In the process of raising pigs, the feed factors affecting the feed intake of finishing pigs are as follows:
The palatability of
1, dry and wet problems
There are three kinds of feed materials for pigs, namely: dry powder, wet mix (water 1:1) and thinner. According to the test, the wet feed feed method has the best feed intake and the thinner material is the worst.
2, crushing particle size
The corn size requirement is preferably from 0.8 mm to 1.5 mm. If it is too coarse, the utilization rate of the feed is reduced, resulting in waste; too thin, long time may cause peptic ulcer, which is not conducive to health, and the palatability of the fine material is also decreased, thereby Affect feed intake.
3, the content level of crude fiber
If the crude fiber content in the feed is greater than 6%, the feed intake of the pig decreases.
4, salt
The demand for salt in normal growing fattening pigs is 0.45%. If the salt is reduced from 0.45% to 0.2%, the feed intake of pigs can be reduced by 20% and the weight gain is also reduced by 38%.
5, sweetener
The taste of the pig is very developed. The taste buds of the tongue are three times that of humans. The most favorite food for pigs is sweetness. If the feed contains sweeteners, the feed intake will increase.
Changes in feed odor will also affect pig feeding
The pig's sense of smell is so developed that it is so sensitive to changes in feed odor that it affects feeding.
1. Changes in flavoring agents, such as the conversion between frankincense, surimi, fishy, ​​and sweet, or too long in the air, make the odor volatile, which will affect their feeding.
2. The mold is mildewed and deteriorated. If the feed is contaminated by mold, the feed will be mildewed and mildewed, and the feed intake of the pig will decrease regardless of the smell or palatability.
3, the feed rancidity environment temperature is high or the feed storage time is long, the crude fat in the feed will oxidize rancidity, there is what we usually call the halal taste, so that its feed intake declines.
4, the difference in the type of oil, such as the addition of soybean oil, corn oil, etc., the smell is not the same, if it changes, it will affect the feed intake.
5. The influence of the special odor of other raw materials on the feed, such as the content of fishmeal, the quality of the fish, etc.
Some feed ingredients directly affect the physiological response of pigs, so that their feed intake is reduced.
1. Amino acid is insufficient or unbalanced in the feed, which has a great influence on the feed intake of pigs. Tests have shown that the feed intake of pigs increases with the increase of lysine levels in the feed, but after a certain degree, the feed intake tends to decrease.
2, minerals in the feed zinc and phosphorus deficiency and calcium, manganese, iodine and iron in excess, will cause poor appetite.
3, vitamins B1, B2, B12 and the lack of niacin, pantothenic acid will reduce the feed intake of piglets, such as B1 deficiency, will affect the tricarboxylic acid cycle in pigs, so that propionic acid accumulated in the body, and damage digestion Road system, affecting appetite.
4. A large number of tests on antibiotics have shown that adding a small amount of antibiotics to pig diets can increase pig feed intake by 7%-15%.
5, water is the source of life, water is also a necessary substance to transport nutrients. In the early stage of water shortage, the appetite of pigs is obviously reduced, especially the dry powder is not loved. With the increase of water loss, the appetite of pigs may be completely abolished.
6. In terms of energy, the energy content of the feed is high and the feed intake is low, while the energy value is low, the feed intake is high. In addition, some pig diseases such as parasitic diseases, colds, gastroenteritis, etc., changes in the temperature of the pig house, the transfer of the pigs, the circle, the refueling, the epidemic prevention process, etc. will have an impact on the pig's feed intake. .
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