In rural areas, raising pigs has become one of the important industries for farmers to shake off poverty and become rich. To achieve better aquaculture efficiency, it is necessary to properly match the feed. According to the physiological characteristics of pigs at each stage, the feed preparation technology is introduced as follows: 1. At this stage of the weaning stage, tissues and organs such as muscles and bones grow relatively quickly, physiological function is not perfect, gastric acid secretion is insufficient, protease and amylase formation are reduced, digestibility of plant feed is reduced, and indigestion and diarrhea are easily caused. . Therefore, the diet should use high-energy, high-protein, low-fiber concentrate type, vitamins, trace elements must be sufficient. Nutritional levels were controlled at 3300 kcal/kg digestibility, 18% crude protein, 1.2% lysine, 0.7% calcium, 0.6% phosphorus, and less than 4% crude fiber. The following substances are best added to the diet: 1 plus 0.5% to 3% organic acid can prevent diarrhea and aid digestion. 2 plus 5% to 10% whey powder to increase the gastrointestinal acidity and various digestive enzyme activity, thereby increasing feed conversion rate and pig growth rate. 3 plus 0.2% ~ 0.3% pig compound enzyme preparations, can promote digestion and absorption of feed nutrition. 4 plus 3% to 5% vegetable oil to increase the energy concentration of feed. 5 Use soaked soybean flour or fried soybean powder instead of bean cake, which is more beneficial to piglets. If it is inconvenient for small-scale farmers to purchase and use these raw materials, it is recommended to feed the piglet pellets for 1 week and then gradually transition to the young pig feed. The feeds that should be controlled in the diet include: bran no more than 10%; common soybean cakes added below 20%; protein deficiency can be supplemented with animal protein feed such as fishmeal, milk powder, and spray-dried blood meal; Cake, rough. 2. At this stage of the young pig stage, the bones and muscles grow rapidly, and the growth of fat is relatively slow. The volume of the stomach is small, and the resistance of the nervous system and the body to the external environment is gradually improving. Therefore, in addition to the large demand for protein, calcium, phosphorus, vitamins and trace elements are also relatively high. The nutrient level was controlled at 3200 kcal/kg for digestion, 16% for crude protein, 1% for lysine, 0.6% for calcium, 0.5% for phosphorus, and less than 4% for crude fiber. At this stage, feed yeast, rice cakes, and blood meal are added at a ratio of 3% to 5%, and bran is added at a ratio of 10% to 15%. However, it is not possible to feed raw meal and restaurant waste. 3. Pigs in the mid-pigs stage are mainly long skin, bone, and meat, and their fat deposition ability is weak, but their growth intensity is large, their unit weight gain and consumption are less, and they should be bred in intensity to implement excellent feeding. At this time, energy intake is a limiting factor for weight gain and lean growth. Under the premise of full price of nutrition and cost allowance, high-energy diets should be used as far as possible in order to increase daily weight gain and feed conversion ratio. Practice has shown that using high-energy diets can shorten the feeding cycle by 20 to 35 days. In order to cope with the stress that rapid growth may bring, vitamins, trace elements, and amino acids must be properly increased to reduce the crude fiber content of the diet. Nutrition levels were controlled at 3100 kcal/kg digestibility, 14% crude protein, 0.85% lysine, 0.6% calcium, 0.5% phosphorus, and less than 5% crude fiber. Feeding yeast, miscellaneous cakes, and blood meal can add 5% to 8%. The middle pig can add 5% crude meal and a certain percentage of cooked hotel waste in the later period, and can also feed 5% to 10% of high-quality green feed. 4. Big Pigs Large pigs have good digestive functions, strong digestion and absorption of various feeds, low amount of exercise, strong growth of adipose tissue, and relatively slow growth of muscles and bones. Therefore, in the late period of fattening, it is important to satisfy the supply of energy feed and reduce the proportion of protein feed. Because of the high efficiency of conversion of energy feeds into fats and the low efficiency of converting proteins into fats, it is not possible to use soymeal for fattening. Nutritional levels were controlled at 3100 kcal/kg digestibility, 13% crude protein, 0.7% lysine, 0.5% calcium, 0.4% phosphorus, and less than 6% crude fiber. Under normal circumstances rough can be added about 15%, green feed 10% to 15%. Fishmeal, fish oil, cocoon powder, untreated chicken droppings should not be added, otherwise it will affect the meat quality of pigs. In short, under the premise of various management measures in place, scientific and timely prevention of epidemic prevention, and appropriate environment, as long as the scientific formulation of feed and the rational use of feed, you can get the most economic benefits. 32 Slice CT,32 Slice CT Scan,CT 32 Slice Scanner,32 Slice CT Scan Machine MinFound Medical Systems Co., Ltd , https://www.minfoundmed.com