The effect of high fiber diet on the performance of sows
The crude fiber also includes a mixture of components such as cellulose, hemicellulose, and lignin instead of a single cellulose. The content of crude fiber in feed has a great influence on the growth of pigs. Therefore, in real life, we often need to determine the content of crude fiber in feed to determine the type of feed. The traditional way to measure crude fiber is to digest the sample with dilute acid and dilute alkali. The remaining components are crude fiber. This method is consistent in use today, and the fiber measurer or also called the crude fiber measurer uses this principle. Research and development. The method of quantitative determination of cellulose based on the solubility of Vansoest, that is, the neutral detergent (the main component is usually sodium lauryl sulfate), the acidic detergent (the main component is cetyl trimethyl ammonium bromide) The digestion of the sample and the direct determination of neutral detergent fibers, acidic detergent fibers and pickled lignin content have gradually been replaced. As a result of the study, the crude fiber content determined by this method was significantly different from the crude fiber content measured by a fiber meter. Therefore, in the determination of specific crude fiber, we must choose according to the specific circumstances.
Adding crude fiber to pig feed can reduce dietary digestive energy concentrations. In order to maintain DE food intake, pigs usually increase feed intake for this feed. However, when the crude fiber content in the diet exceeds 10% to 15%, the feed intake is reduced due to excessive volume or reduced palatability. At low temperatures, sows can increase feed intake so that low-energy (high-fiber) diets can maintain the pig's gestation and lactation needs to the same effect as high-energy diets, but at high temperatures, due to With feed intake limitations, low energy (high fiber) diets are generally difficult to meet for pregnancy and lactation needs. High-fiber diets increase heat stress. If sows are fed high-fiber diets in the summer, they will increase body heat and cause heat stress. In particular, sows in late pregnancy often suffer from wheezing, restlessness, anorexia, and fever due to heat stress, resulting in non-inflammatory breast edema, which is often overlooked by non-dairy, lactating, and pig farmers. The excessive content of crude fiber in the feed will affect the absorption and utilization of nutrients.
The speed of fiber feed through the gastrointestinal tract will be accelerated, resulting in reduced absorption and utilization of nutrients and poor feed efficiency. If the content of crude fiber in the feed is high, the phytic acid, oxalate, and citrates contained in the feed will form insoluble complexes with the minerals, which will affect the utilization of calcium and phosphorus. The sows themselves have a high demand for calcium and phosphorus. If the amount of crude fiber is too high, the absorption and utilization of calcium and phosphorus will affect the sow's malnutrition, abnormal lactation, and weakness of the sow hindlimb after weaning. If the content of crude fiber is too high, other nutrients in the feed will be relatively reduced, and the amount of single raw materials must be greatly increased, which is also inconsistent with economic principles.
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