Effects of varying levels of protected fat on performance of Shami goats during early and mid lactation (original) (raw)
Related papers
This study was conducted to determine the responses of early lactating Shami goats to varying amounts of dietary supplementation of Ca salts of fatty acids. Shami goats (n = 75) in their first week of lactation were randomly assigned to 3 isonitrogenous dietary (TMR) treatments containing 0%, 3%, or 5% added Ca salt. The study took 60 days during which the following variables were measured: milk production and composition, body weight, feed intake, serum cholesterol and triglyceride, kids weaning weight, and milk fatty acids. Milk production and energy corrected milk were higher (P< 0.05) at 5% level. Percentages of milk composition were higher (P <0.05) at 3% with CP% not different from 5%. No differences were observed in yields of different milk components including casein, final body weights, feed intake, or weaning weights of kids. Intake of metabolizable energy was higher (P < 0.05) at 5% level of Ca salts. Differences in milk fatty acids were mainly restricted to unsaturated ones with no effect on the saturated fatty acids. Such results suggest that milk production and content of lactating Shami goat can be changed by a level of 5% of Ca salts.
Inclusion of Protected Fat in Diets on the Milk Production and Composition of Saanen Goats
Ciência e Agrotecnologia, 2015
According on the fat source included in the diets for goats, the milk production can be increased and milk fatty acid composition can be improved. This study was conducted to evaluate the inclusion of protected fat (CSFA - calcium salts of fatty acids) in the diets of lactating Saanen goats on milk production and composition. Five Saanen goats (63.23 ± 9.08 kg body weight and 105 ± 3 days of lactation) were distributed in a Latin square design (5 × 5) with five diets: control (without the addition of CSFA) and the other diets with: 6.25, 12.50, 18.75 and 25.0 g CSFA per kg dry matter (g/kg DM), respectively. Dry matter intake (DMI) and milk production (MP) were evaluated. Milk samples were collected to determine milk composition and fatty acid profile. Feed efficiency (FE) was estimated. The supplementation of CSFA up to 25 g/kg DM did not influence the DMI, MP and FE. Milk components production (g/d) was not influenced by the inclusion CSFA in the diet; however, there was a linear ...
Revista Brasileira de Zootecnia, 2014
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.
Malaysian Journal of Animal Science, 2018
Milk is one of the essential products in the human diet, rich in nutritive components. The inter-specific differences of goat and cow milk composition clearly show that goat milk is rich in beneficial fatty acids content. The composition and fatty acids of milk is affected by various factors including stage of lactation. Thus, the objectives of this study were to evaluate milk composition (fat, protein, lactose and total solid) and fatty acid profiles at different stages of lactation in the dairy goats. Milk yield and samples were obtained from 33 lactating Jamnapari crossbred goats, aged between 2 and 4 y, from a dairy goat farm. Does were fed with the same diet (cut fodder and soy wastes) throughout the lactation period. Milk samples were taken from each goat on 10-15, 42-63 and 98-112 d postpartum and named as early, mid, and late lactation stage, respectively. Milk samples were analysed to determine milk composition and fatty acids profile. Results revealed that milk yield was the highest (P<0.05) during mid-lactation (785 mL) and consequently low in fat (F) and total solid (TS) content. The milk yields were higher (P<0.05) in F and TS content at early (5.10% F; 14.65% TS) and late (4.56% F; 14.71% TS) lactation stages. The protein (3.57%) and lactose (5.29%) content remained unchanged (P>0.05) throughout this study. Low level of cholesterol-raising fatty acids in human nutrition known as myristic and palmatic acids were detected at early lactation stages (P<0.05) compared to mid and late lactation stages. However, the value of individual medium-chain triglycerides in particularly caproic and caprylic acids were also at low value (P<0.05) during early lactation stage. Oleic acid had a higher value at the beginning of lactation (P<0.05) until the mid-stage of lactation. The fat content which coincided with oleic acid was concentrated during early lactation stages with the expense of caproic and caprylic acids which were also beneficial in human nutrition. In conclusion, milk yield, composition and fatty acid profiles of Jamnapari goats were altered by the stage of lactation. Low levels of individual MCT, especially caprylic and capric acids, and including myristic and palmatic acids (long chain fatty acid) in goat milk during the early stage of lactation. The highest value of rumenic acid and the decrease in stearic and oleic acid levels in goat milk occurred during mid-stage of lactation.
