Grasping the standards for pigs: different requirements for the production of pigs and pigs in different stages of growth, the different requirements for nutrients, and therefore should be based on the purpose of production of pigs, age, weight, etc., choose different feeding standards to formulate rations.
1. Grasp the pig raising standard: different production purposes of the pig and different growth stages of the pig, the different requirements for nutrients, and therefore should be based on the pig's production purpose, age, weight, etc., choose different feeding standards to formulate the diet .
Second, a reasonable choice of raw materials: When selecting feed ingredients, we must pay attention to the following points: 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., 10%-20%, bean cake, soybean meal, 15% -20%, corresponding to less than 10% of toxic cakes, such as cottonseed cakes, glutinous rice cakes, and rapeseed cakes. Animal protein feed such as fish meal, silkworm cocoon powder accounted for 3% -7%, grass powder, leaf powder less than 5%, shell powder or stone powder accounted for 3% -3.5%, bone meal accounted for 2% -2.5%, salt 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 follow the principle of adjusting measures to local conditions and draw materials from local sources and make full use of local raw material resources. 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.
Third, processing modulation should be reasonable: like 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 fried or cooked Can use it.
Fourth, the mixing of raw materials should be uniform: all kinds of raw materials must be mixed in order to ensure that the pigs eat all kinds of nutrients needed. 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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