壳聚糖对肉鸡抗氧化能力及生产性能的作用

Effects of chitosan on meat chicken’s anti-oxidation activity and production performance

为了探讨壳聚糖对家禽肉鸡抗氧化能力及生产性能的作用,采用1日龄黑脚大麻鸡6组各100只进行分组实验,喂食壳聚糖复合剂,测定了肉鸡血清中超氧化物歧化酶(SOD)活力、丙二醛(MDA)含量、谷胱甘肽过氧化物酶(GSH-PX)活力、免疫器官指数、腹脂率和料重比等指标。结果表明:2种分子量的壳聚糖在较低浓度时能显著提高60日龄肉鸡血清中SOD的酶活力(P<0.05),但对其他日龄肉鸡血清中SOD酶活力影响不显著;壳聚糖对血清中MDA含量和GSH-PX酶活力影响不显著;实验组的存活率提高,腹脂率和料重比稍有下降。在肉鸡饲养中,壳聚糖是一种潜在的、绿色的抗生素替代品。

In a pilot hennery, chitosan agents were applied to approach their functions on meat chicken＇s anti-oxidation activity and production performance by determining the superoxide dismutase （SOD） and glutathione peroxidase （GSH-PX） activities and malondialdehyde （MDA） concentration in blood serum, and the immune organ index, percentage of abdomen fat, and ratio of chicken meat mass to feedstuff. The experiment was designed as 6 groups, with 100 one-day- old chickens for each. It was indicated that after applying two chitosan agents with different molecular weight at low doses, the serum SOD activity was significantly higher （ P 〈 0.05 ） in 60- day-old chickens, but had less difference in the chickens of other ages. The chitosans applied had no significant effects on the serum MDA concentration and GSH-PX activity. Compared with those fed with antibiotics, the chickens fed with chitosans had an enhanced survival rate, but the percentage of their dissected abdominal fat （PDAF） and the ratio of meat mass to feedstuff decreased slightly. It was suggested that chitosan could be a potential natural green product to replace antibiotics for chicken feeding.