缓释包被复合酸化剂对肉鸡生长性能和肠道发育的影响

Effects of Coated Acidifier on Growth Performance and Intestinal Development of Broilers

试验旨在研究不同添加水平的缓释包被复合酸化剂对肉鸡生长性能和肠道发育的影响。选择1日龄雄性AA肉仔鸡450只,参考生产中的推荐添加量,随机分为对照组(基础饲粮)、抗生素组(添加80 mg/kg抗敌素和400 mg/kg杆菌肽锌)、0.05%组(添加0.05%包被复合酸化剂)、0.08%酸化剂组(添加0.08%包被复合酸化剂)和0.10%酸化剂组(添加0.10%包被复合酸化剂),每组6个重复,每个重复15只鸡,试验共42 d。结果显示:与对照组相比,0.05%、0.08%、0.10%添加组的21日龄体重分别增加了4.13%、3.54%和6.05%(P<0.05)、1~21日龄日增重分别显著提高了4.30%、3.62%、6.58%(P<0.05),料重比分别显著降低了3.57%、1.43%和3.57%(P<0.05);0.08%和0.10%添加组42日龄回肠相对重量显著提高了32.78%和18.53%(P<0.05)。结果表明,缓释包被酸化剂能显著提高生长前期肉鸡的生长性能,但对肠道长度和重量影响不大。

This experiment was to study the effect of coated acidifier on growth performance and intestinal development of broilers.According to the recommended dosage in production, 450 1-day-age male Arbor Acres broilers were selected and separated into the control group(basal diet), the antibiotics group(adding 80 mg/kg colistin and 400 mg/kg zinc bacitracin), 0.05% acidifier group(adding 0.05% coated acidifier), 0.08% acidifier group(adding 0.08% coated acidifier)and 0.10% acidifier group(adding 0.10% coated acidifier), which included 6 replicates with 15 birds per pen. The experiment lasted for 42 d. The results showed that compared with the control group, 0.05%, 0.08%, 0.10% coated acidifier increased the body weight(BW) by 4.13%, 3.54% and 6.05% respectively(P<0.05), and 4.30%, 3.62%, 6.58%(P<0.05) at 1 to 21 days of age in average daily gain(ADG) significantly, while decreased the feed conversion rate(FCR) at 3.57%,1.43% and 3.57% respectively(P<0.05). And also it was found that 0.08%, 0.10% coated acidifier increased the relative weight of ileum at 32.78% and 18.53%(P<0.05). The results indicated that coated acidifier could improve the growth performance of broiler chickens, but not increase the length and weight of intestine.