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Management of fattening goose
First, the selection of varieties of fattening goose breeders is one of the important factors affecting the production of fatty liver. Different goose breeds have great differences in liver performance. Not all geese can produce fatty liver. For example, our country's small-scale geese are mainly egg-producing and have poor liver performance, and should not produce fatty liver. Can be used for fatty liver production of large goose species such as lion head geese, the average fatty liver weight 600 grams, up to 1400 grams; the world-famous fatty liver special French Landes goose average liver weight 836 grams, the largest 1780 grams. Although the above-mentioned several large gooses have good liver performance, they have poor reproductive performance. Therefore, the use of heterotic advantages to cultivate meat liver hairs and high-yield production lines to produce fatty liver is an effective method to increase the production level of fatty liver. Therefore, in order to produce goose fatty liver in addition to the special selection of fatty liver, it is from the breeding goose farm to purchase the high-yield production line of the production of fatty liver through cross breeding. Second, the production of fatty liver goose research shows that corn is the best high-energy feed, the analysis found that per kilogram of corn contains about 400 mg choline, phosphorus 0.25%, are lower than other high-energy feed. Because choline has the function of maintaining normal liver function in animals, it is helpful for the transfer of fat in the liver, preventing the excessive deposition of fat in the liver and protecting the liver. Therefore, the higher the choline content in the feed, the better it can prevent fat accumulation in the liver and affect the effect of fertilizer application. In addition, due to the low choline content in corn and poor liver protection, fats are easily deposited to form fatty liver. Therefore, using corn as a fat liver feed, the average weight of fatty liver is 20% to 45% higher than that of any other high-energy feed. This is the first choice for the production of fatty liver at home and abroad. When corn is used as feed, corn kernels are used instead of comminuted corn, because corn has many voids, large volume, and affects the amount of filler. In order to increase the amount of filler and increase liver weight, corn kernels must be used on the material. There are three kinds of processing methods for corn kernels, namely, boiled method, dry frying method and soaking method. The three methods are most suitable for water boiling. Pour the selected dry corn (preferably the smaller pellets are better) into a boiling water pan to make the water 10 cm above the corn, boil for 8 minutes, remove and drain and hot mix 2% animal fat, add 0.5% of salt, 0.02% of multivitamins, and appropriate amount of trace element additives can be mixed well with corn. Third, the pre-feeding period of feeding and management must be pre-feeding 2-3 weeks before the filler, through the pre-feeding to further growth and development of geese, enhance physical fitness, increase liver homogeneity, improve liver fat quality. At the same time, the goose's digestive ability is pre-feeded to allow the goose to feed a large amount of feed, so that the digestive tract expands and is soft, so that it can bear a large amount of feed when it is forced to fill. Pre-feeding can feed the full-price compound feed in the early stage, and gradually reduce the compound feed to increase the corn grain content in the diet after 10 days. Feeding corn kernels at the end of pre-feeding to accommodate all fillings with corn kernels. It should be emphasized here that the pre-feeding period should be fed with green feed as much as possible to increase digestive tract capacity. Before the start of pre-feeding, the goose shall be quarantined, dewormed and house-fed, and each grazing may be conducted once every morning and afternoon. The goose house should be clean, flat, dry and quiet. Feed 2 to 2.5 animals per square meter of ground and the water supply is adequate and clean. Stop grazing three days before the end of the prefeed period. Fourth, feeding and feeding management during the filling period is one of the most critical links in the goose fatty liver production process. Filler operation technology, mastering the amount of each filler, the length of the filling period will affect the quality of liver and weight gain. Before filling, the goose is loaded in a special cage. According to the specifications of the packing cage, generally 5-6 cages per cage are used, and special fillers are used for packing. Fill 4 times a day, that is, 8 o'clock, 14 o'clock, 20 o'clock, 2 o'clock. The amount of filling can be controlled flexibly according to variety and size. The amount of filling material is insufficient to affect the weight gain of the liver and the amount of filler is too large to accumulate food. Before each filling, you should touch the swelling part. If the feed has been digested, it shows that the digestion ability is good, and the filler amount can be increased next time. However, the esophagus of the goose throat is relatively narrow. When intubating, besides applying oil to the tube, special care must be taken to prevent damage to the esophagus. After the tube is inserted into the esophagus, the left hand fixes on the head, and the foot starts on the starter. The corn kernel advances with the operation of the screw propeller to the inflating part. The stuffer gently pushes the corn grain down with his right hand, and then steps on the starter. , and then push the corn kernels until they are filled. In general, the filling period is about 3 weeks, depending on the performance of the goose. If the stuffed goose eyes are apathetic, apathetic, shortness of breath, feathers messy, body fat, sagging abdomen, do not love action, and even paralysis, such as indigestion symptoms of plot food and diarrhea show that the fatty liver has matured, to be timely slaughtered liver .