In the case of pig breeding, increasing feed intake can maximize the meat production and meat quality. When feeding, we should find ways to improve the palatability of the feed, so that the pigs are willing and active to feed and increase feed intake.
The use of flavor studies has shown that pigs have a very significant preference for sweets, and complex sweeteners (containing 6.7% sodium saccharin and other long-acting flavor enhancers and synergists) can increase feed intake in piglets, but the level of addition is too high. Or too low is not conducive to the pig's feed intake, in the piglet growth stage (1 ~ 28 days), the diet added 150mg / kg of complex sweetener can reach the maximum daily feed intake, but also can get this stage The maximum daily gain. In addition, there are experiments to prove that the fragrance has anti-oxidation function, and the fragrance can effectively alleviate the oxidation degree of the feed as the feed storage time is prolonged.
The anti-mold and anti-oxidation of feed can take the following measures to prevent mildew and anti-oxidation: (1) The moisture content of the feed should be controlled within a certain range, generally not more than 12%, and the ventilation, heat insulation and moisture-proof of the warehouse should be in place. Relative humidity is controlled below 60%. Humidity will cause mold growth, and it is not conducive to the preservation of high-fat feed. (2) The optimum temperature for mold growth is 28-38 °C, so it is necessary to control the temperature of the warehouse to prevent it. Mildew, highly unsaturated fatty acids in feeds are also susceptible to oxidative rancidity at higher temperatures. (3) Reasonably use some mildew powder and antioxidants to deal with some emergency feeds and rancidity, but this will affect the nutritional value of the feed, so it is not recommended for long-term use.
Reasonable processing It has been reported that the utilization of feed can be increased by about 23% by reconstituting the comminuted grain feed into pelletized feed. During the granulation process, the feed undergoes high pressure squeezing during steam treatment and pressing, which causes the feed grain cells to rupture and release intracellular substances to increase the nutrient content of the feed. At the same time, after the feed is made into granules, the palatability is good, the energy consumption is reduced when eating, and the feed can be made more uniform, and the pig can be prevented from picking certain feed ingredients for eating.
Elimination of anti-nutritional factors Anti-nutritional factors are the main factors that restrict feed utilization. In order to reduce or eliminate the effects of anti-nutritional factors, a variety of approaches can be taken. The main treatment methods include physical treatment, chemical treatment, breeding new varieties and biological treatment. Most anti-nutritional factors are thermally unstable, such as various protease inhibitors, lectins, anti-vitamins, etc., which can be denatured by heating.
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