Sheep fattening methods can be divided into grazing, fattening, fattening and fattening. 1. Grazing and fattening This is the most economical method of fattening and is the most common method of application. Grazing and fattening mainly uses the characteristics of rich pasture resources in summer and autumn to carry out grazing, but grazing and fattening should master scientific grazing techniques, put sheep well, manage sheep, eat sheep, eat well, and eat quickly. Sheep that are normally grazing and fattening can increase their body weight by 10-20 kg in summer and autumn. For example, the sheep of the tailstock of the Wen'an Plain in Hebei Province is grazing and fattening the sheep of the small-tailed Han sheep, and the average daily weight gain is 188 grams for the 90-day fattening period. The average weight gain during the fattening period is 17.82 kg, and the maximum is 22 thousand; the daily weight gain of the old and female ewes can be increased by grazing and fattening. 116 grams, the average weight gain during the fattening period was 10.4 kg. In order to improve the effect of grazing and fattening, ewes should be arranged to produce early spring lambs (at the end of February and early March) so that after weaning, the lambs are in the grassy stage and can fully utilize summer and autumn forage resources, timely fattening and timely slaughter. According to the Ximeng East Ukrainian flag test, early spring lambs (at the end of February) produced 2.75 kilograms more net meat than late spring lambs (at the end of March). 2. Mixed fattening The fattening is divided into grazing plus supplementary feeding and grazing plus feeding. The grazing plus supplementation and fattening technology is based on grazing, supplemented by feeding, making full use of local agricultural and sideline products, giving priority to short-term excellent feeding, speeding up the turnover of the sheep industry, and raising the output value. Grazing and home-batch fattening refers to the practice of short-term house feeding for sheep that have not yet taken care of grasshoppers, especially lambs with a large weight-gaining potential, after the end of the fall to increase the weight gain and achieve fattening effect. Tang Daoli et al. (1990) reported that 20 kg or more rams were grazing plus supplementary fattening, lambs were grazing and supplemented with 0.25 kg of mixed concentrates each day, and the mixed concentrate formula was corn 40% bran 20% flax cake 33% beancake 5% salt 0.5%, nutrient 1.5%. During the 60-day fattening period, the average weight of lambs in the experimental group was 8.67 kg higher than that of the control group (pure grazing). The average daily weight gain of the experimental group was 197.2 grams, while that of the control group was 52.7 grams. The difference between the two groups was 144.5 grams. From the results of slaughter determination, the average carcass weight of the experimental group was 5.62 kg higher than that of the control group, and the slaughter rate was 5.54% higher. Analysis of economic benefits, grazing plus supplementary fattening, can only increase the net benefit of 29.60 yuan. The 6-7 month old Guizhou white goat ram and ram were grazing supplemented with fattening. The mutton sheep group was supplemented with 250 grams of mixed concentrate on the basis of grazing (mixed concentrates consisted of corn, bran, rapeseed cake, shell powder, and salt). The nutrient concentration was 0.868 kg of dry matter per kg of air-dried diet, digestive energy 13.48 megajoules, crude protein 106.2 digestible protein 12.24% gram, supplemented for 60-75 days, the body weight increased by 27.22 kg from 18.22 kg at the beginning of the test, and the daily weight gain was 64.74 g, which was an average increase over the same age grazing and fattening mutton weight At 9.96 kg, the daily gain increased by 64.74, and the trial also showed that the fattening of the lambs is lower cost and higher profit than that of the rams, and the flesh of the lambs produced by the fattening of the lambs is light. 3. Little or no grazing in the grazing places The farming areas in the land are suitable for housing and fattening, taking full advantage of local agricultural and sideline products, and taking specialized and intensive sheep production roads. During the combined fattening, it is required that the feed nutrition be rich, comprehensive, good palatability, and full price protein With high energy, it is necessary to feed all kinds of essential minerals and trace elements to meet the growth needs of the sheep and to maximize its potential for production. Heze District Animal Husbandry and Veterinary Station Wang Jingyuan 1988 Small-tailed sheep, 4 months of age The lambs were subjected to different nutrient standard fattening experiments.The results of the fattening effect and economic efficiency of different fattening methods (fed-finishing, semi-fattening, fattening, grazing, and fattening) and the effect of the temperature of the livestock house on the fattening effect were made by Rao Shaoqi of the Beijing Academy of Agricultural Sciences. Experimental study China Agricultural Network Editor
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