I. Problems to be paid attention to when preparing large-scale pig farms
1. Crude fiber: The external three-way crossbred pigs reared on large-scale pig farms are recognized as lean-type pigs, and the crude fiber level of their diets should not be too high. Generally, the growth and finishing pigs are 3% to 4%, and the energy feed is mainly Corn, wheat bran and protein feeds are mainly formulated with raw materials such as soybean meal and fish meal, which have low crude fiber content. Do not use raw materials with high crude fiber content such as rice bran and rice.
2. Crude protein: The lean meat percentage of pure three-way hybrid pigs is generally above 60%, and the proportion of protein in lean tissue is high. We must give full play to the genetic potential of lean-type pigs to synthesize muscle tissue, so in terms of nutrition, we must provide enough crude protein through the diet. The lean-type pigs had a 17.5% dietary protein level at a body weight of 15-30 kg, a weight ratio of 16.5% at 30-60 kg body weight, and a body weight of 60 kg to 15.0%. Dietary protein nutrition is actually a nutrient of amino acids. The balance and supply of amino acids in lean-type pig diets are particularly important. Actual feed preparation often requires the addition of 0.1% to 0.15% lysine in the diet. Methionine 0.05%-0.08%.
3. Nutritional balance: Large-scale swine farms have a high density of pigs and are kept off the soil (usually cement floors), lack of sunlight and green feed supply, and fed diets with high protein and high energy levels, combined with lean meat types. The growth rate of pigs is fast, and the daily weight gain is as high as 0.8 kg or more. Therefore, the concentration of vitamins, minerals, and trace elements in the diet needs to be increased accordingly. Otherwise, the imbalance of dietary nutrient levels may result in the waste or relative lack of certain nutrients in the diet. Many large-scale pig farms have realized the benefits of using concentrates and premixes from their production practices. It is worth pointing out that some medicines with a small amount of excess, that cause poisoning, such as sodium selenite, olaquindox, etc., are difficult to achieve evenly by self-ingredients by artificially mixing feed, and feed manufacturers can do this. .
Second, the issue of paying attention to the selection of large-scale farms
1, depends on the technical strength of feed manufacturers. High-quality feed is produced using high-quality raw materials, combined with scientific feed formulas and advanced processing techniques. The procurement and testing of high-quality raw materials, the scientific level of feed formulations, and advanced processing technologies are all closely linked to technological strength. Due to unscientific feed formulation or improper processing technology, the lack of vitamin A caused the quality of boar semen to decline and directly affect the sow's litter size and survival rate.
2, depends on the feed manufacturer after-sales service. The after-sales service of the feed manufacturer includes the pig-raising benefit of the feed they produce and the problems caused by the feed itself. Some manufacturers can also provide consultation and diagnosis for pig diseases caused by non-feed factors. For example, when an outbreak of toxoplasmosis occurs in pigs, manufacturers can produce feed supplemented with sulfa drugs and pyrimethamine for the prevention and control of pig farms; For pig farms with severe yellow and white piglets, it is also possible to add certain drugs to the sow's feed as part of a comprehensive control of these diseases.
3, depends on the production of pig feed effect. The quality of the selected feed can be tested in pig production practices. High-quality feed Under good feeding and management conditions, the growth rate of the pig can reach the expected daily weight gain. The feed weight ratio is maintained at a 2.8 to a 3.2:1 level. It does not cause nutrient metabolism and toxic diseases in growing-finishing pigs. Hogs are not found to be sold because of residual drugs or illicit drugs; feeds for breeding pigs do not cause reproductive problems due to nutritional factors and certain toxins or drugs. In terms of pig-raising efficiency, it should be equal to or higher than that of pig farms of the same size and same scale.
Third, pay attention to the correct use of feed
At different physiological stages of pigs, dietary nutrient requirements are different. According to the nutritional needs of the pigs at various physiological stages, the correct preparation of the diet or the purchase of feed, and reasonable rearing, can be the most effective way to play the potential of lean-type pigs, and to maximize the economic benefits of large-scale pig farms. However, some large-scale pig farms use growing pigs to feed the breeding pigs. A longer time may bring great harm. One is that the vitamins used in growing fattening pig feeds do not meet the requirements for breeding pigs, such as various vitamin levels and whether they are supplemented with biotin; second, growth and fattening pig feed is used to promote growth, such as high copper, high zinc and high doses of antibiotics. These substances may have adverse effects on the reproductive performance of breeding pigs. Third, growth and fattening pigs feeds are used to reduce feed production costs. They are provided with a certain percentage of cotton and vegetable quail, while cotton and vegetable quail are strictly prohibited in the breeding of pigs. Lead to breeder breeding obstacles. Breeding pigs must be purchased or self-specified.
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