Reasons for decline in fattening pigs
I. Palatability of feed
1. Dry and wet issues There are three types of feeds for pigs, namely: dry powder, wet mixes [water: feed 1:1], and thinners. According to experiments, wet feed feeds are the best, and thinner feeds are the worst.
2. The particle size of the crushed granularity corn is better than 0.8mm-1.5mm. If it is too coarse, the utilization rate of the feed will be reduced, resulting in waste. If it is too fine, it may cause gastrointestinal ulcers for a long time, which is not conducive to health, and at the same time the material is too fine. Palatability also drops, which affects feed intake.
3. Crude fiber content level If the crude fiber content in the feed is greater than 6%, the feed intake of the pig is reduced.
4. The salt requirement for normal growing pigs is 0.45%. If the salt content is reduced from 0.45% to 0.2%, the feed intake of pigs can be reduced by 20% and the weight gain can also be reduced by 38%.
5. Sweeteners The taste of pigs is very advanced. The number of taste buds in the tongue is three times higher than that of humans. Pigs prefer the sweet taste. If the feed contains sweeteners, the feed intake rises.
2. Changes in feed odor can also affect pigs' olfactory olfactory development in feed pigs, so they are very sensitive to feed odor changes and affect feed intake.
1. Changes in flavoring agents such as the conversion of frankincense, fish-flesh, and sweet-smelling, or exposure to air for too long, will make the odor volatile and lightening, which will affect their intake.
2. The feed moldy and degenerate If the feed is contaminated by mold, the moldy taste of the feed mold will occur, and both the odor and palatability will reduce the pig's feed intake.
3. Feed rancidity High ambient temperature or long feed storage time, the crude fat in the feed will be oxidized and rancid, appearing what we commonly call hazel taste, causing its feed intake to decrease.
4. Different types of oils and fats If you add soy oil, corn oil, etc. to your feed, the odor will be different. If it changes, it will affect the feed intake.
5. The influence of special odors of other raw materials on the feed such as the content of fishmeal and the quality of the fish meal.
III. Some feed ingredients directly affect the physiological response of pigs and reduce feed intake
1. Amino acid deficiency or imbalance in feed amino acids has a greater impact on pig feed intake. Experiments have shown that the feed intake of pigs increases with the increase of lysine levels in the feed, but feed intake tends to decrease after a certain degree.
2. Minerals The lack of zinc and phosphorus in the feed and the excess of calcium, manganese, iodine, and iron can all result in poor appetite.
3. The deficiency of vitamins VB1, VB2, VB12 and niacin and pantothenic acid will reduce the feed intake of piglets. If VB1 is insufficient, it will affect the TCA cycle in pigs, causing a large accumulation of propionic acid in the body and impairing digestion. System, affecting appetite.
4. A large number of antibiotic tests have shown that adding a small amount of antibiotics to the pig diet can increase pig feed intake by 7%-15%.
5. Moisture aspect Water is the source of life, and water is also an essential material for transportation camps. In the early period of water shortage, the appetite of pigs is obviously reduced, and in particular, dry powders are not favored. With the increase of water loss, the appetite of pigs may be completely eliminated.
6. The energy content of the feed is high for low feed intake, whereas low energy intake is high for the feed. In addition, some pig diseases such as parasitic diseases, colds, gastroenteritis, etc., changes in pig house temperature, swarming, laps, restocking, and epidemic prevention during the pig raising process will affect the feed intake of pigs. .
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