Fat Content Of Colostrum Research Articles

Effects of induced or delayed parturition and supplemental dietary fat on colostrum and milk composition in sows2

Two experiments were conducted to evaluate the effects of inducing premature parturition on the composition of colostrum and milk and the effects of dietary fat supplementation on colostrum and milk composition from premature and delayed farrowing sows. In Trial 1, eight sows were allowed to farrow naturally (d 114, NF sows) and eight sows were induced to farrow (IF sows) prematurely by injection of prostaglandin F2 alpha on d 112 of gestation. Average fat content of sow's milk during the first 12 h postpartum was lower for IF than for NF sows (P < .05), as was overall mean fat percentage (P < .05). In Trial 2, 53 sows were randomly assigned in a 2 (diets) x 5 (parturition treatments) factorial experiment. Dietary treatments fed during the last 2 wk of gestation and throughout lactation were control diet and added fat diet (control diet plus 10% corn oil). Parturition treatments included 1) natural farrowing (d 114), induction of parturition with prostaglandin F2 alpha on 2) d 110, 3) d 111, or 4) d 112 of gestation, and 5) delay of parturition with progesterone followed by injection of prostaglandin on d 115. The added fat diet increased milk fat percentage compared with the control diet (P < .01). Colostral fat percentage was reduced by induction of premature farrowing (d 110 or 111) in sows fed the control diet but was unaffected in sows fed added dietary fat (interaction, P < .05). Mean fat content of colostrum was not reduced in groups receiving the added fat diet that were induced to farrow prematurely.(ABSTRACT TRUNCATED AT 250 WORDS)

Effect of colostral fat level on fat deposition and plasma metabolites in the newborn pig.

The effects of colostral fat level on fat deposition and plasma concentrations of glucose, insulin, and free fatty acids (FFA) were determined in 28 newborn pigs during the first postnatal day. Soon after birth, pigs were allotted to four treatments groups. Group 1 was killed at birth. The remaining pigs were fed intragastrically sow colostrum that contained high (10.2%; HFC), normal (4.8%; NFC) or low (1.0%; LFC) levels of total fat at the rate of 15 to 18 g/kg birth weight at 65- to 70-min intervals. A total of 21 feedings was provided and pigs were killed 1 h after the last feeding. Body fat deposition increased linearly (P less than .01) with the amount of ingested fat by .32 (+/- .04) g per 1-g increase in fat intake. Fatty acid composition of the pigs changed toward that of the colostrum with increased fat in colostrum. More liver glycogen was lost (P less than .01) in pigs given LFC. Plasma concentrations of glucose and insulin were similar in pigs fed HFC and NFC. After the 11th feeding (14 h postnatal), LFC resulted in lower plasma glucose concentrations (P less than .05) than HFC or NFC. Plasma insulin concentrations also were lower in pigs fed LFC. Plasma FFA concentrations remained unchanged in pigs fed LFC but increased with both fat content in colostrum (P less than .05) and time (P less than .05) in the other two groups. Colostral fat plays a major role in the supply of energy and in glucose homeostasis in the neonatal pig.

The Effect on Late Pregnancy Feed Allowance on the Composition of the Sow’s Colostrum and Milk

The composition of colostrum and milk and of sows fed either 3.4 kg or 1.0 kg daily of a conventional sow diet during the last 14 days of gestation was investigated. The fat content of colostrum of the very restrictedly fed sows was higher compared with the standard fed sows. There was a significantly decrease in the crude protein and immunoglobulin contents of colostrum during the first 4 h post farrowing. The milk composition 14 days after farrowing was not affected by the late pregnancy feeding level. The composition of milk was significantly correlated with the 3 week litter weight. The colostrum IgG content was not correlated to the mortality of piglets during the first week post favouring. The content of crude protein and immunoglobulins in the milk was not correlated with the frequency of post weaning diarrhoea.

Effects of dietary horse beans ( Vicia faba) on colostrum and milk composition and milk yield in sows

In an experiment sows received 0, 17 and 34% horse beans in the diet. Horse beans replaced the protein mixture (soybean meal, fishmeal, and meat and bone meal) by one half or in full. The composition of colostrum was altered by the dietary horse beans. An increase in dietary horse beans significantly reduced dry matter contents ( P ≤ 0.05) and protein contents ( P ≤ 0.001). As to the various protein fractions, total whey protein and albumin showed the greatest decline ( P ≤ 0.001), followed by immunoglobulin ( P ≤ 0.01) and beta lactoglobulins ( P ≤ 0.05). Casein and alpha lactalbumin contents were not altered significantly. The total fat content of colostrum was not influenced by dietary horse beans, but the percentages of C 18:1 increased ( P ≤ 0.001) and C 18:2 decreased ( P ≤ 0.001) with increasing amounts of horse beans in the diet. The effect of horse beans on the composition of sow milk was insignificant, although there was a tendency to higher dry matter and protein content in milk from sows fed diets without horse beans. Horse beans at both levels had a negative effect on milk yield (linear trend: P ≤ 0.05).