有机镁饲用时间对肉仔鸡抗氧化机能的影响

研究有机镁的不同饲用时间对肉仔鸡生长性能和抗氧化机能的影响。试验共使用 4 5 0只肉仔鸡 ,分成 5个处理 :处理 1(对照组 )、处理 2 ,3,4 ,5 ,分别在第 7,6 ,5和 4周开始使用有机镁日粮。试验结果 :最后 4周使用有机镁有降低肝脏和心脏MDA含量的趋势。使用有机镁可显著提高肝脏的TAOC(P <0 .0 5 ) ,并表现出对使用时间的依赖性。最后 2周使用有机镁可显著提高心脏TAOC。有机镁的使用显著提高了脾脏GSH Px的活性 ,并表现出对使用时间的依赖性。处理 3,4和 5肌肉的CAT活性显著提高 (P <0 .0 5 )。最后 3周使用有机镁显著提高脾脏CAT的活性 (P <0 .0 5 )。使用有机镁显著提高心脏GSH水平

Effect of Organic Magnesium Supplemented from Different Time on the Antioxidation Capacity of Broilers

An experiment was conducted to study the effect of OM supplementation time on the performance and anti-oxidation capability of broilers. Four hundred and fifty day-old broilers were randomly allotted to five treatments. The five treatments were control, and group 2, 3, 4, and 5 (organic Mg diet was fed from 7th, 6th, 5th and 4th week respectively). The results showed that there was a tendency to reduce the MDA content in liver and heart with the supplementation of OM in the last four weeks. Broilers in group 3 had higher TAOC (P<0.05). Birds fed OM had higher TAOC of liver, and GSH-Px activity of spleen compared with those of control (P<0.05), and showed time-length-dependent character. The activity of CAT in muscle of group 3, 4 and 5 were enhanced significantly (P<0.05). The activity of CAT in spleen of group 4 was increased significantly (P<0.05). The use of OM enhanced the level of GSH in heart significantly (P<0.05).