What Is a Lean Hog?

A research team from Cornell University in the United States, through experiments on 150 pigs, confirmed that the use of porcine growth hormone can shorten the feeding period of pigs, reduce fats by up to 74%, and increase lean meat production.

Lean pig

Name: Breeding lean pigs

Subject Terms or Keywords: Environmental Science

The research team divided 150 pigs into 5 groups and administered them to pigs at a ratio of 50 mg to 200 mg per 1 kg of body weight.

Everyone knows that lean pork is more expensive than fat pork in the market. How to raise lean pork? Scientific experiments prove that we need to pay attention to the following points.

(1) to ensure the content of protein in feed

According to the characteristics of pig growth and development, the middle and early stages are below 60 kg, which are mainly the stages of long skeleton and long muscles, and the latter stages are long fat stages. According to reports, pigs are around 20 kg, with a muscle growth rate of 18% and fat growth rates of 14% -17%; 25 kg, muscle growth rates of 63% -65%, fat growth rate of 13%; 90 kg Around, the muscle growth rate dropped to 11% -12%, while the fat growth rate soared to 50%. It can be seen that pigs are in the stage of long lean meat in the first and middle stages. During this period, the dietary protein content of pigs should be high, which should reach 15% -16%, and the protein content in the later diets should be reduced to 12% -14%.

(2) Control the energy corpus

The digestible energy contained in the feed in the first and middle stages should be high, and it should be controlled in the later stages to limit the growth rate of pigs and increase the lean meat rate. The composition of the diet throughout the feeding period is that the ratio of the concentrate and the green coarse material in the early and middle stages is 1: 0.5 to 1: 1, and the latter is preferably 1: 2.

(3) Feeding should be "front open and back limit"

In the early stage, let the pigs eat freely, regardless of quantity. Try to make the pigs as long as possible, and limit the feed intake appropriately in the later stage. However, during the feeding process, dry powder or wet mix should be fed. After the pigs are full, let them drink water freely, and not feed them as thin as fat pigs.

(4) Timely slaughter

The timely slaughter period is 90-110 kg. Because pigs grow to this point, the daily weight gain has basically reached a peak. If you continue to feed, the growth rate will slow down, feed consumption will increase, feed compensation will be low, and lean meat rate will decrease. If slaughtered prematurely, pigs will have poor growth and development and produce less meat. Timely slaughtering can reduce feed waste and improve economic benefits, and there are more lean meat and good meat quality.

(5) Prevention of diseases and insects

Pay special attention to three points: one is to do a good job of sanitation and disinfection; the second is to get vaccinated;