1, feed a variety of reasonable green materials containing more moisture, good palatability, easy to digest, and contains a variety of vitamins, minerals and proteins. The coarse material is bulky, and the contact surface between the crude fiber and the digestive fluid makes the pig feel full and has a laxative effect, but is difficult to digest. The fine material is characterized by small size, high nutritional value, and easy digestion, but the lack of minerals and vitamins. Therefore, in conjunction with pig feed, should be a reasonable mix of green, coarse, fine feed, and appropriate mineral supplement feed (such as bone meal, salt, etc.) to meet the nutritional needs. 2, pay attention to the diet volume with the pig feed, the excessive coarse material, the nutrition is poor, large, the pig can not finish, nutrition can not be satisfied; all bad with no green roughage, although able to meet the nutrition, but due to volume Small, pigs are not eating enough. The dietary volume can be calculated as 2.5-4.5 kg of air-dried feed per 100 kg of pig body weight per day. The ratio of green, coarse, and fine feed is roughly 5:3:2 for air-dried material. For example, for a pregnant sow weighing 150 kilograms, 5 kilograms of dry matter is required for feed in one day, 2.5 kilograms comes from green material (1 kilogram dry material for green material is 1 kg dry weight, 15 kilograms for green material); 1.5 kilograms comes from coarse Material; 1 kilogram from fine material. The total weight of green, refined, refined, and feed is 17.5 kg. 3, feed a good palatability feed, such as high energy and protein content, less crude fiber, the palatability is good, easy to digest; on the contrary, low energy and protein content, crude fiber, poor palatability, difficult to digest. When formulating pig feed, green fodder should be used more often, and roughage should be used less, and the required quality of roughage should be good. 4. Use fattening pigs suitable for dietary piglets, boars, and fattening stages. Fine concentrates may be used to make up more than 50% of the total diet; per-sorghum sows and gilts may use green materials. Green feed may account for 50% of the total ration; shelf-fed pigs may use bran type, and bran-type feed may account for more than 50% of the total ration.
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