中国畜牧杂志2017，Vol.53Issue(11)：61-65,5.DOI:10.19556/j.0258-7033.2017-11-061
低能日粮中添加β-甘露聚糖酶对肉仔鸡生长性能及养分表观消化率的影响
Effects of β-mannanase on Growth Performance and Apparent Nutrient Digestibility of Broilers Fed with Low Energy Diets
赵娜 1韩苗苗 1龚利敏 1杨文军 1夏添 1吴卉 1张丽英1
作者信息
- 1. 中国农业大学,动物营养学国家重点实验室,农业部饲料安全与生物学效价重点实验室,北京100193
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摘要
Abstract
An experiment was designed to study the effects ofβ-mannanase (CTCzyme) on growth performance and nutrient digestibility in broiler chickens fed with low energy corn soybean meal diets.A total of 648,one-day-old,male Arbor Acres broiler chicks were purchased and randomly allocated to six treatments with six replicates of eighteen chicks each.The experiment lasted 42 days which divided into starting phase (0～21 d) and finishing phase (22～42 d).The trial basal diet was corn-soybean meal diet.The chickens were fed with high energy diets (metabolizable energy (ME)12.55 MJ/kg (starter) and 12.97 MJ/kg (finisher)),low energy control diets (ME12.13 MJ/kg (starter) and 12.55 MJ/kg (finisher)),and low energy control diets supplemented β-mannanase 300,400,500 and 1 000 mg/kg,respectively.The results indicated that during 22～42 d and 0～42 d,the average daily gain (ADG) and feed conversion ratio (F/G) significantly (P＜0.05) and linearly (P＜0.05) improved and decreased in chickens fed with diets supplementedβ-mannanase 500 and 1 000 mg/kg in low energy diets,compared with low energy control diet group.Compared with high energy diet group,digestibility of dry matter,crude protein and gross energy had no significant differences in birds fed withβ-mannanase 500 and 1 000 mg/kg in low energy diets (P＞0.05).Moreover,digestibility of crude protein was linearly (P=0.04) increased with the increasing dosage ofβ-mannanase.The appropriate addition amount ofβ-mannanase was 529.5 and 503.2 mg/kg,based on singleslope polyline model of ADG and F/G during all period,respectively.Integrating the growth performance and nutrient digestibility,the optimum dosage ofβ-mannanase in broiler corn-soybean meal diets was 500 mg/kg.关键词
β-甘露聚糖酶/低能日粮/生长性能/养分消化率/肉仔鸡Key words
β-Mannanase/Low Energy diet/Growth performance/Nutrient digestibility/Broiler分类
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赵娜,韩苗苗,龚利敏,杨文军,夏添,吴卉,张丽英..低能日粮中添加β-甘露聚糖酶对肉仔鸡生长性能及养分表观消化率的影响[J].中国畜牧杂志,2017,53(11):61-65,5.
