Damron B L, Goodson-Williams R
Department of Poultry Science, University of Florida, Gainesville 32611.
Poult Sci. 1987 Jun;66(6):1001-6. doi: 10.3382/ps.0661001.
Three experiments were conducted to study the effect of a liquid methionine source supplied through the water on chick performance. Methionine at .025, .05, and .075% (Experiment 3, only) from the liquid source were added to the drinking water and compared with .05 and .075% (Experiment 2 and 3) dry methionine supplementation in a methionine-deficient basal. A dry DL-methionine was used for diet supplementation in Experiments 1 and 2, and both liquid and dry sources were used in Experiment 3. Day-old (Cobb) feather-sexed broiler chicks received these treatments for 3-week periods. Mortality was not significantly altered by any of the treatments. In two of the three experiments neither feed nor water intake was significantly affected by treatment. In Experiment 2, control birds consumed significantly less feed than other groups, and daily water intake of birds that received .05% supplemental feed methionine was elevated above that of other regimens. Fecal moisture and fecal sodium levels were not elevated above those measured from the unsupplemented basal. In all three studies comparable levels of methionine from feed or water supported equivalent body weights. Within the limits of these tests, liquid DL-methionine provided in the drinking water was effectively assimilated by broiler chicks and increased total methionine intake, which increased growth.
进行了三项试验，以研究通过饮水提供液态蛋氨酸来源对雏鸡生产性能的影响。将液态来源的蛋氨酸以0.025%、0.05%和0.075%（仅试验3）添加到饮水中，并与蛋氨酸缺乏基础日粮中添加0.05%和0.075%（试验2和3）的干蛋氨酸进行比较。试验1和2中使用干DL-蛋氨酸进行日粮补充，试验3中同时使用了液态和干态来源的蛋氨酸。1日龄（科宝）经羽毛鉴别性别的肉仔鸡接受这些处理为期3周。任何处理均未显著改变死亡率。在三项试验中的两项试验中，处理对采食量和饮水量均无显著影响。在试验2中，对照组鸡的采食量显著低于其他组，接受0.05%补充日粮蛋氨酸的鸡的日饮水量高于其他处理组。粪便湿度和粪便钠水平未高于未补充基础日粮组所测水平。在所有三项研究中，来自饲料或饮水的相当水平的蛋氨酸支持了相近的体重。在这些试验的范围内，饮水中提供的液态DL-蛋氨酸被肉仔鸡有效吸收，增加了总蛋氨酸摄入量，从而促进了生长。
