江南白鹅消化器官的早期生长发育特点及其相关性研究

Early Growth and Development Characteristics of Digestive Organs and Their Correlation with Body Weight in Jiangnan White Geese

为探究江南白鹅消化器官早期生长发育特点,通过饲养试验研究江南白鹅消化器官的生长发育规律及其与体重的相关关系,以期为江南白鹅及其他中型白鹅的饲料科学配制和科学饲养参考。结果表明:①4周龄时,各消化器官的长度或重量与9周龄时比较,十二指肠、空肠和回肠的长度和重量均达80%以上,盲肠达69%,胃重量达63%,肝脏重量达56%。0—4周中,第1周各消化器官的指数增长率最高,均达66%以上。②4周龄时,江南白鹅的十二指肠长度、空肠长度、空肠重量和腺胃重量与9周龄时体重呈显著正相关(P<0.05);其他指标与体重相关性不显著(P>0.05)。③整个生长期,江南白鹅消化器官的生长发育集中于前4周,肠道优先发育,随后是胃部,再其次是肝脏。消化器官的生长发育高峰期在第1周,且速度大于同期体重。空肠早期的生长发育情况与体重生长相关性最强。

To explore the characteristics of early growth and development of digestive organs of Jiangnan white geese,the growth and development of digestive organs of Jiangnan White Geese and its correlation with body weight were studied by feeding experiment,which was expected to provide scientific feed preparation and feeding reference for Jiangnan White Goose and other medium-sized white geese.The results showed as follows:①compared with the white geese at 9 weeks old,the length and weight of duodenum,jejunum and ileum at the age of 4 weeks were over 80%,and the length and weight of cecum was 69%,the weight of stomach and liver were 63%and 56%,respectively.The exponential growth rate of each digestive organ was the highest(over 66%)in the first week from 0 to 4 weeks.②The length of duodenum and jejunum,the weight of jejunum and glandular stomach of Jiangnan White Geese at 4 weeks of age were significantly positively correlated with their body weight at 9 weeks of age(P<0.05),while other indexes were not significantly(P>0.05)correlated with their body weight.③During the whole growth period,the growth and development of digestive organs of Jiangnan White Geese were concentrated in the first 4 weeks,and the priorities were intestine,stomach and liver.The growth and development of digestive organs peak in the first week,and the speed was higher than that of body weight in the same period.The growth and development of jejunum in the early stage had the strongest correlation with body weight.