Nutritional characteristics of energy feed for pigs

   where the content of crude protein in feed dry matter is less than 20%, and the content of crude fiber is less than 18%, such as corn, wheat, millet, rice, broken rice, wheat bran, rice bran, etc., all belong to energy feed.

   (-) corn is the most widely used feed in pig production because of its high energy, low fiber, good palatability and high digestibility. It is known as the "king of feed" and has a wide producing area and rich resources. The pig industry all over the world, when preparing pig diets, take corn as the main body of the diet, prepare nutrition balance around it, and supplement the content of egg endoplasm. Due to the lack of lysine and tryptophan, corn nutrition is not full price, so in the preparation of feed. Pay attention to the balance of these amino acids. Yellow corn contains more carotene and lutein, higher protein content and palatability. No matter what kind of corn, its starch quality is poor, has a bad effect on pig fat, and is easy to produce soft fat. In addition, the contents of protein, calcium and phosphorus in corn were also low. Corn must be properly kept to prevent mildew. Moldy corn produces aflatoxin, which is toxic and prone to mildew corn poisoning and dysentery. General corn can account for more than 50% of pig diets, which can increase the energy content of the diet.

   (2) Wheat has high energy, less crude fiber, relatively high protein content, and better amino acid content than other cereal feed, but the price is higher. Generally, it is not used or less used in pig diets to reduce feed costs. Barley contains high protein, medium energy, good quality of protein and fatty acids, and has a good effect on lean meat growth and overcoming soft fat of pigs, so it is the best feed for pigs. Barley is also lack of lysine and carotene, and the skin is thick and hard, containing more crude fiber, so it is best not to exceed 30% in the diet and no more than 10% for young piglets. Barley is easy to be infected by scab. Barley should not be fed to pigs after infection, otherwise it will cause salivation.

   (3) the shell of rice and broken rice is hard, and there is a lot of crude fiber. The feeding amount should not be too much, accounting for 10% or 20% of the diet. Broken rice has better nutrition and less crude fiber than rice, but the content of crude protein is too low. Using rice and broken rice to feed pigs, we should pay attention to the balance of other nutrients.

   (4) Sorghum is also a high-energy feed, and its nutritional composition is similar to that of corn. If there is such a resource, it can replace 1max and 2corn in the diet. Hybrid sorghum has poor quality, thick skin, more tannic acid, bitter taste and poor palatability. Tannic acid has an effect on pig reproduction, feeding mostly causes sows not to be in estrus and boars to die. Sorghum incomplete amino acids, lack of carotene, contains unsaturated fatty acids, easy to produce soft fat, so it is not suitable to feed too much, but can prevent piglets from diarrhea, piglets and sows generally account for 15% or 20% of the diet.

   (5) the crude protein content of wheat bran is relatively high, up to 12.5%-17%, group B vivistin is more, soft texture, good palatability, light diarrhea effect, suitable for feeding late pregnancy and postpartum sows to prevent constipation, disadvantages are high crude fiber content, relatively low energy, more phosphorus and less calcium, and phytate phosphorus which is not easy to digest. The average pig diet accounts for 15% to 20%.

   (VI) Rice bran has high contents of crude fat, crude protein and B vitamins, but also high in crude fiber and unsaturated fatty acids, not resistant to storage, and high in phosphorus and calcium, which generally accounts for about 10% in pig rations.

   (7) Fatty feed oil has a high calorific value, which is 2. 25 times that of carbohydrate and protein Oil is divided into vegetable oil and animal oil, and the absorption rate of vegetable oil is higher than that of animal oil. In order to improve the energy level of piglets, promote growth and improve feed utilization rate, about 4% can be added to Japanese food for piglets.

According to   , if the above cereal feed is ground into powder with a diameter of 1cm, or made into pellet feed, the feeding effect will be improved by 15%.