Small Ruminant Research, 2015
Feeding rumen-inert fat, such as calcium salts of fatty acids (CSFA), has dual benefits as it increases milk yield and improves the fat composition in milk. However, there is a shortage of information on the effect of CSFA on milk yield and composition in grassland Saanen goats. Thus, this study aimed to evaluate the effects of CSFA in the concentrate of lactating grassland Saanen goats on milk yield, composition, quality, and fatty acid composition and to determine the best response to the addition of CSFA. Five multiparous Saanen goats (five years old) were distributed in a 5 × 5 Latin square design with five treatments (0%, 1.5%, 3.0%, 4.5% and 6.0% CSFA), and four primiparous Saanen goats (three years old) were distributed in a 4 × 4 Latin square design with four treatments (0%, 1.5%, 3.0% and 4.5% of CSFA); the goats had an average of 78 ± 10 days in lactation at the start of the experiment. Each period lasted 21 days, including 14 days for adaptation and seven days for data collection. Pelleted concentrate was composed of ground corn, soybean meal, a mineral-vitamin supplement for goats, salt and CSFA at the levels of inclusion. For grazing goats, an area with Stargrass (Cynodon nlemfuensis) was used. The addition of CSFA to the concentrate of grassland Saanen goats had no effect on milk yield, milk components such as fat, protein, lactose and totals solids, or milk quality (acidity and somatic cell counts) in multiparous or primiparous goats. However, the concentration of fatty acids was modified. The concentration of capric (10:0) and myristic (14:0) fatty acids decreased linearly with increased inclusion of CSFA in the concentrate. There was a quadratic effect on medium-chain and long-chain fatty acids and omega-3 (n-3) in the milk of multiparous Saanen goats following treatment. The inclusion of CSFA in the diet of primiparous goats had a positive linear effect for linoleic fatty acid (18:2 n6c), conjugated linoleic acid, omega-6 (n-6) and polyunsaturated fatty acids, whereas the concentration of medium-chain fatty acids showed a negative linear effect. In conclusion, CSFA in the concentrate of grassland primiparous goats showed positive responses on the fatty acid composition of goat milk, increasing the polyunsaturated fatty acid concentration.
Ciência e Agrotecnologia, 2014
Peripartum is a critical period for dairy goats, as dry matter intake (DMI) is not enough to supply the energy requirement for foetal growth and subsequent lactation. The objective of this study was to evaluate the use of calcium salts of fatty acids (CSFA) to increase dietary energy level of peripartum dairy goats and its effects on nutritive value of diets and milk quality. Twenty multiparous Saanen goats (body weight 63.5±10.3 kg) were distributed in a completely randomised design in four treatments at the following dietary energy levels: 2.6 Mcal of metabolisable energy per kg of dry matter (Mcal ME/kg DM) -control diet; and 2.7, 2.8, and 2.9 Mcal/kg DM -with added CSFA. Goats were housed in individual stalls and evaluated in the peripartum period, by measuring body weight (BW), DMI, dry matter and nutrient digestibility of diets, blood composition, and milk quality and yield. Increasing dietary energy level to 2.9 Mcal ME/kg DM had no effect on BW and did not limit DMI. CSFA supplementation increased intake of total digestible nutrients and did not affect fibre digestion. Blood triglycerides and cholesterol concentration increased with CSFA addition. The treatments had no effect on milk yield and composition; however, CSFA supplementation changed the fatty acid concentration of milk fat, increasing levels of polyunsaturated and essential fatty acids. In conclusion, peripartum dairy goats supplemented with CSFA to increase dietary energy level up to 2.9 Mcal ME/kg DM had a greater supply of total digestible nutrients and showed altered fatty acid concentration of milk fat.
