?????? ???????? ??? ?????? ? ??????? ???????? ? ????????? ??????? | Crude cellulose or fiber in animal food - practical access
2019
?????????, ?????? | ????????, ??????? | ?????, ?????? | Mirilovi?, Milorad
Although there are a numerous methods, informations about the nutrient composition we use today are obtained by the use of the so-called Weende method. This classic procedure, developed more than 150 years ago, has remained the basis even with the most uptodate instrumental analytics on modern devices. However, Weende procedure can provide only raw values, because analytical procedure is not capable to extract pure substances, which are associated with the accompanying substances of feed. The major inaccuracies in the application of this procedure are related to the carbohydrate content, primarily crude cellulose, which includes a number of other feed ingredients under this term. This was the reason for the development of numerous modifications and alternatives, where the Van Soest model found its greatest use. The main objective of this model is based on the separation of highly digestible, non structural, cellular components (starch, sugars, protein, pectins and fat), which are the main energy source, from the structural components of the cell wall of the plant cell (cellulose, hemicellulose and lignin), which represent less digestible, fibrous part. The fibrous part is further separated into two components, NDF and ADF fibers, whose values indicate the possibility of feed consumption and its energy value, primarily in ruminant nutrition. Current trends in animal nutrition indicate the importance of these fibers in the diet of monogastric animals.
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