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Second, artificial control of ewes breeding. Manual control of ewes breeding mainly includes techniques such as induction of estrus and estrus in the same period, reduction of ewes' empty space, timely breeding of abortions, and shortening of breeding cycles. For unexplored estrus or missed estrus, the use of medroxyprogesterone 40-60 mg, progesterone 150-250 mg, 18-methylenolone 30-40 mg, and progesterone 30-60 mg can be used as a suspension. Dip the liquid with sponge and stuff it into the ewe's cervix and take it out 10-14 days. The day of injection is 400-750 units of pregnant horse serum. After 2-3 days, most of the ewes being treated can be used for breeding; or use the above medicines. One-fifth of the liquid is fed into the ewe and fed to the ewe. The drug is discarded after 12 to 14 days. The last oral injection of 400-750 units of pregnant horse serum on the same day can induce estrus mating at the same time in the ewes, facilitating the concentration of lambs and fattening.
Third, the implementation of lambs and premature weaning. The early weaning of lambs is actually controlling the feeding period of ewes, shortening the ewes' lambing intervals and controlling the breeding cycle, reaching two or three years of three-year-olds each year, which is an important technical measure for multiple births and prolificacy. Lamb early weaning methods are: First, the lamb is born about 1 week of age that is weaned, and then artificial breeding with milk replacer; Second, the lamb was born 45-50 days of age weaned, after weaning in addition to feeding high-quality green feed or grazing , appropriate supplements feed mixed concentrates. If lambs are weaned for 1 week, 30% of corn flour, 22% of wheat flour, 17% of fried soybean powder, 20% of skim milk powder, 4% of yeast powder, 4.5% of white sugar, 1.5% of calcium powder, 0.5% of salt Add 0.5% of elemental additive, 1-2 drops of cod liver oil, add 5-8 times of fresh water, mix evenly, and cook until cooked at 37°C instead of milk; 30 days later use corn flour 40%, wheat flour 25%, bean flour 15 %, milk powder 10%, bran 10%, yeast 3%, calcium powder 2%, salt 0.5%, trace element additive 0.5%, add water and stir evenly.
Fourth, timely grouping. The ewes with poor breeding ability are castrated in time, and the lambs that are not used for breeding are castrated in time. All fattening sheep should be kept separately from other sheep, and divided into groups according to age, individual size, male and female, etc. to ensure the best effect of fattening.
Fifth, timely deworming. The prevention of parasitic diseases is critical for the size of fattening sheep. The first use of levamisole in combination with abamectin (or ivermectin) to repel insects can remove 80% of parasites in vivo and in vitro. Secondly, special parasites such as Fasciola hepatica have to be specifically exterminated, and they can be sprayed with a 0.3% solution of veterinary trichlorfon in fine weather or sprayed with a 1:1000 dilution of amitraz at a concentration of 12.5%. At the same time, pest control should also be used to prevent epidemic diseases such as sheep disease, sheep aphthous disease, pleuropneumonia, and sheep epidemic.
Sixth, science fattening. According to different pasture resources, geographical conditions and seasons, the use of appropriate fattening methods can reduce costs and increase income. One is to do a good job of grazing management. Natural pastures, mountainous areas rich in pasture resources, hilly and mountainous areas, and grazing in agricultural and pastoral areas supplemented by artificial grazing land and autumn grazing land should be selected. When forage is flourishing, the fattening sheep are grazing for more than 8 hours a day, and generally do not need to feed the concentrate. Feeding 3-6 months for slaughter. The second is grazing plus feed fattening. That is, on the basis of grazing, feed grasses and mixes sooner or later, and when it enters the hay season, it is transferred to fattening. This method is applicable to later-intensity fattening of mutton sheep. According to the standards of broiler sheep feeding, it is sufficient to feed fodder for protein and minerals. In the general diet, roughage accounts for 60-70%, and concentrates account for 30-40%. Diet formula: 48.9% corn, 10% soybean cake, 30% wheat bran, rice bran, 10% distillers grains, 0.1% salt, 1% additives. Each day feeds 100-150 grams of mixture. Try to allow them to eat and drink freely, and don't add to it.
Seven, the application of sheep weighting agent (1) growth period and fattening period Each sheep daily sheep fattening compound feed additive 25-33 grams of mixed feeding. (2) 25-30 milligrams of monensin can be added per kilogram of the diet and fed evenly into the feed. (3) Add 10-20 milligrams of bacitracin zinc per kilogram of mixed feed to the lamb. (4) Feeding olaquindox 50-80 mg per kilogram diet. (5) Each sheep is fed with 10 grams of cattle and sheep (also known as urea phosphate) daily.
Eight, effective control of environmental conditions. The sheep-raising households should make every effort to improve the structure of the sheep house, improve the feeding environment, and implement protective breeding in accordance with the sheep's living habits. Sheep house is best to use the structure of the building, so that it does not leak water, not damp, no wind on the four walls, the summer can be planted in the sheep house and around the activity of vines plant cover shade heatstroke, in order to improve the sheep house climate, ensure winter Warm and cool in summer.
Nine, widely open up feed resources. The first is to use the sporadic land surrounding sheep houses for planting pastures and planting vine plants such as sweet potatoes and pumpkins; secondly, to use low-yield slopes, desertification lands, saline-alkali lands, natural pastures, etc., to make use of lands and winters, or to systematically draw out feed lands, During the growing period of forage grass, high-quality pastures such as alfalfa, clover and ryegrass are planted rationally; thirdly, straw, wheat straw and other crop straws are subjected to ammoniation, micro-storage and salinization to feed sheep, and green feed and tuber feeds are processed and processed. In order to prepare for the winter season, improve the utilization of feed and nutritional value.
Ten, timely slaughter. After the adult sheep grows to a certain weight, the growth rate is slowed down, and further fattening will not only increase the cost, but also affect the quality of the lamb. Therefore, the general sheep after the castration, the best fattening time in the 30-40 days benefit; for growing sheep, lamb fattening time of about 6 months, local sheep fattening weight can reach 20-25 kg, the weight of hybrid sheep fattening can be When reaching 25-30 kilograms, it can be slaughtered when the sensation reaches mid-range to ensure the ideal feed reward and carcass quality.
Technical measures to improve the economic benefits of sheep production
First, choose high-quality mutton sheep breeds. The variety and quality of mutton sheep have become the decisive factor in the market competition. Land, miscellaneous, and inferior mutton sheep often affect the benefits of sheep due to small individuals, poor meat quality, slow growth, and low slaughter rate. Therefore, sheep farms or sheep-raising households must adjust the structure of mutton sheep breeds and select the appropriate breed combination to achieve a binary or ternary hybrid sheep breeding system. At present, based on the resources of existing sheep breeds such as Xiaotailhan, Nanjiang Huangyang, Boer goats, Matou goats, Chengdu Ma sheep, etc., two-way hybrids or three-way hybrids should be widely carried out to gradually establish the corresponding sheep sheep fattening. system.