Energy utilization and growth performance of chickens fed novel wheat inbred lines selected for different pentosan levels with and without xylanase supplementation.
Energy utilization and growth performance of chickens fed novel wheat inbred lines selected for different pentosan levels with and without xylanase supplementation.
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DOI：
10.3382/ps/peu059
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发表时间：
2015-02
期刊：
影响因子：
4.4
通讯作者：
Lovegrove A
中科院分区：
文献类型：
--
作者：
Pirgozliev V;Rose SP;Pellny T;Amerah AM;Wickramasinghe M;Ulker M;Rakszegi M;Bedo Z;Shewry PR;Lovegrove A
以豫麦34 ×乌克兰的F5重组自交系为材料，在Rothamsted Research的同一个收获年度，在同一地点进行重复试验。收获来自这些品系的总共10个样品并用于肉鸡实验。20个营养完全的粉形式的饮食，有630克/公斤的小麦与不同量的戊聚糖，有和没有外源性木聚糖酶的补充，被用来比较肉仔鸡的生长性能，并确定表观代谢能校正氮潴留（AMEn）。研究了小麦样品的营养价值与其化学成分和品质检测结果之间的关系。总戊聚糖含量为36.7 ~ 48.0 g/kg DM，水溶性戊聚糖含量为6.7 ~ 11.6 g/kg DM。小麦样品的平均粗油和蛋白质含量分别为10.5和143.9 g/kg DM。运动粘度的平均测定值为0.0018 mPa.s，动力粘度的平均测定值为2.1 mPa.s。在所测试的10个小麦样品中，基于小麦的饮食的AMEn具有0.47 MJ/kg DM的最大范围。添加木聚糖酶显著提高了饲粮AMEn、干物质和脂肪消化率（P < 0.05）。小麦样品的离体运动粘度与总戊聚糖含量呈显著正相关（P < 0.05）。小麦中总戊聚糖含量与肉鸡生长性能呈负相关。每公斤小麦增加10克戊聚糖，日采食量和增重分别减少2.9克和3.5克（P < 0.001）。研究表明，小麦样品的戊聚糖含量可以用来预测其饲用品质。补充木聚糖酶提高了所有小麦样品的能量和养分利用率，这与戊聚糖含量的差异无关。
Different F5 recombinant inbred lines from the cross Yumai 34 × Ukrainka were grown in replicated trials on a single site in one harvest year at Rothamsted Research. A total of 10 samples from those lines were harvested and used in a broiler experiment. Twenty nutritionally complete meal-form diets that had 630 g/kg of wheat with different amounts of pentosan, with and without exogenous xylanase supplementation, were used to compare broiler growth performance and determine apparent metabolizable energy corrected for N retention (AMEn). We examined the relationship between the nutritive value of the wheat samples and their chemical compositions and results of quality tests. The amounts of total and water soluble pentosans in wheat samples ranged from 36.7 to 48.0 g/kg DM, and 6.7 to 11.6 g/kg DM, respectively. The mean crude oil and protein contents of the wheat samples were 10.5 and 143.9 g/kg DM, respectively. The average determined value for the kinematic viscosity was 0.0018 mPa.s, and 2.1 mPa.s for the dynamic viscosity. The AMEn of the wheat-based diets had a maximum range of 0.47 MJ/kg DM within the ten wheat samples that were tested. Xylanase supplementation improved (P < 0.05) dietary AMEn, dry matter, and fat digestibility coefficients. There was a positive (P < 0.05) relationship between in vitro kinematic viscosity of the wheat samples and the total pentosan content. There was a negative relationship between the total pentosan content in the wheat and broiler growth performance. An increase by 10 g of pentosan per kg of wheat reduced (P < 0.001) daily feed intake and weight gain by 2.9 g and 3.5 g, respectively. The study shows that the feeding quality of wheat samples can be predicted by their total pentosan content. Supplementary xylanase improved energy and nutrient availability of all wheat samples that was independent of differences in pentosan content.