| 摘要: |
| 为研究木聚糖酶对肉仔鸡不同类型日粮的代谢能值的影响,将细菌性内切木聚糖酶,酶A,活性5 000 IU/g和活性各为2 500 IU/g的真菌性外切糖酶和细菌性内切酶的复合木聚糖酶,酶B,分别添加到代谢能为12.13MJ/kg的6种类型日粮中,试验结果表明:在肉仔鸡1~3周龄,酶A显著提高玉米豆粕棉粕和玉米小麦豆粕菜粕型日粮的表观代谢能(AME)和真代谢能(TME),酶B显著提高除玉米小麦豆粕型日粮外其他类型日粮的AME与TME(P<0.05)。在肉仔鸡4~6周龄,2种木聚糖酶都提高了玉米小麦豆粕和玉米小麦豆粕棉粕型日粮的AME和TME(P<0.10)。前期,酶A在玉米豆粕棉粕和玉米小麦豆粕菜粕型日粮中效果显著,1 000 IU酶A代谢能0.62~0.68 MJ/kg,酶B在除玉米小麦豆粕型日粮外的其他类型日粮中效果均显著,1 000 IU的代谢能为0.41~2.01 MJ/kg;后期,2种木聚糖酶在玉米小麦豆粕和玉米小麦豆粕棉粕型日粮中效果显著,1 000 IU酶A的代谢能为0.34~0.53 MJ/kg,1 000 IU酶B的代谢能为0.38~0.54 MJ/kg。 |
| 关键词: 木聚糖酶,肉仔鸡,表观代谢能,真代谢能,代谢能 |
| DOI：10.11841/j.issn.1007-4333.2006.06.151 |
| 投稿时间：2006-03-22 |
| 基金项目: |
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| Effects of xylanases on the metabolizable energy of broiler diets |
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| Abstract: |
| The experiment was carried out to determine the metabolizable energy value of two xylanase enzymes in six different diets of broiler chickens.Xylanase A(bacterial xylanase with activities of 5?000?IU/g) and B(bacterial xylanase with activities of 2?500?IU/g;fungal xylanase with activities of 2?500?IU/g) were added the six diets.At the age of 3 weeks,xylanase A increased the apparent and true metabolizable energy(AME and TME) of Corn-Cottonseed meal-based and Wheat-Rapeseed meal-based diet(P<0.05).Xylanase B increased the AME and TME of diets except for Wheat-Soybean meal-based diet(P<0.05).At the age of 6 weeks,xylanase A and B increased the AME and TME of Wheat-Soybean mealbased and Wheat-Cottonseed meal-based diet(P<0.10).During the period of 16-20 days,the metabolizable energy equivalent value of xylanase A 1?000?IU was between ME 0.62 and 0.68?MJ/kg in Corn-Cottonseed meal-based and Wheat-Rapeseed meal-based diets and that of xylanase B 1?000?IU was between ME 0.41 and 2.01?MJ/kg except for Wheat-Soybean meal-based diet.During the period of 37-41?days,the metabolizable energy equivalent value of xylanase A 1?000?IU was between ME 0.34 and 0.53?MJ/kg and that of xylanase B 1?000?IU was between ME 0.38 and 0.54?MJ/kg in Wheat-Soybean meal-based and Wheat-Cottonseed meal-based diets. |
| Key words: xylanase,broiler,AME,TME,metabolizable energy |
