Why fattening pigs are partial fat

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Some farmers have appeared to have partial fat in order to make pigs grow faster. Why? Growing pigs “eat for energy”, so dietary energy levels can affect pig feed intake, growth rate, feed utilization, and carcass leanness. For example, if the dietary energy level is reduced to 10.8 MJ/kg feed, the growth rate and feed utilization rate will be reduced, but the carcass lean rate will increase; if it is reduced to 8.8 MJ/kg feed, it will be insufficient due to insufficient energy intake. By reducing the pig's growth rate and feed utilization, the pig is very thin. If the energy is too high, partial fat will appear. Generally, the energy level of the diet is 11.9-13.3 MJ/kg feed. The energy of pigs and middle pigs is higher, and the energy of big pigs is lower. Different protein content in feed, pig growth rate and body fat will be different. When the protein content of the feed is low, the pig's growth rate will slow down. Dietary crude protein levels at 17.5% exhibited better daily gains, and when it exceeded 22.5%, daily gains decreased, but leaner percentages increased, but it was not economical to increase protein levels to increase lean percentages. . The protein level should be determined according to the law of the growth of the pig and the requirement for lean meat. For foreign high-lean lean pigs, the protein level is between 16% and 18% before 60 kg body weight and between 13% and 15% during the latter period, and between 14% and 16% during the early lean meat growth and finishing pigs. , late 12% -14% is appropriate. The effect of crude fiber should also be taken into account when formulating feeds, and the ability of pigs to use crude fiber is poor. Crude fiber content affects the palatability and digestibility of the diet. If the crude fiber content is too high, the palatability is poor, and the digestibility of the diet is reduced. If the content is too low, the pig will appear diarrhea or constipation, and because of the reduced energy intake, the weight gain of the pig will decrease, and the pig's backfat will also be reduced. Thick, so the pig's fatness can be adjusted according to the crude fiber level. Pigs and medium pigs should not exceed 5% and should not exceed 8% in the later period. Minimize or use high-fiber coarse material such as rice hull flour and wolfberry to feed pigs. Feed processing fineness, feeding methods will also affect the pig's feed intake, growth rate and fat slenderness. Feed fineness in the particle diameter of 1.2-1.8 mm is appropriate, meat intake refreshing, large feed intake, rapid weight gain, feed utilization is also high. Smashing too finely will reduce the feed intake of pigs and increase the incidence of gastric ulcers. In the case of some green feeds, a finer crushed particle size does not affect palatability and does not cause gastric ulcers. Some diets are fed better than cooked ones, and most vitamins are destroyed due to high temperatures. Feed dry feeding labor-saving, easy to use automatic feeding trough feeding, wet feed can improve feed palatability, but also to avoid feed dust, but the amount of water should not be too much, generally according to the ratio of water l:0.5— L.0 into wet mix, after adding water into a group, loose hands can be spread. Take care during the summer to prevent feed spoilage. Diluted material will affect the dry matter intake of pigs, dilute gastric juice is not conducive to digestion, so the farmer in the feeding of drowning, do not add too much water. The so-called "piggy long bones, medium long pigs, and long pigtails" are used to determine the feeding pattern according to the growth pattern of pigs, with a large amount of free feed, high daily weight gain, and a high back body thickness; The weight is lower, but the feed utilization rate is higher and the carcass is thin. However, some pigs with higher lean growth potential have less obvious responses to limited feeding and are free to feed. The average farmer feeds at the limit, and each meal is fed with a little surplus. When the weight is less than 35 kg, the gastrointestinal tract Small volume, poor digestion, should be fed 3-4 times a day. 35-60 kilograms of pigs, gastrointestinal volume expansion, increased digestive capacity, should be fed 2-3 times a day. After weighing 60 kg, it can be fed twice a day. Too many feedings will affect the rest of the pig and increase the amount of work. Balance the time of each feeding as much as possible. In summer, choose to feed when the weather is cool. When some farmers are feeding, the middle pigs are limited to feed. They think that this will adjust the shelves and increase the amount later. In fact, this will make the pigs grow fat. In general, pigs are allowed to feed for a limited period of time. After 60 kg, the feed is limited. That is, the use of free intake in the early period, the use of limited feeding later. Pigs have a relatively large amount of drinking water. Some farmers do not pay attention to these and think that as long as they use thinner or drowning water, they do not need to add water. In fact, insufficient drinking water or drinking water restrictions can cause loss of appetite, reduced feed intake, lower daily gain, and lower feed utilization. The increase in backfat size will cause illness when severe water shortage occurs. The amount of water consumed by pigs varies with body weight, ambient temperature, feed, breed, and feed intake. In winter, the amount of drinking water is 5-15 pounds, and in summer it is about 10-30 pounds. There is an automatic drinker, and it is also possible to add water to the trough at the end of feeding, and to finish the drink at the next feeding. If the above factors are properly grasped, the pig-raising benefit will increase and the pig will grow faster without being fattened.

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