【摘要】 文章旨在研究日粮添加不同水平亚麻籽对肉鸡生长、屠宰性能及肉品质的影响。试验选择1日龄AA肉鸡512只,随机分为4组,每组4个重复,每个重复32只鸡。试验以玉米-豆粕为基础日粮,各组日粮分别在基础日粮中添加0、5%、10%和15%亚麻籽,试验分为两个阶段,共进行42 d。15%亚麻籽组比对照组日增重显著降低10.27%(P <0.05),同时试验后3周体重显著降低7.28%(P <0.05)。随着日粮亚麻籽添加水平的升高,整个试验期肉鸡日增重显著降低(P <0.05)。对照组和5%亚麻籽组较10%和15%亚麻籽组显著降低了0～3周肉鸡料肉比(P <0.05),而对照组较5%和15%亚麻籽组显著降低了4～6周肉鸡料肉比(P <0.05),同时对照组较所有亚麻籽组显著降低了试验全期料肉比(P <0.05)。5%和15%亚麻籽组较对照组显著降低了肉鸡蛋白质和能量利用效率(P <0.05)。与其他各组相比,15%亚麻籽组显著降低了肉鸡胴体重(P <0.05);15%亚麻籽组较对照组和10%亚麻籽组显著降低了胸肌相对重量(P <0.05),而对照组较5%和15%亚麻籽组显著降低了腿肌相对重量(P <0.05)。随着日粮亚麻籽添加水平的升高,胸肌和腿肌亚麻酸含量显著升高(P <0.05),但对照组与5%亚麻籽组对腿肌亚麻酸含量无显著影响(P> 0.05),10%和15%亚麻籽组较对照组显著提高了胸肌和腿肌亚油酸含量(P <0.05)。在本试验条件下,日粮添加15%亚麻籽使肉鸡日增重降低8.2%,但日粮添加亚麻籽可以提高胸肌和腿肌亚油酸和亚麻酸含量,因此,日粮中适宜的亚麻籽添加水平为10%。更多还原

【Abstract】 This study was conducted to investigate the effects of dietary supplementation of different levels of flaxseed meal on growth performance,slaughter traits and meat quality of broilers. Five hundred and twelve 1 d AA broilers were randomly allotted to 4 groups with 4 replicates of 32 broilers. The basal diet was based on corn-soybean meal,and the experiment diets were addition of 0,5%,10% and 15% flaxseed meal into the basal diet. This trial induced 2 phases of 42 d. During first three weeks,there was no significant difference in weight gain among control and 5% flaxseed meal group but significant reduction of 10.27% in weight gain was observed in 15% flaxseed meal group(P <0.05). The weight gain 7.28%reduction was observed in 15% flaxseed meal group than the control group in the next three weeks of the experiment(P< 0.05). The feed conversion ratio was lower in the control group than the 5% and 15% flaxseed meal groups for the 4-6 w(P <0.05),and the flaxseed meal groups had the highest feed conversion ratio for the whole trial phase(P <0.05). 5% and 15% flaxseed meal groups had the lower protein and energy efficiency than the control group(P <0.05). Compared with the other groups,15% flaxseed meal group had the lowest carcass weight(P <0.05),and had the lower breast weight than the control and 10% flaxseed meal groups(P <0.05). The alpha-linolenic acid content in both breast and thigh tissues was increased significantly with increasing level of flaxseed meal(P <0.05),while 10 and 15% flaxseed meal groups had higher contents of linoleic acid than the control group(P <0.05). In conclusion,weight gain has been observed maximum to the level of 8.2% at 15% inclusion level of flaxseed meal,while the alpha-linolenic acid content in both breast and thigh meat was higher with increasing level of flaxseed meal in the diets. Therefore,10% of flaxseed meal can be used in the diets.更多还原