0—4周龄京红蛋鸡饲粮蛋氨酸需要量研究  

Studies on Dietary Methionine Requirement of Jinghong Laying Hens from Hatch to the Age of 4 Weeks

作　　者：宋丹[1,2] 岳洪源[2] 陈秀丽[1,2] 李连彬[1,2] 高玉鹏[1] 武书庚[2] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100 [2]中国农业科学院饲料研究所/生物饲料开发国家工程研究中心,北京100081

出　　处：《中国农业科学》2014年第12期2446-2454,共9页Scientia Agricultura Sinica

基　　金：国家科技支撑计划(2011BAD26B03);现代农业产业技术体系(CARS-41-K13);现代农业产业技术体系北京市家禽创新团队(CARS-PSTP)

摘　　要：【目的】研究中国新培育的京红蛋鸡(0—4周龄)饲粮蛋氨酸需要量。【方法】选取300只体重相近、健康的1日龄京红蛋鸡,采用单因素完全随机试验设计,随机分5个处理,饲粮蛋氨酸水平分别为0.2%、0.3%、0.4%、0.5%和0.6%,每处理5个重复,每重复12只鸡。试期28 d。在14 d随机从每个重复选2只鸡空腹12 h屠宰,取胸腺、脾脏和法氏囊,计算免疫指数;在28 d随机从每个重复选2只鸡空腹12 h屠宰,分别取免疫和消化器官,计算相应指数。【结果】(1)饲粮蛋氨酸水平未见显著影响雏鸡采食量(P>0.05),但显著影响其增重(P<0.05),其中0.4%Met组鸡增重最大,且该组雏鸡ADG为8.31 g·d-1,显著高于0.2%、0.5%和0.6%Met组(P<0.05),且呈二次曲线升高趋势;显著影响料重比(P<0.05),其中0.5%Met组最佳(2.13﹕1),显著低于0.2%和0.3%Met组(P<0.05),呈二次曲线趋势降低;显著影响体重,且呈现二次曲线升高,0.4%Met组体重为268.70g,显著高于0.2%、0.5%和0.6%Met组(P<0.05);群体均匀度也呈现二次曲线升高,0.5%Met组最佳(85.19%),显著高于其它处理组(P>0.05)。(2)14 d,饲粮蛋氨酸水平未显著影响雏鸡胸腺指数和法氏囊指数(P>0.05),显著影响脾脏指数(P<0.05),0.4%Met组最大;28 d,鸡胸腺、脾脏和法氏囊指数均随饲粮Met水平呈显著正相关关系(P<0.05),且呈先升后降的趋势。其中,0.4%Met组脾脏和法氏囊指数最大,0.5%Met组胸腺指数最大。(3)饲粮Met水平未显著影响胰腺指数和十二指肠相对长度(P>0.05),显著影响蛋鸡十二指肠、空肠和回肠重量指数和空肠回肠长度指数(P<0.05)。随饲粮蛋氨酸水平升高,胰腺指数呈先升后降趋势,十二指肠、空肠和回肠重量指数和空肠、回肠长度指数均呈先降后升趋势。0.3%Met组十二指肠指数显著低于0.2%、0.5%和0.6%Met组(P<0.05);0.4%Met组的空肠指数显著低于其他Met组(P<0.05),0.5%Met组的空肠相对长度显著低于0.2%、0.3%和0.6%Met组(P<0.05);0.4%M【Objective】Dietary methionine（Met） levels for China＇s new cultivation of Jinghong laying hens from hatch to the age of 4 weeks were studied.【Method】The trial had adopted one-factor completely random design. Three hundred 1-day-old Jinghong laying hens from a commercial supplier in YuKou poultry were randomly allotted to 5 dietary treatment groups, and the birds in the treatment groups were fed a diet with different dietary methionine levels, respectively, i.e. 0.2%（0.2% Met）, 0.3%（0.3% Met）, 0.4%（0.4% Met）, 0.5%（0.5% Met） and 0.6%（0.6% Met）. Each treatment group consisted of 5 replicates with 5 pens per replicate and 12 birds per pen. The experiment lasted for 28 days. On 14th day, after being deprived of feed for 12 h, 2 birds selected randomly from each pen were slaughtered by neck cut and birds were eviscerated manually. The thymus, spleen and bursa of fabricius were weighed and were expressed as a percentage relative to live BW at processing. On 28th day, after being deprived of feed for 12 h, 2 birds selected randomly from each pen were slaughtered by neck cut and birds were eviscerated manually. The immune organs and digestive organs were weighed and were expressed as a percentage relative to live BW at processing.【Result】No significant differences were found in average daily feed intake（P0.05）, but the average daily gain was significantly different（P0.05）, and the birds in 0.4% Met group showed the maximum value with 8.31 g·d-1 and significantly higher than 0.2%, 0.5% and 0.6% Met groups（P0.05）, with a quadratic curve of a rising trend. Besides, feed/gain ratios were also significantly affected（P0.05）, and the 0.5% Met group was the best（2.13：1） and significantly lower than 0.2% and 0.3% Met groups（P0.05）, with a quadratic curve of reducing trend. Body weight was significantly affected（P0.05）, and the 0.4% Met group was the best（268.70 g） and significantly higher than 0.2%, 0.5% and 0.6% Met groups（P0.05）, with a quadratic curve o

关 键 词：饲粮 蛋氨酸 京红蛋鸡 生长发育 器官发育 

分 类 号：S831.5[农业科学—畜牧学]