| 低磷饲粮中超量添加植酸酶对肉鸡生长性能、屠宰性能、消化器官指数、养分表观利用率及胫骨指标的影响 |
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| 引用本文： | 燕磊,吕尊周,李星晨,王萍,王正国,呙于明,许崇伟,周桂莲.低磷饲粮中超量添加植酸酶对肉鸡生长性能、屠宰性能、消化器官指数、养分表观利用率及胫骨指标的影响[J].动物营养学报,2022,34(2):865-876. |
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| 作者姓名： | 燕磊 吕尊周 李星晨 王萍 王正国 呙于明 许崇伟 周桂莲 |
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| 作者单位： | 山东新希望六和集团有限公司,青岛 266061;新希望六和股份有限公司,农业部饲料及畜禽产品质量安全控制重点实验室,成都 610101;莱阳六和饲料有限公司,莱阳 265200;山东新希望六和集团有限公司,青岛 266061;新希望六和股份有限公司,农业部饲料及畜禽产品质量安全控制重点实验室,成都 610101;中国农业大学动物科学技术学院,动物营养学国家重点实验室,北京 100193 |
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| 基金项目： | 山东省重点研发计划项目(2019JZZY020602);烟台市“双百计划”人才项目(烟办发[2019]16号);青岛市科技惠民示范引导专项(21-1-4-ny-16-nsh)。 |
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| 摘 要： | 本试验旨在研究低磷饲粮中超量添加植酸酶对肉鸡生长性能、屠宰性能、消化器官指数、养分表观利用率及胫骨指标的影响。选取1日龄罗斯308商品肉仔鸡公雏2 160只,随机分为5组,每组12个重复,每个重复36只。正对照组(PC组)饲喂基础饲粮,负对照组(NC组)饲喂低磷饲粮(钙和有效磷水平均比PC组降低0.15%),试验组在低磷饲粮的基础上分别添加500(NC500)、1 500(NC1500)和4 500 FTU/kg(NC4500)的植酸酶。试验期39 d。结果表明:1)NC和NC500组14、25和38日龄体重以及1~14日龄、15~25日龄和1~38日龄平均日增重(ADG)、平均日采食量(ADFI)、育肥指数显著低于PC组(P<0.05)。除NC4500组1~38日龄ADFI显著高于PC组(P<0.05)外,NC1500和NC4500组38日龄体重以及1~38日龄ADG、ADFI、育肥指数与PC组差异不显著(P>0.05)。2) NC组钙表观利用率显著低于PC组(P<0.05),NC500、NC1500和NC4500组日均排钙量显著低于PC组(P<0.05)。NC500、NC1500和NC4500组磷表观利用率显著高于NC和PC组(P<0.05),日均排磷量显著低于NC和PC组(P<0.05)。3)NC组胫骨强度显著低于其他各组(P<0.05),NC4500组胫骨强度显著高于其他各组(P<0.05)。4) NC组26、39日龄肝脏指数显著高于PC组(P<0.05),NC1500和NC4500组26日龄空肠、回肠指数显著低于PC和NC组(P<0.05),NC1500和NC4500组39日龄肝脏、胰腺、十二指肠、空肠指数显著低于NC组(P<0.05)。5) NC组全净膛率、腿率均显著低于PC组(P<0.05),NC1500和NC4500组全净膛率显著高于NC组(P <0.05),NC500、NC1500和NC4500组腿率显著高于NC组(P<0.05)。6)与PC组相比,NC1500、NC4500组每只鸡收益分别增加了0.61、0.49元。由此可见,本试验条件下,低磷饲粮中超量添加植酸酶能改善肉鸡生长性能、屠宰性能,提高钙、磷利用率及胫骨强度,提高经济效益,其中植酸酶适宜添加量为4 500 FTU/kg。
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| 关 键 词： | 植酸酶 生长性能 屠宰性能 肠道发育 养分表观利用率 |
Effects of Excessive Phytase Supplementation in Low Phosphorus Diet on Growth Performance,Slaughter Performance,Digestive Organ Indexes,Nutrient Apparent Utilization Rates and Tibial Indexes of Broilers |
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| YAN Lei,LYU Zunzhou,LI Xingchen,WANG Ping,WANG Zhengguo,GUO Yuming,XU Chongwei,ZHOU Guilian.Effects of Excessive Phytase Supplementation in Low Phosphorus Diet on Growth Performance,Slaughter Performance,Digestive Organ Indexes,Nutrient Apparent Utilization Rates and Tibial Indexes of Broilers[J].Acta Zoonutrimenta Sinica,2022,34(2):865-876. |
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| Authors: | YAN Lei LYU Zunzhou LI Xingchen WANG Ping WANG Zhengguo GUO Yuming XU Chongwei ZHOU Guilian |
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| Institution: | (Shandong New Hope Liuhe Group Co.,Ltd.,Qingdao 266061,China;Key Laboratory of Quality Control for Feed and Products of Livestock and Poultry,Ministry of Agriculture,New Hope Liuhe Group Co.,Ltd.,Chengdu 610101,China;Laiyang Liuhe Feed Co.,Ltd.,Laiyang 265200,China;State Key Laboratory of Animal Nutrition,College of Animal Science and Technology,China Agricultural University,Beijing 100193,China) |
