不同硒源对蛋雏鸡生长性能和免疫器官发育的影响

Effects of Different Selenium Sources on the Growth Performance of Laying Chicks and the Development of Their Immunity Organs

为研究亚硒酸钠与纳米硒对蛋雏鸡生长性能和免疫器官发育的影响。试验选用罗曼蛋雏鸡120只,随机分为3组:Ⅰ组为对照组,饲喂基础日粮;Ⅱ、Ⅲ组分别添加0.4mg/kg亚硒酸钠和纳米硒的基础日粮。在试验鸡26,36日龄时的清晨称重,每组随机扑杀5只,取免疫器官,计算免疫器官指数,并进行组织切片观察。结果表明:试验鸡36日龄时的生长性能,Ⅱ组与Ⅰ组相比结果显著(P<0.05),Ⅲ组与Ⅰ组相比结果极显著(P<0.01);免疫器官指数,Ⅱ、Ⅲ组与Ⅰ组相比结果不显著(P>0.05);免疫器官结构:脾脏,Ⅱ、Ⅲ组动脉周围淋巴鞘变大、脾小结变大;法氏囊,Ⅱ、Ⅲ组法氏囊皮质增厚;胸腺,Ⅱ、Ⅲ组胸腺皮质增厚、胸腺小体变大。Ⅱ、Ⅲ组比较,Ⅲ组在脾小结变化中表现更为明显。结论:在蛋雏鸡饲料中添加纳米硒能促进其生长并增强免疫器官功能。

The effects of sodium selenite and nano selenium on the growth performance of laying chicks and the development of their immune organs were studied in the experiment. One hundred and twenty Luoman laying chicks were chosen and divided into 3 groups randomly. Group Ⅰ was the controlled group,in which the chicks were fed with basal diet. The chicks were fed with basal diets added with 0.4 mg/kg sodium selenite and nano selenium resp. in group Ⅱ and Ⅲ. The experimental chicks were weighted on the morning when they were 26 and 36 days old. Five chicks of each group were killed,their immunity organs were fetched out for calculating immunity organ index and observation of section. The results showed that the growth performance of 36 days old experimental chicks had significant difference between group Ⅱ and Ⅰ （P〈0.05）and had extremely significant difference between group Ⅲ and Ⅰ （P〈0.01）; the immunity organ index had no significant difference between group Ⅱ ,Ⅲ and Ⅰ （P 〉0.05）; the periarterial lymphatic sheaths and splenic corpuscles of group Ⅱ and Ⅲ became bigger; the bursal cortex of group Ⅱ and Ⅲ became thicker; the thymic cortex of group Ⅱ and Ⅲ became thicker and their thymic corpuscles became bigger. The comparison on group Ⅱ and Ⅲ ,the splenic corpuscles of group Ⅲ changed more obviously. The addition of nano selenium in the feed of laying chicks could promote their growth and strengthen the function of their immunity organs.