Ryu Myung H, Hosseindoust Abdolreza, Kim Jin S, Choi Yo H, Lee Su H, Kim Min J, Lee Jae H, Chae Byung J
Nong Hyup, Inc., Seoul, Republic of Korea.
College of Animal Life Sciences, Kangwon National University, Chuncheon, 24341, Republic of Korea.
J Poult Sci. 2017 Jul 25;54(3):212-217. doi: 10.2141/jpsa.0160021.
A trial was conducted to investigate the effects of dietary mannan level and -mannanase supplementation on egg production performance, nutrient retention and blood metabolites of laying hens. Two hundred and forty Hy-Line Brown layers (52 wk-old) were randomly allotted to 6 treatments on the basis of laying performance. Each treatment had 8 replicates with 5 birds (40 birds per treatment). Laying hens were fed low or high mannan diets containing 0, 0.4 or 0.8 g -mannanase/kg diet in a 2×3 factorial arrangement during 56 d feeding period. Laying hens fed diets supplemented with high -mannanase level had greater (<0.05) overall egg production, egg weight, egg mass, retention of gross energy, crude protein and mannan than hens fed the diets without -mannanase. Laying hens fed diets without -mannanase or supplemented with high -mannanase level had greater (<0.05) retention of dry matter than hens fed diets with low -mannanase level. Moreover, laying hens fed high mannan diets had higher (<0.05) feed intake and feed conversion ratio than that of hens fed low mannan diets. Furthermore, laying hens fed diets supplemented with a high level of -mannanase had increased serum glucose (<0.05) concentrations but these diets had no effect on total cholesterol, total protein or blood urea nitrogen. The results obtained in the present study indicate that a high mannan content in diets had adverse effect on the performance of laying hens and that dietary supplementation with -mannanase has the potential to improve laying hen performance and nutrient retention.
进行了一项试验，以研究日粮中甘露聚糖水平和添加甘露聚糖酶对蛋鸡产蛋性能、养分保留率及血液代谢物的影响。根据产蛋性能，将240只海兰褐蛋鸡（52周龄）随机分为6个处理组。每个处理组有8个重复，每个重复5只鸡（每个处理组共40只鸡）。在56天的饲喂期内，蛋鸡按照2×3析因设计，分别饲喂含0、0.4或0.8 g甘露聚糖酶/kg日粮的低或高甘露聚糖日粮。与未添加甘露聚糖酶的日粮组相比，添加高甘露聚糖酶水平日粮的蛋鸡总体产蛋量、蛋重、蛋重、总能、粗蛋白和甘露聚糖保留率更高（P<0.05）。未添加甘露聚糖酶或添加高甘露聚糖酶水平日粮的蛋鸡干物质保留率高于添加低甘露聚糖酶水平日粮的蛋鸡（P<0.05）。此外，饲喂高甘露聚糖日粮的蛋鸡采食量和饲料转化率高于饲喂低甘露聚糖日粮的蛋鸡（P<0.05）。此外，添加高水平甘露聚糖酶日粮的蛋鸡血清葡萄糖浓度升高（P<0.05），但这些日粮对总胆固醇、总蛋白或血尿素氮无影响。本研究结果表明，日粮中高含量的甘露聚糖对蛋鸡性能有不利影响，日粮添加甘露聚糖酶有改善蛋鸡性能和养分保留率的潜力。
