开填日龄对朗德鹅脂肪沉积和生长性能的影响  

Effects of Different Overfeeding Ages on Lipid Deposition and Growth Performance in Landes Geese

作　　者：龚绍明[1] 王惠影[1] 李光全 王贤泽 刘毅[1] 王翠[1] 杨云周[1] 何大乾[1] GONG Shaoming;WANG Huiying;LI Guangquan;WANG Xianze;LIU Yi;WANG Cui;YANG Yunzhou;HE Daqian(Institute of Animal Husbandry and Veterinary Science,Shanghai Academy of Agricultural Science,Shanghai 201106)

机构地区：[1]上海市农业科学院畜牧兽医研究所,上海201106

出　　处：《中国家禽》2022年第8期68-72,共5页China Poultry

基　　金：现代农业产业技术体系建设专项资金(CARS-42-35);上海市农业科学院攀高计划(PG21171);上海市农业科学院卓越团队建设计划(沪农科卓[2022]021)。

摘　　要：试验旨在研究不同开填日龄对朗德鹅脂肪沉积与生长性能的影响。试验选取同条件饲养的70和120日龄朗德鹅各60只作为研究对象,在相同条件下开展填饲试验,正式填饲至14 d时称量试验鹅体重,试验结束时取肝脏并测量各屠宰指标以及脂肪沉积能力。结果显示:①70日龄开填朗德鹅体重较120日龄开填朗德鹅低235.71 g,肝脏成熟时屠宰重基本接近,整个填饲期,70日龄开填朗德鹅增重与120日龄开填朗德鹅无显著差异。②70日龄和120日龄开填朗德鹅试验结束时肝重差异显著(P<0.05),但70日龄开填朗德鹅料肝比(26.18)显著低于120日龄朗德鹅(30.43)(P<0.05)。③脂肪沉积方面,70日龄和120日龄开填朗德鹅腹脂重及腹脂重占体增重比例无显著差异,但120日龄组朗德鹅的肠脂重占体增重比例显著高于70日龄组(P<0.05)。④70日龄开填朗德鹅屠宰后头重、小翅重、大翅重、肌胃重和鹅掌重与120日龄试验鹅差异不显著(P>0.05)。结果表明:70日龄开填朗德鹅肥肝重低于120日龄朗德鹅,但其填饲期增重多,料肝比也较低,具有更好的填饲效率。120日龄朗德鹅虽然具有更强的脂肪沉积能力,但更多的脂肪存储于腹脂和肠脂而非肝脏,降低了其填饲效率。This study was aimed to investigate the effects of overfeeding at different ages on Lipid deposition and slaughter performance among Landes geese.A total of 120 healthy Landes geese at the age of 70 and 120 days were assigned to two groups and reared under the same condition.The index reflecting growth,overfeeding and lipid deposition performance were recorded at the 14th day and the end of experiments.The results showed:(1)the body weight of 70-day-old geese was 235.71 g lower than that in 120-day-old geese.No significant difference in the body weight and body weight gain between age groups was detected at the end of overfeeding experiments.(2)The average fatty liver weight of 120-day-old geese was significantly higher than that in 70-day-old geese(P<0.05).However,the ratio of feed to fatty liver weight among 70-day-old geese(26.18)was significantly lower than that among 120-day-old geese(30.43)(P<0.05).(3)For lipid deposition performance,no significant difference between groups was found for the abdominal fat weight and the ratio of abdominal fat weight to body weight.But the mesenteric fat among 120-day-old geese was significantly higher than that among 70-day-old geese(P<0.05).(4)The weight of wings,head,gizzard,proventriculus and flippers among 120-day-old geese was slightly higher than that of 70-day-old geese but no significant difference was detected(P>0.05).Taken together,the body weight gain and feed reward among 70-day-old geese was higher than that of 120-day-old geese although the fatty liver weight among 70-day-old geese was lower.This indicated a better overfeeding efficiency among younger geese.Older geese had better lipid deposition performance,but more lipid was deposited in abdominal and mesenteric tissues rather than liver,resulting in lower overfeeding efficiency.

关 键 词：朗德鹅 开填日龄 体重 脂肪沉积 屠宰性能 

分 类 号：S835[农业科学—畜牧学]