本试验旨在研究不同饲料加工工艺及维生素添加量对肉仔鸡生长性能和屠宰性能的影响。试验选用480只1日龄体重接近的白羽爱拔益加肉仔鸡，随机分为4组，每组8个重复，每个重复20只鸡。对照组（A组）饲粮采用普通饲料加工工艺，配方中添加正常剂量的复合维生素[前期（1~21日龄）350 mg/kg、后期（22~42日龄）250 mg/kg]；试验组饲粮采用高效调质低温制粒工艺，减少配方中复合维生素添加量（B组：前期280 mg/kg、后期200 mg/kg；C组：前期224 mg/kg、后期160 mg/kg；D组：前期180 mg/kg、后期128 mg/kg）。试验期42 d。结果表明：试验前期，A组肉仔鸡饲料淀粉糊化度显著低于B组、C组和D组（P<0.05）。试验后期，A组肉仔鸡饲料颗粒耐久性指数显著低于B组、C组和D组（P<0.05）。试验前期、后期和全期（1~42日龄），各组肉仔鸡的末重、平均日增重、平均日采食量和料重比均差异不显著（P>0.05）。各组肉仔鸡的腿重/屠宰重、胸肉重/屠宰重、心脏重/屠宰重、肝脏重/屠宰重、脾脏重/屠宰重、肌胃重/屠宰重、腺胃重/屠宰重均差异不显著（P>0.05），各组十二指肠、空肠和回肠的长度及重量均差异不显著（P>0.05）。由此可见，肉仔鸡饲粮采用高效调质低温制粒工艺，颗粒饲料加工质量优于普通饲料加工工艺，且饲料配方中减少维生素添加量对肉仔鸡生长性能和屠宰性能与普通饲料加工工艺无显著差异，即该工艺可节约维生素使用量。

This experiment was to study the effects of different feed processing technology type and vitamin additive amount on growth performance and slaughter performance of broilers. A total of 480 one-day-old broilers with similar body weight were randomly divided into 4 groups with 8 replicates per group and 20 broilers per replicate. The diet of control group (group A) was processed by ordinary feed processing technology, added the normal dose of compound vitamins[earlier stage (1 to 21 days of age) 350 mg/kg, later stage 250 mg/kg (22 to 42 days of age)]; the diets of experimental groups were processed by high effective conditioning and low temperature pelleting technology, which reduced the addition of vitamin in the diets (group B:earlier stage 280 mg/kg, later stage 200 mg/kg; group C:earlier stage 224 mg/kg, later stage 160 mg/kg; group D:earlier stage 180 mg/kg, later stage 128 mg/kg). The experiment lasted for 42 days. The results showed that the starch gelatinization of feed of group A in earlier stage was significantly lower than that of groups B, C and D (P<0.05). In the later stage, the pellet durability index of group A was significantly lower than that of groups B, C and D (P<0.05). There was no significant differences on the final body weight, average daily gain, average daily feed intake and ratio of feed to gain of broilers in earlier stage, later stage and whole stage (1 to 42 days of age) among all groups (P>0.05). There were no significant differences on the leg weight/slaughter weight, breast meat weight/slaughter weigh, heart weight/slaughter weight, liver weight/slaughter weight, spleen weight/slaughter weight, muscular stomach weight/slaughter weight and glandular stomach weight/slaughter weight among all groups (P>0.05), there were no significant differences on the length and weight of duodenum, jejunum and ileum among all groups (P>0.05). In conclusion, the diets of broilers are processed by high efficiency conditioning and low temperature pelleting technology, the quality of pellet feed is better than ordinary feed processing technology, and reduce the vitamin additive amount have no significant different on growth performance and slaughter performance of broilers compared with ordinary feed processing technology, the high effective conditioning and low temperature pelleting technology can save the use of vitamin.