In addition to the selection of different feeding standards based on the pig's production purpose, age, weight, etc., the farmer should grasp the following four points in selecting feed ingredients.
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% to 70%. Bran cereals such as wheat bran, rice bran, etc. account for 10% to 20%, and bean cakes and soybean meal account for 15% to 20%. Toxic cottonseed and rapeseed cakes, quail, animal protein feed such as fishmeal should be less than 10%. Grass powder, leaf powder less than 5%, shell powder or stone powder accounted for 3% to 3.5%, bone powder 2% to 2.5%, salt less than 0.5%.
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 restless, which affects the growth and development.
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.
Pay attention to economic principles. The principle of local conditions and local materials should be used to fully utilize local raw material resources so as to save expenses, reduce costs, and increase income.
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