...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>British Poultry Science >Effect of dietary xylanase on energy, amino acid and mineral metabolism, and egg production and quality in laying hens
【24h】

Effect of dietary xylanase on energy, amino acid and mineral metabolism, and egg production and quality in laying hens

机译：日粮木聚糖酶对蛋鸡能量，氨基酸和矿物质代谢以及产蛋量和品质的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

1. The aim was to examine the effect of dietary xylanase on the availability of nutrients for laying hens when fed on wheat-rye-soy-based diets. The basal diet was formulated to contain 11 center dot 03 MJ/kg apparent metabolisable energy (AME), and the experimental diets were formulated by supplementing the basal diet with four different activities of xylanase (400, 800, 1200 and 1600 xylanase units (XU)/kg). 2. The AME and nitrogen metabolisability coefficients of xylanase-supplemented diets were 1 center dot 2% and 7 center dot 1%, respectively, greater than in the control diet. 3. Supplementary xylanase significantly improved the coefficients of metabolisability of indispensable, dispensable and total amino acids by 8 center dot 2%, 6 center dot 9% and 7 center dot 8%, respectively, and led to a significantly linear response of total amino acid metabolisability coefficient to xylanase. There was a range of effects within the indispensable amino acids with xylanase supplementation (1600 XU/kg) significantly improving the metabolisability of threonine by 4 center dot 9%, but having no have effect on lysine. The response of total amino acid retention to added xylanase was a significant quadratic function and suggests that 800 XU/kg is the optimum supplementary dosage. 4. Supplementary xylanase significantly improved sulphur metabolisability in a linear fashion to a maximum of 2 center dot 3% higher than that of the control diet. In terms of daily retention, most of the minerals responded in a quadratic manner to dietary xylanase, as the suggested optimal supplementary level was between 800 and 1200 XU/kg. 5. The yolk colour of the birds receiving 1200 and 1600 XU/kg was 0 center dot 33 and 0 center dot 28 units (Roche score); these were 4 center dot 1% and 3 center dot 5%, respectively, darker than the yolk of the birds given the control diet. 6. Birds receiving xylanase had a significantly higher weight gain than those fed on the unsupplemented diet. Feed intake, the number of eggs per hen per d, dirty and cracked eggs, and feed conversion ratio for egg production were not affected by xylanase. These data suggest that use of a xylanase may improve the metabolisability of many nutrients, but that such effects may not always benefit production parameters.
机译：1.目的是研究日粮木聚糖酶对以小麦-黑麦-大豆为主的日粮饲喂的蛋鸡营养物质的有效性。基础日粮的配方中包含11个中心点03 MJ / kg表观代谢能（AME），实验日粮通过在基础日粮中补充四种不同活性的木聚糖酶（400、800、1200和1600木聚糖酶单位（XU） ）/公斤）。 2.补充木聚糖酶的日粮的AME和氮代谢系数分别比对照日粮高1个中心点2％和7个中心点1％。 3.补充木聚糖酶可分别将8个中心点2％，6个中心点9％和7个中心点8％的可分配氨基酸，不可分配氨基酸和总氨基酸的代谢系数显着提高，并导致总氨基酸的显着线性响应木聚糖酶的代谢系数。补充木聚糖酶（1600 XU / kg）在必不可少的氨基酸范围内有一系列作用，可将苏氨酸的代谢能力显着提高4个中心点9％，但对赖氨酸没有作用。总氨基酸保留对添加的木聚糖酶的响应是一个重要的二次函数，表明800 XU / kg是最佳补充剂量。 4.补充木聚糖酶以线性方式显着改善了硫的代谢能力，最大比对照饮食高2个中心点3％。在日常保留方面，大多数矿物质对膳食木聚糖酶的响应呈二次方关系，因为建议的最佳补充水平为800至1200 XU / kg。 5.接受1200和1600 XU / kg的鸟的蛋黄颜色为0个中心点33和0个中心点28个单位（罗氏评分）;它们分别是4个中心点1％和3个中心点5％，比对照饮食的蛋黄深。 6.接受木聚糖酶的家禽的体重增加明显高于未补充饮食的家禽。木聚糖酶不影响采食量，每只母鸡每天的卵数，肮脏和破裂的卵以及产蛋的饲料转化率。这些数据表明，木聚糖酶的使用可以改善许多营养素的代谢能力，但是这种作用可能并不总是有益于生产参数。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号