摘要
试验研究了半胱胺对中华鳖生长性能和非特异性免疫功能的影响,并对其机理进行了初步探讨。选取750只健康、活泼的中华鳖,平均体重(220±10)g,分成5个组,每个组设3个重复,每个重复50只。对照组基础日粮中不添加半胱胺,其余各组为试验组,半胱胺添加方式及添加量如下:试验Ⅰ组断续添加(每6天添加一次,6000mg/kg);试验Ⅱ组、试验Ⅲ组、试验Ⅳ组分别每天连续添加500、1000和1500mg/kg。试验期90d。试验结果表明:半胱胺能够提高中华鳖成活率、增重率、摄食率和饲料效率,且连续添加效果好于断续添加,当半胱胺含量达到1000mg/kg时,中华鳖增重率、摄食率和饲料效率达到最高(P<0.05);半胱胺使中华鳖血清胃泌素水平升高,血清生长抑素水平降低;1000mg/kg半胱胺可以显著提高中华鳖肌肉RNA/DNA比率(P<0.05);半胱胺还可以增强中华鳖血清谷胱甘肽过氧化物酶、超氧化物歧化酶活性,但不同添加方式及剂量之间无显著性差异,血清溶菌酶含量在500mg/kg半胱胺添加组最高(P<0.05)。由本试验结果可以看出,半胱胺对中华鳖具有促进生长、增强免疫的作用,是一种良好的生物添加剂,且其适宜添加量为每天连续添加1000mg/kg。
The experiment was conducted to determine the effects of cysteamine hydrochloride on growth performance and nonspecific immunity of Chinese soft-shelled turtle. Seven hundreds and fifty healthy Chinese soft-shelled turtles （220±10 g of average weight） were randomly divided into five groups, each group included three replicates of 50 soft-shelled turtles. The turtles were given a special diet supplemented with different effective dosages of cysteamine h.ydrochloride. The control group was fed basal diet,group Ⅰ was supplemented with 6 000 mg/kg CSH （cysteamine hydrochloride） which was fed once every 6 days,another three treatments were supplemented consecutively with 500 mg/kg CSH for group 11 ,1 000 mg/kg CSH for group Ⅲ, 1 500 mg/kg CSH for group Ⅳ. The experiment lasted for 90 days. Chinese soft-shelled turtles fed with 1 000 mg/kg CSH had significantly increased weight gain rate and feed efficiency. Diets supplemented with CSH also improved the level of serum somatostatin and gastrin in Chinese soft-shelled turtles. The ratio of RNA/DNA increased when 1 000 mg/kg CSH were supplemented （P〈0.05） ,and the CSH had improved the nonspecific immunity of Chinese soft-shelled turtles. The diet of CSH supplementation can improve the growth and the level of nonspecific immunity.
出处
《动物营养学报》
CAS
CSCD
北大核心
2007年第3期305-310,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
关键词
中华鳖
半胱胺
生长性能
非特异性免疫
Chinese soft-shelled turtle
Cysteamine hydrochloride
Growth performance
Nonspecific immunity
