Tuesday, February 16, 2016

Lactation, weather found to predict milk quality in dairy cows.

The quality of colostrum -- the nutrient-rich milk newborn dairy calves first drink from their mothers -- can be predicted by the mother's previous lactation performance and weather, according to new research Colostrum is a concentrated source of nutrients, which includes fats, proteins, including immunoglobulins such as Immunoglobulin G (IgG), carbohydrates, vitamins, and minerals. It is key in supporting the health of the young dairy animal. Previous research has found that inadequate feeding of quality colostrum to newborn calves can result in reduced growth rates, increased risk of disease and death, increased risk of being culled, and decreased milk production in the first and second lactations. UNH researchers found that previous lactation performance data can predict colostrum quality; the more lactations the cow has had in the past, the higher the quality of colostrum in the future. This method allows dairy producers to predict colostrum quality before the calf is born and the ability to estimate Immunoglobulin G content, which is the primary measure of colostrum quality, of the colostrum without having to collect it. The long-term effects of colostrum determine the success of the cow, and therefore special care should be taken to ensure colostrum of the highest quality is provided to the newborn calf.Researchers also found that the poorest quality colostrum was produced during the winter. The researchers theorize that in warmer temperatures, the blood vessels of the cow dilate, causing them to be more permeable to IgG. This increased permeability of the blood vessels may lead to improved colostrum.It is apparent from these studies that environmental temperature or day length has an impact on colostrum quality . culled from papers from university of Hampshire

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