The most economic feeding time for meat livestock

The growth and development of meat pork pigs is characterized by slower growth in the early stage, faster weight gain in the middle period and faster fat deposition in the later period. Under normal circumstances, 20 to 30 kilograms of fattening pigs are the peak of bone growth, 60 to 70 kilograms are the peak of muscle growth, and 90 to 100 kilograms are the peak of fat accumulation. The weight gain has a great relationship with the variety and nutrition level. The peak period of muscle growth of the breed pig is about 50 kg (3 to 4 months old), and with the increase of the age, it reaches 70 kg (4 to 5 months old). The intensity of fat growth has increased significantly and gradually exceeds the intensity of muscle growth, and the body begins to deposit large amounts of fat. The slaughter benefit is best when the weight reaches 90 kg. Local precocious varieties are most suitable for slaughter when they weigh about 75 kg. At this time, the meat quality is good, and the slaughter rate is also high; the slaughter rate is 7 to 8 months (90 to 100 kg) at the age of 7 to 8 months for the binary or ternary crossbred pigs that use the local pig as female parent and the male lean hog as a parent. optimal.

The daily gain of meat beef cattle is faster and slower with age. Bulls generally grow faster than calves, and calves grow faster than cows of the same breed. There are also differences in weight gain among different feeding methods: In the case of house feeding, young calves gain weight faster than calves and heifers, and they have good meat quality and low feed consumption. In free-range breeding, the calf's weight gain and feed conversion rate are relatively reduced, while the young female calves and yak calves gain more quickly, and the fat and meat are more tender, but feed consumption is high. Beef cattle fattening, in the vigorous growth period of 10 to 18 months, through the use of matching feeding techniques for 80 to 150 days of concentrated fattening, when the weight of 450 to 500 kg, the best slaughter benefit. The fattening of old cows can only allow them to recover the public opinion in the short term, and it is impossible to have greater weight gain and the benefits are relatively poor. Experiments show that the yaks have the fastest muscle growth in the first 6 to 8 months after birth, and later with the increase in body weight and age, muscle growth slows down and the feed utilization rate gradually decreases.

Meat mutton sheep production is mainly based on grazing, but also can be fed. Sheep are rapidly growing from birth to 12 weeks of age. It has been determined that the sheep can grow at an average daily weight of 170 grams during the fast growth period, with a continuous growth period of 12-30 weeks, and an average daily weight gain of 135 grams. The cumulative growth is still on an upward trend. Most sheep have the fastest weight gain during 7-9 months of age. Sheep gained about 40 kg in 9 months and meat goats in 35 kg. Therefore, we should grasp the early growth of mutton sheep.

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