Fatty liver is a new type of waterfowl product developed in recent years. It is an artificial forced-fattening method after the growth and development of geese is basically completed. The liver of geese can accumulate a large amount of fat and other nutrients in a short period of time, forming 10 times more than normal liver weight. The big liver. Liver weight can reach 0.5 to 1 kg, as long as the feeding is good, every 2500 gooses can produce about 1 ton of liver fat. Goose fatty liver is rich in nutrients, full of nutrient content, especially fat content is several times more than normal liver, fat contains a large number of unsaturated fatty acids, is the first of a variety of livestock and poultry. Unsaturated fatty acids can lower the level of cholesterol in the blood, and some fatty acids are linoleic acid, an essential fatty acid that the body can only consume from food. Goose liver is also rich in eggs, deoxyribonucleic acid and ribonucleic acids, various amino acids, including the full content of essential amino acids. So goose liver is a promising commodity. With the improvement of the living standards of the people in the country, the demand for goose fatty liver will gradually increase, and the supply in the international market will be in short supply. Now the foie gras fattening technology is introduced as follows: - Selection of goose breeds and embryonic bodies. It is better to use meat-type hybrids with large adult size, short neck, fast growth, and easy fattening. The use of lion-headed geese, Xupu geese, eastern Zhejiang geese, western Yunnan white geese and their hybrid geese for fattening livers is better in China. Embryos can be male and female, but female geese are more delicate; Second, the management of pre-feeding geese raised to 10 weeks of age significantly slowed down the growth from 11-week-old mandatory compost. Before the start of filling, young geese should have a pre-feeding period of 3-4 weeks. The purpose of the pre-feeding period is to cultivate geese that are of good quality, can withstand feeding, and can maintain a healthy body. Pre-feeding period, the best grazing, try to allow the geese to eat freely, eat some green feed to make the esophagus soft, digestive tract expansion performance is good, so as to avoid accidents after filling. Before the pre-feeding, geese should be pre-vaccated immunization and medication deworming work. Third, timely feeding 1. During the period of filling, when the goose grew to 4.5 kg, it began to feed, and the weight was too light. The passing rate of fatty liver was low, and the growth effect was poor. Excessive heavy material consumption, large cost, and economically uneconomical. The hot weather from July to August is not suitable for feeding. 2. Filler preparation: The feed is mainly made of starch-rich cereals such as corn, but corn contains less choline, so it is necessary to mix some wheat feed properly. Yellow corn is better than white corn, and the fatty liver produced by yellow corn production is pure yellow, and the fatty liver produced by white corn is pink. The specific method of preparation is to pour dry corn into the pot and add water. The water surface should be 4-5 cm thicker than corn, boil it for 5-10 minutes, or soak the dried corn for a while, then stir it over. Pour the dry corn into a pan, stir fry until golden brown over low heat, soak in water for 4 hours before feeding and dry. When hot, add 10 grams of salt per kilogram of corn and 20 grams of vegetable oil, and mix 5 grams of multivitamins for poultry. The corn grain in the first week of starting the feeding can be hard-filled. The corn in the last week of feeding should be soft. The feed must be hot and cold, and it should not be hot. 3. Filling method: when the artificial filling is carried, the goose is clipped between the two knees of the filler, the goose head is exposed upwards to the neck, and the left hand opens the goose mouth, and the right hand catches the food and puts it into the mouth, and repeats several times until it is full. If feeding with electric screw propeller filling machine, each morning and evening. The first week of filling should not be too much, each 100-150 grams; the second week can be gradually increased to 300-350 grams; the first 3 weeks can be filled with 400-500 grams, how much filler should be filled to two degrees lower than the throat , General feeding for 3 weeks, but also feeding for 4 weeks, fattening period can increase weight 50% -80%. 4. Filling period management: Feeding period of the breeding density of 3-4 per square meter, each small group of about 3O is appropriate. It is better to be able to raise nets and captives, limit goose activities, and do not swim under water, but only give appropriate exercise. When filling, you must lightly catch, fill in, and put lightly. Filling volume is increasing day by day, fat is deposited in a large amount, the liver is also rapidly hypertrophy, and indigestion is prone to occur. At this time, each goose can feed 1-2 milk enzymes, and at the same time, it is guaranteed to supply clean drinking water day and night, but attention should be paid to keeping the goose ring Houses are dry, and generally every time they are fed, they are required to padded the hay once in order to prevent the humidity from getting too large. IV. Slaughter Liver and Preservation The goose body is very weak at the end of filling and feeding. The fatty liver is easily broken and it is best to be slaughtered on the spot. If slaughter is required for transporting by transport, the transportation and loading and unloading process should be done in a light and steady manner so as to avoid damaging the liver and affecting the passing rate of fatty liver. Gooses can be slaughtered after 3-4 weeks of feeding. Slaughter must be carefully cut off the carotid artery, put the blood upside down, use hot water at 65°C-75°C to burn the feathers, put the feather velvet and put it in the freezer or cold store at 0°C-5°C for 15-20 hours The visceral organs were removed and the liver was removed. At this time, the movement should be light and slow to prevent the pricking of gallbladder and to ensure the integrity of the fatty liver, and then dilute the bile for 10 minutes after removing the bile and then remove it with sterile gauze. Refrigerated (2°C-4°C) according to weight and regulations, do not stack and squeeze. Normal fatty liver requires uniform liver lobes, well-defined contours, smooth and elastic surfaces, and uniform color (light yellow or pink). High-quality fatty liver requires soft texture, no damage, yellowish blood spots, and heavier liver weight. Goose liver preservation process is to first wash the liver, grading, and then put 4%-6% concentration of salt water soak (in order to submerge degrees), and then inflated with carbon dioxide or nitrogen inert gas, the final packaging placed about 2 °C Storage. You can keep fresh.
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