The variation in milk composition of dairy goats due to n-3 unsaturated fatty acids supplementation
2020
The objective of this research was to determine the effect of addition of n-3 unsaturated fatty acids (α-linoleic, eicosapentaenoic and docosahexaenoic) in dairy goats' ration on milk composition (fat and protein content). Also, the persistence of the effect after supplementation was analysed. The research was conducted on dairy goats (Alpine and Saanen) bred at an indoor farm. Regarding the experimental period, the milk sampling at milking (morning and evening) was performed in the period before supplementation (BS), during supplementation (S), and after supplementation (AS). According to the added supplement, animals were randomly allocated into a group (G-4) with no added supplement and three test groups (G-1; G-2; G-3) where a supplement containing n-3 unsaturated fatty acid was added over a period of five days. The results of this research indicate that the addition of PUFA in goats' ration changes the milk composition. The supplementation of α-linoleic resulted in increase of both milk fat and protein content. Furthermore, the addition of eicosapentaenoic and docosahexaenoic resulted in decrease of fat but increase of protein content in milk. The observed trends also persisted after the supplementation period.
Tropical Animal Health and Production, 2014
The objective of this study was to evaluate the effect of feeding Saanen goat kids with calcium salts of fatty acids (CSFA) in diet, on intake, performance, digestibility of nutrients, and blood parameters. Twenty-eight uncastrated male goat kids, with round average age to 112.86±4.81 days and an average body weight (BW) of 19.54±2.76 kg, were distributed in a completely randomized design distributed into four groups with seven animals per group: one control group fed a diet containing 2.5 Mcal metabolizable energy (ME)/kg dry matter (DM) and three groups fed a diet containing 2.6, 2.7, or 2.8 Mcal ME/kg DM, with CSFA added to increase the energy levels. The animals were fed the diets until they reached an average BW of 28 kg. There was hardly any apparent effect of dietary CSFA on intake of DM and organic matter (OM). The digestibility of DM and OM showed an improvement with 2.64 and 2.65 Mcal ME/kg DM in the diet. The diets containing CSFA improved average daily gain and reduced the time on the feedlot to 30 days fed diet with 2.8 Mcal ME/kg DM. However, lipid supplementation increased serum cholesterol levels. Thus, CSFA can be used to increase the energy density of the diet in finisher Saanen goat kids and improve performance by reducing days on feedlot.
Journal of Tropical Resources and Sustainable Science (JTRSS), 2019
Milk production of dairy goats raised by smallholders in Malaysia are usually very low with which are mainly attributed to poor nutrition. This study was aimed at evaluating the benefits of supplementing commercial fatty acids, organic acids and chelated minerals for enhancing milk production. Eighty Saanen dairy goats in the stage of mid-lactation were selected from 8 smallholder farms in Kelantan, Malaysia to evaluate their blood profile and mineral status in relation to their daily rations. Based on estimated dry matter intake (DMI), 50% of the animals were found not adequately fed, with deficit of 6% - 12% from the targeted DMI. Initial screening of the blood revealed that red blood cell (RBC), haemoglobin (HGB), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC) values were marginally low while sodium (Na) was deficient. Based on these findings, 6 groups of 10 Saanen dairy goats from 6 farms were selected from the above 8 farms for the seco...
Effects of Breed and Stage of Lactation on Milk Fatty Acid Composition of Italian Goat Breeds
Animals, 2019
Fatty acid (FA) profile plays an important role on human health and on sensory quality of dairy products. There is few information about breed influence on milk FA profile of local goat breeds. This study aimed to characterize and compare the milk FA profile of 5 local endangered goat breeds (Garganica, Girgentana, Jonica, Maltese, and Mediterranean Red) and a cosmopolitan breed (Saanen) reared in the same farm during a complete lactation. A total of 252 milk samples were collected monthly from 42 goats (7 goats per breed) and analyzed for gross composition and FA profile. Individual FA was determined using gas-chromatography. Data were analyzed using a mixed model with repeated measures with breed and week of lactation as fixed effects. Results showed that the FA profile was significantly affected by week of lactation and only few FA by breed effect (p < 0.05). Overall, the main differences were found between Saanen and local breeds. This study contributed to the characterizatio...