小麦戊聚糖在肉鸡日粮中的抗营养活性。

Anti-nutritive activity of wheat pentosans in broiler diets.

Choct M, Annison G

Department of Animal Science, University of Sydney, Camden, N.S.W., Australia.

Br Poult Sci. 1990 Dec;31(4):811-21. doi: 10.1080/00071669008417312.

Abstract

To assess their possible anti-nutritive activity wheat pentosans were isolated from a milling by-product and added at graded levels to a sorghum-based broiler chicken diet. 2. A water-insoluble pentosan preparation (WIP, 720 g arabinoxylan/kg) caused a depression of apparent metabolisable energy (AME) of 1.63 MJ/kg DM at the highest level of inclusion (41.9 g/kg). Broilers maintained on this diet showed significant growth depression and a decrease in feed conversion efficiency. 3. A water-soluble pentosan preparation (WSP, 520 g arabinoxylan/kg) showed less anti-nutritive activity. 4. In a second experiment the AME of rice (pearled), maize, sorghum, wheat, triticale, barley and rye was determined. The AME values obtained were highly correlated (r = -0.98, P less than 0.001) with the summed levels of pentosans and beta-glucans found in the cereals. 5. It was concluded that the pentosans of wheat possess anti-nutritive activity when present in broiler diets and that similar polysaccharides may influence the nutritive value of other cereals.

摘要

为评估小麦戊聚糖可能的抗营养活性，从小麦制粉副产物中分离出戊聚糖，并以不同添加水平添加到以高粱为基础的肉鸡日粮中。2. 一种水不溶性戊聚糖制剂（WIP，720克阿拉伯木聚糖/千克）在最高添加水平（41.9克/千克）时，导致表观代谢能（AME）降低1.63兆焦/千克干物质。采食该日粮的肉鸡生长显著受阻，饲料转化效率降低。3. 一种水溶性戊聚糖制剂（WSP，520克阿拉伯木聚糖/千克）显示出较低的抗营养活性。4. 在第二个实验中，测定了大米（精米）、玉米、高粱、小麦、小黑麦、大麦和黑麦的AME。所得AME值与谷物中戊聚糖和β-葡聚糖的总含量高度相关（r = -0.98，P小于0.001）。5. 得出的结论是，小麦戊聚糖在肉鸡日粮中存在时具有抗营养活性，并且类似的多糖可能会影响其他谷物的营养价值。