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茶皂素对肉鸡肠道球虫、血液生化指标及其生产性能的影响论文
decreased in leg flesh was 9.13% (P0.05) when the addition of tea saponin was 400mg/kg. The difference of the pH value and water in muscle were not notable (P0.05). (4) Effect ofimmune organs indexes of broilers When the addition of tea saponin was 400mg/kg, the cloacal bursa index of broiler was significantly higher than that of control (P0.05). There was no significant difference in thymus index and spleen index (P0.05) when different levels of tea saponin were added to the basal diet, but showed an increasing trend. The results indicated that tea saponin can promote the development of animal immune organs, or improve the immune function of broilers. (5) Effect ofbiochemical index in blood Comparison with the control, the higher dose oftea saponin supplement could decrease TC and TG contents in serum. The TC levelof serum decreased by 30.72% (P0.05) when the addition of tea saponin reached 500mg/kg at day 14. The most significant reduction ratio of TG contents in serum was 40.15% (P0.05) for 400 mg/kg tea saponin at day 28. At day 42, the best result for HDLC in serum increased by 19.08% (P0.05) for 400mg/kg tea saponin. TP, ALB, and GLO content in serum were improved, while LDLC in serum was decreased, but the difference were also significant (P0.05). The GLU level in serum increased by 20.53% for 500 mg/kg tea saponin group at day 14 on compared with the control. Keywords: Tea Saponin, Tea Seed Meal, Coccidiosis, Breeding Performance, Meat Quality, Blood Index ii 1 文献综述 1.1 鸡球虫病概述 有鸡的地方,就有鸡球虫病的存在,而目前集约化养鸡场常是鸡球虫病爆发的最 适宜场所,其发病率高达 50%~70%,死亡率为 20%~30%,严重时可高达 80%。各种 [1] 鸡病中,鸡球虫病的发生率最高,占 1/6~1/5 。据 Bhogal 等(1992)报道,全球每 [2] 年因鸡球虫病造成的直接经济损失达 20 亿美元,每年抗球虫药消费是 3.2 亿美元 。 郁明发等人报道, 我国年养鸡量
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