At present, the low slaughter rate, low carcass weight, low lean meat ratio, and unreasonable price of pigs and grains in the development of swine production seriously restrict the development of scale and intensification of the aquaculture industry. Local pig breeds in China are characterized by strong fertility and resistance, good flesh quality and gentle temperament. They can make heavy use of green roughage. However, the growth is slow, the slaughter rate is low, and the lean meat is low. The three-way hybrid pig has the characteristics of fast growth, high feed utilization rate, high lean meat percentage, and obvious economic benefits, and is suitable for promotion. Sanyuan pigs have internal Sanyuan pigs and foreign Sanyuan pigs. The internal three-way hybrid pigs mainly use female pigs from China's local breeds as female parents, and use the hybrid pigs whose foreign meat-type pigs are male as female parent, and then use the foreign pigs of imported meat breeds as terminal male parents. Produced by hybridization. All three yuan outside the use of exotic varieties of hybrid.
The breeding of three yuan pigs must master and use the growth and development of pigs, control nutrition, environmental factors, the use of advanced feeding and management techniques, increase daily weight gain, reduce feed consumption and production costs.
Buying pigs and Miao pigs in swine production, especially in the rearing stage of the swarm, often occur when the boar meets the mother to stay and see the seedling bite, and cannot be carefully selected. This is inconsistent with the requirements for scientific swine breeding. of. To purchase breeding pigs and Miao Pigs, we must pay attention to the following points: First, the purpose of introduction must be clear. Second, the introduced pig species must be adapted to the local environmental conditions; Third, it is necessary to understand the genealogical situation; Fourth, it is necessary to identify the good appearance; Appetite is better.
Post-weaning Piglet Management
Appropriate dietary nutrition levels The amount of crude fiber in the diet of hogs affects daily gain and carcass leanness. For each 1% increase in dietary fiber, organic matter (or energy) digestibility and 1.5% crude protein can be reduced by 2%, resulting in reduced feed intake, reduced daily gain and reduced backfat, and lean meat percentage. rise. It is recommended that when dietary crude protein and digestive energy levels are normal: body weight 20 kg - 35 kg, crude fiber content is about 5%-6%, weight is 35 kg - 90 kg stage is 7%-8%, but should not exceed 9 %.
The main task during the period of birth care is to make the Miao Pigs safe, prevent the false death, suffocation, frozen death and the sow's miscarriage of the newborn pigs, and to prevent and treat certain diseases of the Miao Pigs after birth. The Miao Pigs should eat colostrum in time. Miao pigs create a comfortable and comfortable living environment with appropriate temperature and humidity.
About 20 days after birth, the feeding and management period is the time when the sow's lactation peak is about to decline, and the young pigs grow faster, and they need to be fed again. The main task is to allow the Miao Pig to feed the full-price nutritional feed as soon as the sow's lactation is reduced, supplementing the lack of sow lactation and the need for rapid growth of the Miao Pig. Care is particularly important in the three days after birth. The main task of this period is to fix the nipple and prevent the sow from being crushed and stepped on to observe whether the piglet is diarrhea and other diseases and timely treatment.
During the weaning feeding and management of the weaned pigs, the nutrients for growth and development have changed, the physiology of the lead period has changed greatly, the resistance and immunity have been reduced, and the disease is easy to attack. Therefore, it is necessary to create a good environment for the piglets. Configure a reasonable feed for feeding. The main task of this period is to keep the weight gain rate of the Miao Pigs unaffected and to protect the Miao Pigs from becoming ill and prepare for fattening.
Provide suitable environmental conditions
The appropriate temperature and humidity for pigs of different body weights require the optimum temperature to be different. 11 kg - 45 kg of live pigs, shew temperature is 21 °C, 45 kg - 90 kg live pigs, shew temperature is the most suitable 18 °C, 135 kg -160 kg live pigs, the best temperature 16 °C. When the temperature is too high, you can use shelters, showers, feed more cold water and juicy green feed and other measures to increase the pig's daily gain. When the temperature is too low, insulation measures should be taken to increase the temperature. Such as promoting the use of plastic warm pigshed and hedgegrass method.
Appropriate lighting conditions and ventilation time and light intensity are suitable. Live pigs must be ventilated throughout the year. However, in the winter, the contradiction between ventilation and warmth should be handled properly. It is not only necessary to pay attention to keeping warm and neglecting ventilation, resulting in poor air sanitation in the pig house, lower pig weight gain and increased feed consumption.
Appropriate environment and disinfection Pay attention to the greening of pig farms, timely remove and properly dispose of excreta, dirt, etc. to make the pig houses well ventilated and clean and disinfect pig houses.
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