Improving the growth rate of livestock and poultry, feed conversion efficiency and lean meat rate, improving carcass quality is expected by the majority of farmers, and is also the main target of livestock production. To this end, many years of animal husbandry science and technology workers have tried a variety of methods, such as adding high copper, antibiotics, B-stimulant and injection of growth hormone in the feed, but there are environmental pollution, drug residues, harm to human health and other issues. Cysteamine is a metabolite of cysteine ​​in animals and an important component of coenzyme A. Studies at home and abroad have shown that cysteamine can promote the synthesis and release of endogenous growth hormone in pigs by depleting somatostatin in pigs, enhance the physiological functions of the digestive tract, promote protein synthesis, inhibit fat synthesis, and significantly increase growth rate. And lean meat rate, significantly improve the carcass quality, and the pig's appearance can also be significantly improved: the rear hip is significantly larger, muscular, and the skin is red and shiny. Based on this principle, the author conducted this test. and methods 1.1 Test time and location The experiment was conducted from March 28 to May 12, 2009 at a large farm in Zhengyang County, Henan Province. 1.2 test animals and groups A total of 60 Du Changda ternary hybrid cultivars of lean meat type fattening pigs weighing approximately 60 kg were randomly divided into 2 groups, each group consisting of 3 replicates, and an interactive platform for pigs to communicate and learn. Repeat 10 for each. The control group was fed a basal diet, and the test group added 200 g of a bumper harvest of 50% cysteamine per ton of basal diet. The harvest was produced by Hangzhou Kangdequan Feed Co., Ltd., and the approval number was Zhejiang Feeding Prefix (2008) 158900. The pre-test period is 5 days and the trial period is 41 days. The test pigs were fed in limited quantities and were given free access to water. The composition and nutritional level of the basic diet are shown in Table 1. At the end of the feeding trial, 5 slaughters were selected from each group to determine the carcass quality. 2 test results 2.1 The effect of cysteamine on the growth performance of finishing pigs As can be seen from Table 2, the daily gain of the cysteamine group was increased by 3.05 u/o and the feed-to-weight ratio was decreased by 4.02% compared with the control group. During the test, there was a significant difference in the appearance of the cysteamine group and the control group. Compared with the control group, the cysteamine group had brighter hair, rosy skin and a flat and compact abdomen. What is more worth mentioning is that the cysts in the cysteamine group are fuller and muscular, and the gutter between the back sulcus and the lumbosacral region is more clear, and the growth uniformity is significantly better than the control group. 2.2 The effect of cysteamine on the carcass quality of finishing pigs As can be seen from Table 3, compared with the control group, the slaughter rate of the cysteamine group increased by 0.45 percentage points, the lean meat rate increased by 7.97 percentage points, and the fat percentage decreased by 4.75 percentage points. 2.3 Economic Benefits As can be seen from Table 4, compared with the control group, the unit weight gain cost of the cysteamine group increased by 0.07 兀, and the gain per kilogram gained more than 0.33 yuan. 3 summary Under the same breeding conditions, welcome to visit the pig farm power network http:// Feeding cysteamine-added diets can increase the daily weight gain of finishing pigs by 3.05%, the weight-to-weight ratio by 4.02%, the lean meat rate by 7.97 percentage points, the fat percentage by 4.75 percentage points, and the profit per kilogram by 0.33. yuan. Wpc Decking,Wpc Deck,Wood Plastic Composite Decking Barefoot Construction Material Co., Ltd. , http://www.qdwpcdecking.com