3% soyabean oil (3%SBO), control supplemented with 5%SBO, control supplemented with 3% sunflower oil (3%SFO), and a control supplemented with 5%SFO. Variables measured were milk production, milk composition, dry matter intake, body weight, weaning weight of kids, blood metabolites, and milk and blood fatty acid profiles. Daily milk production was reduced (P<0.05) in most treatments. Fat and protein yields were maximum (P<0.05) at 3%SBO while energy corrected milk was highest (P<0.05) for the 3%SBO. Feed intake was least (P<0.05) for the 3%SFO group and feed to milk ratio was highest (P<0.05) for the 3% SBO group. Values for the serum cholesterol were highest (P<0.05) for the SBO kids. Meanwhile, triglycerides were reduced (P<0.05) following oil treatment with the lowest (P<0.05) value in the serum of the 5%SBO kids. Total conjugated linoliec acid (CLA) content in milk was mostly increased (P<0.05) for oil treated goats. In the blood of kids, total CLA was maximum (P<0.05) for kids of the 5%SFO group.Results indicate that supplementing lactating goat diet with either oils did not improve milk production, milk composition, or growth rate and weaning weight of their kids, but improved their energy corrected milk and CLA content. However, only SBO increased cholesterol level in the blood in kids.

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Bioactive Components in Goat Milk

Park

2009

Bioactive Components in Milk and Dairy Products

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Effects of concentrates with different contents of protected fat rich in PUFAs on the performance lactating Granadina goats

Cited by 52 publications

References 27 publications

Lactation curves and economic results of Saanen goats fed increasing dietary energy levels obtained by the addition of calcium salts of fatty acids

Lactation curves and economic results of Saanen goats fed increasing dietary energy levels obtained by the addition of calcium salts of fatty acids

Response of Shami goats and kids to variable levels of soyabean or sunflower oils in diets

Bioactive Components in Goat Milk

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