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| Abstract: | The purpose of this experiment was to study the effects of excessive phytase supplementation in low phosphorus diet on growth performance,slaughter performance,digestive organ indexes,nutrient apparent utilization rates and tibial indexes of broilers. A total of 2 160 one-day-old Ross 308 commercial male broiler chickens were randomly divided into 5 groups with 12 replicates per group and 36 birds per replicate. Broilers in the positive control group(PC group)were fed a basal diet,broilers in the negative control group(NC group)were fed a low phosphorus diet(the calcium and available phosphorus levels were 0.15% lower than those in PC group),and others in experimental groups were fed low phosphorus diets supplemented with 500(NC500 group),1 500(NC1500 group)and 4 500 FTU/kg(NC4500 group)phytase,respectively. The experiment lasted for 39 days. The results showed as follows:1)the body weight at 14,25 and 38 days of age and the average daily gain(ADG),average daily feed intake(ADFI)and fattening index during 1 to 14 days of age,15 to 25 days of age and 1 to 38 days of age of NC and NC500 groups were significantly lower than those of PC group(P<0.05). Except the ADFI during 1 to 38 days of age of NC4500 group was significantly higher than that of PC group(P<0.05),the body weight at 38 days of age and the ADG,ADFI and fattening index during 1 to 38 days of age of NC1500 and NC4500 groups were no significant difference compared with PC group(P>0.05). 2)The calcium apparent utilization rate of NC group was significantly lower than that of PC group(P<0.05),and the average daily calcium excretion of NC500,NC1500 and NC4500 groups was significantly lower than that of PC group(P < 0. 05). The phosphorus apparent utilization rate of NC500,NC1500 and NC4500 groups was significantly higher than that of NC and PC groups(P<0.05),and the average daily phosphorus excretion was significantly lower than that of NC and PC groups(P<0.05). 3)The tibial strength of NC group was significantly lower than that of other groups(P<0.05),and the tibial strength of NC4500 group was significantly higher than that of other groups(P<0.05). 4)The liver index at 26 and 39 days of age of NC group was significantly higher than that of PC group(P<0.05),the jejunum and ileum indexes at 26 days of age of NC1500 and NC4500 groups were significantly higher than those of PC and NC groups(P<0.05),and the liver,pancreas,duodenum,jejunum indexes at 39 days of age of NC1500 and NC4500 groups were significantly higher than those of NC group(P<0.05). 5)The percentage of eviscerated yield and percentage of legs of NC group were significantly lower than those of PC group(P<0.05),the percentage of eviscerated yield of NC1500 and NC4500 groups was significantly higher than that of NC group(P<0.05),and the percentage of legs of NC500,NC1500 and NC4500 groups was significantly higher than that of NC group(P<0.05). 6)Compared with PC group,the economic benefit per chicken of NC1500 and NC4500 groups increased by 0.61 and 0.49 Yuan,respectively. In conclusion,under this experiment condition,the excessive phytase supplementation in low phosphorus diet can improve the growth performance and slaughter performance of broilers,improve the utilization rates of calcium and phosphorus and tibia strength,and improve economic benefits,and the suitable addition of phytase is 4 500 FTU/kg.Chinese Journal of Animal Nutrition,2022,34(2):865-876] |
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| Keywords: | phytase growth performance slaughter performance intestinal development nutrient apparent utilization rates |
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