The cultivar genetic composition must scientifically regulate the three-hybrid lean lean breeds. Blood associative relationship has a great influence on the daily gain, feed-to-weight ratio, slaughter rate and lean meat percentage. Therefore, the ancestry of the three-way crossbred pigs must have a certain blood relationship. To be clear, there must be specific marks and information for inspection.
Early growth and development of piglets must be closely related to the birth weight, weaning weight and weight gain. The sign of good growth and development of the piglets is that they weigh more than 17.5 kg at the age of 45 days. This shows that the pigs have good growth and development during the fetal period and the lactation period, and the daily growth and feed-to-weight ratios during the fattening period are ideal. If you can not determine the age of the pig, can be determined by observing the degree of sexual organ development. If the pig weights 20 to 25 kilograms, the boar's testes and the sow's cunt do not begin to develop, indicating good growth and growth, and vice versa.
Reasonable use of nutrients with insufficient full-rate feed is a major factor in pigs' inability to achieve maximum production potential. Nutrients in feed also have an impact on the immune function of pigs, and carcass quality is directly affected by the feed variety. Therefore, in order to obtain the maximum production efficiency of the three-way hybrid lean hog, the full price of the feed is one of the keys to success.
Pay attention to save feed costs Feed accounts for about 70% of the cost of raising pigs. In order to reduce the cost of feeding while meeting the nutritional requirements of pigs, the following methods can be used for management: multi-stage breeding. Divide the growth period of pigs into several stages, and adjust the proportion of protein feeds with higher prices—the concentrate premix and the basic material—once every 10 days, that is, reduce the proportion of premixes from 20% for every 10 days. Percentage point, the basic material is increased by 1 percentage point every 10 days. Raw material dry feed. Many nutrients in feed, especially vitamins, are easily destroyed and inactivated at high temperatures, so they should be fed raw (except beans). Some nutrients will be lost in the water and some chemical changes will occur. Therefore, the raw material dry feeding technology should be promoted. Pigs eat dry foods can increase the number of chewing, promote saliva secretion, so that the digestive enzymes in saliva can fully play a role in improving feed utilization. Limit feeding. Restricted feeding can improve feed utilization and the lean meat percentage of commercial pigs. When the weight of the pig is 60 kg or less, do not limit the feeding so as not to affect the daily weight gain. When the weight is above 60 kg, the digestive organs of the pig have been well-developed and the feed intake is large. The restriction of feeding can save the feed and reduce fat deposition. Improve the purpose of lean meat. The standard of feed restriction is generally 80% to 85% of the full-food intake. Timely slaughter. The growth and development of pigs is carried out in the order of bone-meat-fat. The longer the pigs are fed or the greater the weight, the more fat is deposited, and the thicker the pigskin is, which will reduce the carcass leanness. In addition, the energy consumed by pigs to deposit fat is 9 times that of protein, so feeding "big pigs" will pay a huge feed cost. Three-way hybrid lean pigs generally weigh 70 to 90 kilograms.
Doing a good job of raising the ecological environment and reducing the stress response The three-way hybrid lean pig is more sensitive, prone to stress, affecting growth and health, and even causing death. For example, if the appetite of pigs decreases in high temperature environment, the weight gain will be slow; the low temperature will increase the nutrient consumption of the pigs; the breeding density, noise and air pollution will be serious, making it difficult for the pigs to be quiet, causing biting tails, biting ears, and fighting. Therefore, it is necessary to keep the pig houses cool in winter, cool in summer, ventilated and breathable, and suitable in density so that the pigs can be healthy.
In addition, we must also do a good job of preventing epidemics, sealing and isolation, and regular disinfection to ensure the safety of the herd.
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