| In recent years, mutton has been gradually increased in the meetfood. The price of mutton is higher and higher. The developed countries in the west meet their chimax in meat sheep raising. On the contrary, the sheep wool and cashmere products decreased continously in the world. Sheep raising tends to be cleve lopted well in the future. China is an important argriculture country.Livestock farming is develpted quickly. Under the conditions of having more people but less land, food saving sheep raising is focused. In addition, with the mutton price going higher, meat sheep proclucing in china is developing rapidly. Because for a long period of time, the ways of meat sheep producing fall behind, and the producing level of it is low furthermore, it is also lack of science and technology investment, The improvement of meat sheep breed is far beyard what is expected. In consequence, the amount of mutton per person in China is far behind what in the developted countries.YuLin, located in the north of Shaan Xi provice, has very good natural conditions with rich earth resources, large area of praire, and rainpait grasses and feeding stuff. In recent years, with the development of leading agricultural products and special products advocated by the party committe in YuLin and Yulin government, four major products namely sheep grass, Chinese dates. potato and cultivation model projects are being started. Sheep product, especially mutton products is faster than before, but in general, the level of the meat sheep breeding is low and its economic profit is not good at all. So it can't be a leading industry is the rual area.The paper studies several sheep farms in experiments, so as to improve the barn sheep feeding pattern, and corresponding comprehensive fercilities and develop the sheep raising Skills. The study shows that the ADG of Suffolk-Han Yang F1, hybridded from the Suffolk and Han Yang. And Tao-Han, hybridded from the Dorset Down and HanYang are higher than local Mongolian sheep. The difference is sharp(p<0.05). Accrding to the cost of the ADG of sheep feeding, the income of the Suffold-Han Yang F1 and Tao-Han F1, per sheep is 21.58 yuan and 22.22 yuan more (p<0.05) .Through the contrast study, dfferent way of sheep raising can apparently influence the weight increasing, body and chemical form of the sheep.The weight increasing daily is higher in barn feeding sheep than in herding sheep (P<0.01). Daily increasing weight, carcass weight dressing percent and the meat percentage of the barn feeding sheep is higher than that of herding sheep. In addition, meat fiber fat and meat quality in barn feeding sheep are better than in herding sheep. The profit gain from the former one is higher than from the latter one. The paper shows, in Corres pondence with the sheep feeding stuff and the economy development situation in YuLin, after the contrast study, sheep feeding stuff made according to 90% NRC is better than that according to 100 NRC and 80% NRC Standard. So 90%NRC is the sheep feeding stuff making standard locally. Through the Study and obervation, lucerne is a good grass to feed the sheep, but the cost of it is high , So it should be less than 30% daily.Thanks to this study, meat sheep feeding model area should be set up in YuLin area, more and more Dorest Down, Suffolk Han Yang Fi and F2 should be feed. Accordingly, the meat sheep farming can be developed in the ruval area, the science technology and technies, artifical inseminationg and embryonic implantation, for example, should be eventually, spreaded as well. The excellent surnames should be used widely. So as to develop the meat sheep product in YuLin. |
