美系断奶獭兔消化器官发育规律的研究

畜牧兽医学报 ›› 2009, Vol. 40 ›› Issue (4): 515-521.

美系断奶獭兔消化器官发育规律的研究

李清宏¹，任克良²*，王保军¹，叶志远¹，张亚强¹，韩俊文¹

1.山西农业大学动物科技学院，太谷 030801；2.山西省农业科学院畜牧兽医研究所,太原 030032

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-04-25 发布日期:2009-04-25
通讯作者: 任克良

Developing Rule of Digestive Organs in Weaned Rex Rabbit from American Offspring

LI Qing-hong¹，REN Ke-liang²*，WANG Bao-jun¹，YE Zhi-yuan¹，
ZHANG Ya-qiang¹，HAN Jun-wen¹

1.College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu 030801,China;2.Institute of Animal Science,Shanxi Academy of Agricultural Sciences，Taiyuan 030032,China

Received:1900-01-01 Revised:1900-01-01 Online:2009-04-25 Published:2009-04-25

摘要/Abstract

摘要： 为了探索断奶獭兔消化功能的发育变化规律。以美系獭兔为研究对象，从28日龄起，对消化器官质量、小肠各段绒毛高度（VH）、隐窝深度（CD）、肠壁厚度（IWT）与胃蛋白酶、胰蛋白酶、淀粉酶的活性进行测定分析，并进行消化器官的Gompertz与Logistic模型拟合。结果：①消化器官发育的拐点日龄出现在30～60 d；快速生长阶段发生在：小肠与大肠35～63日龄、肝脏63～70日龄、胃49～56日龄；最大质量分别为：胃20.619 7 g、肝脏71.958 2 g、小肠42.500 3 g、大肠46.905 7 g，分别出现在98、122、119、120 d。显示消化器官的成熟顺序为：小肠、胃、大肠、肝脏。描述美系獭兔消化器官的发育Gompertz模型优于Logistic。②日龄显著影响小肠各段IWT（P<0.01），明显影响十二指肠前中部、空肠和回肠的VH（P<0.05），对十二指肠前中部和空肠CD影响显著（P<0.05）。③日龄对胃蛋白酶和小肠各段胰蛋白酶、淀粉酶活性的影响均不显著（P>0.05），但随日龄的增加酶活性有逐渐升高的趋势，稳定于60日龄左右。相同日龄的胰蛋白酶和淀粉酶在小肠不同肠段间的活性具有一定差异，表现为空肠最高，回肠居中，十二指肠最小。结论：Gompertz可以较好地用来描述美系獭兔消化器官的发育,獭兔消化器官的发育与日龄密切相关， 60日龄是其消化器官发育的拐点日龄，成熟于120日龄；断奶对消化器官形态学发育的影响恢复需要约2周的时间。

关键词: 獭兔, 消化, 发育

Abstract: An experiment involving a total of 250 weaned Rex Rabbits was conducted to investigate the development rule of digestive organs. The weight of digestive organs and villous height（VH）,crypt depth（CD）,intestinal wall thickness（IWT）and pepsin, amylase and trypsin activities in small intestine were measured weekly from 28 day-old. The model parameters of Gompertz and Logistic were fitted with software of CurveExpert 1.3. The results showed that：①The inflexion point of weight gain of digestive organs was from 30 to 60 d, and the duration of the fastest weight gain of small intestine, large intestine, liver and stomach occurred from 35 to 63 d，35 to 63 d, 63 to 70 d,49 to 56 d, respectively; and ultimate weight 20.619 7 g for stomach was gained on 98 d, and 71.958 2 g for liver on 122 d, 42.500 3 g for small intestine on 119 d, 46.905 7 g for large intestine on 120 d. Maturing order of digestive organs is small intestine, stomach, large intestine and liver. ②IWT of small intestine，VH of front and middle duodenum, jejunum and ileum，and CD of the front and middle duodenum and jejunum were affected significantly by days（P<0.01,or P<0.05）. ③Days had no significant influence on the activities of of pepsin trypsins and the starch enzyme in small intestine（P>0.05），the enzyme activity showed a increasing tendency with growth and kept steady-going on 60 d. The determing values of trypsin and amylase activities betwen different small intestinal sections were different, the highest for the jejunum, the second for ileum, the smallest for the duodenum. It was concluded that Gompertz model is better to describe development of the digestive organs in Rex Rabbits，the growth of Rex Rabbit digestive organs is closely related to days, and its inflexion point is on 60 d, the mature of the digestive organs is on 120 d, and the recovery of morphologic changes caused by weaning needs about 14 d.

Key words: Rex Rabbit, digest, growth

李清宏;任克良;王保军;叶志远;张亚强;韩俊文. 美系断奶獭兔消化器官发育规律的研究[J]. 畜牧兽医学报, 2009, 40(4): 515-521.

LI Qing-hong;REN Ke-liang;WANG Bao-jun;YE Zhi-yuan;ZHANG Ya-qiang;HAN Jun-wen. Developing Rule of Digestive Organs in Weaned Rex Rabbit from American Offspring[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2009, 40(4): 515-521.

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