Grasping the pig's feeding standards Pigs of different production purposes and pigs of different stages of growth have different requirements for nutrients. Therefore, depending on the purpose, age, and weight of the pig, different feeding standards should be used to prepare the diet. Reasonable choice of raw materials When selecting feed ingredients, the following points must be noted: First, pay attention to the type and amount of raw materials. The variety of raw materials should be diversified in order to facilitate the use of nutritive complementarity between various raw materials. The proportion of commonly used pig feed is cereals such as corn, rice, barley, wheat, sorghum, etc., accounting for 50-70%, bran such as wheat bran, rice bran, etc. account for 10-20%, bean cake, soybean meal accounting for 15-20%. , Toxic cakes, such as cottonseed cakes, glutinous rice cakes, and rapeseed cakes, etc. should be less than 10%. Breeding pigs should not use cottonseed cakes and glutinous rice cakes. Animal protein feed such as fish meal, silkworm cocoon powder accounted for 3-7%, grass powder, leaf powder was less than 5%, shell powder or stone powder accounted for 30-3.5%, bone meal accounted for 2O-2.5%, salt was less than 0.5%. The second is to pay attention to the characteristics of feed ingredients. To grasp the relevant characteristics of raw materials, such as palatability, the content of toxic and harmful ingredients in feed, and feed pollution, mildew, etc., poor palatability, the amount of raw materials containing toxins should be limited, serious pollution, mildew The raw materials should not be used. The third is to attach importance to the principle of economic efficiency. We must fully utilize the local raw material resources based on the principles of local conditions and local materials. Fourth, pay attention to the volume of raw materials. In order to ensure that the pig can eat the nutrients it needs every day, the volume of the selected raw material must be compatible with the volume of the digestive tract of the pig. If the volume is too large, the amount of feed required by the pig per day can not be consumed, resulting in the nutrients can not meet the needs At the same time, it will also increase the burden of the digestive tract; if the volume is too small, although the nutrients are satisfied, the pigs are not full and feel uneasy and affect the growth and development. Processing and preparation should be reasonable in addition to wheat bran, rice bran, fish meal, bone meal and other powdery raw materials, corn, beans, rice and other seed raw materials should be properly crushed, raw soybeans can not be fed directly to the pig, must be cooked or cooked before use. The mixing of raw materials should be uniform. All raw materials must be mixed evenly to ensure that the pigs eat all the nutrients they need. Especially when premixed feeds are added, if the mixed feeds are not uniformly mixed, it is likely to cause pig drug or trace element poisoning.
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