Under the condition of intensive pig raising, pigs eat mixed (mixed) feeds such as corn, soybean meal and fish meal. The dietary diet that has become increasingly “precise” has a very low crude fiber content, which leads to digestive dysfunction, constipation and other “rich diseases” in pigs, which affects the improvement of pig-raising efficiency. In fact, letting pigs eat “coarse” grain and maintaining suitable crude fiber content in the diet are particularly effective in reducing the cost of raising the pig and increasing the production performance of the pig.
Maintaining appropriate crude fiber content in a live pig diet can produce the following effects: First, regulate nutrient levels. After the dietary fiber enters the gastrointestinal tract, its volume expansion increases, which can expand the gastrointestinal volume, so that the pig can endure hunger. At the same time, crude fiber can dilute the concentration of nutrients such as energy and protein to achieve the rational use of feed; second, it reduces the cost of feed. In order to increase the crude fiber content of the feed diet, it is possible to partially replace the feed raw material with a lower crude fiber content but with a higher price by using a feed material with a higher crude fiber content but a lower price, so that the unit feed can be obtained with the same output. The cost is reduced; the third is to stimulate gastrointestinal motility. After the crude fiber enters the gastrointestinal tract, it can stimulate gastrointestinal motility, facilitate the absorption of nutrients in the gastrointestinal tract, promote the normal excretion of feces, reduce the occurrence of gastrointestinal ulcers, and control fat deposition. Increasing crude fiber in feed can reduce serum total and low-density lipoprotein levels, which can effectively regulate fat metabolism and control the deposition of fat in pigs. Fifth, it promotes pig health. The soluble part of the dietary fiber plays an important role in reducing the secretion of gastric acid in pigs, and has a very strict role in the colonization of pathogenic bacteria in the intestine, thus limiting the growth of pathogenic bacteria in the intestine and promoting the health of animals. Sixth, improving the reproductive performance of sows . Addition of cellulose to the diet of pregnant sows can increase reproductive performance of sows. On average, each sow produces 1.5 more piglets. The growth rate of piglets produced by the piglets produced is lower than that of sows fed with fiber. 20%.
Of course, high dietary fiber content can also have an adverse effect on the growth and development of pigs, and only the right amount of supply can produce optimal results. At the same time, different physiological stages of pigs have different digestibility of cellulose. According to different physiological stages and physiological characteristics of pigs, appropriate proportions should be added to the diet. The crude fiber content of the pigs at different physiological stages is recommended as follows: boars, 6-8%; empty pregnant and pregnant sows, 8-12%; lactating sows, 7%; reserve pigs, 6.5-8%; weaned piglets, 3~4%; finishing pigs, 6~7%.
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