How to fattening lambs?

(agricultural get Rich Network) how to fatten lambs?-- a. Ingredients of artificial milk: before 20 days old: 68% skimmed milk, 29% fat, 3% phospholipids; 20 days to 40 days old: 80% skimmed milk, 17% fat, 3% phospholipids; b. Content of additives in artificial milk (per ton): trace elements-cobalt chloride 1.2 grams, copper sulfate 20 grams, potassium iodide 0.3 grams, sodium selenite 0.2 grams; minerals-table salt 10 kg, bicarbonate 5 kg; vitamin A 20 million units, B6 million units, E20 million units, B1 1.5 grams, B2 1.5 grams, B6 750 mg, B12 50 mg, K400 mg Synthetic amino acids-lysine 1 kg, methionine 2 kg; bioactive substances-chlortetracycline 50 g, sandoquine 50 g, methylated hydroxytoluene 70 g. First, the inherent favorable factors of fat lamb production 1. Lamb meat contains more lean meat, less fat, low cholesterol content, fresh and juicy meat, small taste, easy to be digested and absorbed by the human body. two。 The growth and development of lambs is fast, and the daily gain can reach 180,230g from birth to 2 months old, and 100150g from 2 months to 10 months old. The feed conversion rate of fat lambs is also high, up to 3-4:1, while that of adult sheep is 6-8:1. 3. The utilization efficiency of plant protein in lambs is very high, which is 0.5 ~ 1 times higher than that of adult sheep. 4. The production cycle of raising fat lambs is short, the product rate is high and the cost is low. Second, intensive, industrial and large-scale raising of lamb can make full use of advanced technology and experience in lamb production. 1. Induced delivery in pregnant ewes means that 70% of ewes give birth to lambs 12 hours after intramuscular injection of corticosteroids-glucocorticoids (140 days). In this way, lambing is convenient for centralized management, and it is also convenient for ewes to concentrate estrus and breed. two。 After early weaning, the lambs were weaned early, then dewormed and fattened forcibly for 2 ~ 3 months. Minimize activity and light during the fattening period. There are two ways for lambs to be weaned early. a. 3 ~ 4 days after birth, and then transferred to the dry feeding period; b. The lambs were 45 ~ 50 days old after birth, and immediately transferred to the dry feeding period after weaning. Because colostrum is rich in protein, fat, minerals and vitamins, especially magnesium ions and a variety of antibodies, it plays a special role in promoting meconium excretion and enhancing disease resistance. 3. Using artificial milk to raise lambs a. Ingredients of artificial milk: before 20 days old: 68% skimmed milk, 29% fat, 3% phospholipids; 20 days to 40 days old: 80% skimmed milk, 17% fat, 3% phospholipids; b. Content of additives in artificial milk (per ton): trace elements-cobalt chloride 1.2 grams, copper sulfate 20 grams, potassium iodide 0.3 grams, sodium selenite 0.2 grams; minerals-table salt 10 kg, bicarbonate 5 kg; vitamin A 20 million units, B6 million units, E20 million units, B1 1.5 grams, B2 1.5 grams, B6 750 mg, B12 50 mg, K400 mg Synthetic amino acids-lysine 1 kg, methionine 2 kg; bioactive substances-chlortetracycline 50 g, sandoquine 50 g, methylated hydroxytoluene 70 g. 4. After 56 days of weaning, each lamb was fed with 5 kg ~ 5 kg of grass and 0.5 kg of concentrate. 20 days after weaning, each sheep was fed 2.5 kg of mixture (80% of hay powder and 20% of concentrate), the live weight of fat lambs increased from 37.4 kg to 47.2 kg, the average daily weight gain reached 173 grams, and 8.2 kg feed units were consumed for every 1 kg weight gain. Large double-layer slit floor barns are used in Hungary to fatten lambs, each of which can hold 3000 ~ 5000 lambs. There are seams in the upper layer to facilitate the fall of feces, a scraper conveyor for conveying pellet feed and a long-running drinking water tank, and a scraper-type manure cleaner in the lower layer. The lamb was weaned from 60 days to 120 days after birth. After 76 days of fattening, the average daily weight gain reached 230 grams, the body weight after fattening reached 34 kg ~ 40 kg, and the slaughtering rate was 47.6%. Czechoslovakia uses Merino and hybrid sheep to intensively fatten lambs. Generally, the lambs were weaned after 3 days of lactation, then fed with artificial milk on the 4th day, and then fed with artificial milk and cultivated forage grass after 18 days, or mixed semen plus forage grass after 18 days. when the lambs were fattened to 82 days old, the body weight of lambs could reach 32 kg ~ 35 kg. Third, the advanced technology used in ewe reproduction lambs after weaning, the use of hormones to control ewe synchronous estrus and superovulation, simultaneous insemination, to improve the ewe conception rate and intensive lambing. 1. Synchronous estrus enables ewes to synchronize estrus within 1-2 days, which facilitates the organization of insemination, mating and lamb management. The sponge immersion solution vaginal insertion method, referred to as the vaginal sponge method, was used. Take progesterone 150-300 mg of water to make a suspension, then soak it with a sponge and stuff it into the depths of the ewe's vagina. After 14 days to 16 days, 500 units of pregnant horse serum were injected on the same day, and estrus mating was done 48 hours later. two。 Superovulation is the use of follicle-stimulating hormone to promote follicular development and maturity, and then luteinizing hormone to cause ovulation, referred to as superovulation. Generally, the sponge soaked with norethisterone 30mg is put into the vagina of ewes to induce ewe estrus. From the 11th day, 50 units of follicle stimulating hormone (FSH) were injected intramuscularly for 3 consecutive days, with a total of 150 units. On the 12th day, the sponge was taken out and 50 units of luteinizing hormone were injected intravenously every 48 hours. At the same time, the first insemination was performed, and the second insemination was performed the next day. Artificial insemination is usually done by cervical insemination. Fourth, cultivate new varieties and make use of heterosis 1. The extensive use of economic hybridization and heterosis is the basic way of fat lamb production and the best way to develop mutton production. In general, the cross of two varieties is 16.6% higher than that of purebred, and the hybridization of three varieties can be improved.