Damron B L, Flunker L K
Department of Poultry Science, University of Florida, Gainesville 32611-0930.
Poult Sci. 1992 Oct;71(10):1695-9. doi: 10.3382/ps.0711695.
Two experiments were conducted to study the effects on chick performance of a commercially available liquid methionine analog [2-hydroxy-4 (methylthio) butanoic acid; HMB] supplied through drinking water. Methionine activities of .025 and .05% were added to drinking water and compared with levels of .03, .06, or .09% included in a low-methionine basal diet from 0 to 21 days of age. Mortality was not significantly altered by any dietary treatment. Neither feed nor water intake was affected adversely by HMB inclusion in drinking water. Only male body weight in Experiment 1 did not respond to HMB feed supplementation. Equivalent levels of total sulfur amino acid intake among water treatments were associated with significantly heavier body weights than the control. In both experiments, body weight and feed efficiency of birds receiving .05% methionine activity as HMB in water were equal or superior to those of groups that received supplemented feed. The results indicate that, under the study conditions, HMB provided in drinking water can be effectively assimilated by broiler chicks, at least through 21 days of age.
进行了两项试验，以研究通过饮水提供的市售液态蛋氨酸类似物[2-羟基-4（甲硫基）丁酸；HMB]对雏鸡生产性能的影响。在0至21日龄期间，将0.025%和0.05%的蛋氨酸活性添加到饮水中，并与低蛋氨酸基础日粮中所含的0.03%、0.06%或0.09%的水平进行比较。任何日粮处理均未显著改变死亡率。饮水中添加HMB对采食量和饮水量均无不利影响。仅试验1中的雄性体重对HMB饲料补充无反应。饮水处理间总含硫氨基酸摄入量相当，其体重显著高于对照组。在两项试验中，饮水中以HMB形式提供0.05%蛋氨酸活性的鸡的体重和饲料效率均等于或优于补充饲料组。结果表明，在本研究条件下，饮水中提供的HMB至少在21日龄前能被肉仔鸡有效吸收。
