腰果叶提取物对肉鸡生长性能、血液生化及肉品质的影响

文章旨在评估腰果叶提取物对肉鸡生长性能、血液生化指标及肉品质的影响。试验将504只1日龄肉仔鸡随机分为3组,每组6个重复,每个重复28只。在试验过程中,对照组、处理1和2组肉鸡分别饲喂阶段基础日粮+0、100和200 mg/kg的腰果叶提取物。结果:与对照组相比,100 mg/kg腰果叶提取物组肉鸡的末重(42 d)、22~42 d平均日增重分别显著提高2.20%和3.40%(P<0.05),生长后期(22~42 d)和全期(1~42 d)料重比分别显著降低3.78%和2.71%(P<0.05)。200 mg/kg腰果叶提取物组与对照组和100 mg/kg腰果叶提取物组对肉鸡生长指标的影响无显著差异(P>0.05)。与对照组相比,100和200 mg/kg腰果叶提取物组肉鸡白细胞数量分别显著降低66.60%和68.03%(P<0.05),而红细胞数量分别显著提高23.00%和26.20%(P<0.05),血红蛋白浓度分别显著提高73.93%和77.03%(P<0.05)。100和200 mg/kg腰果叶提取物组肉鸡的腹脂相对重量、胸肌TBARS值和滴水损失显著低于对照组(P<0.05)。结论:在本研究条件下,综合考虑血液指标、肉品质和饲料转化率,日粮中腰果叶提取物的适宜添加水平为100 mg/kg。

Diagnosis and Etiology of Secondary Infection of Escherichia coli with Rabbit Coccidiosis

In November 2012,diarrhea-predominant disease broke out in a large rabbit farm in Huaihua City,leading to mortality rate of 5. 3%. Through survey of incidence,combined with clinical symptoms,pathological changes and laboratory diagnosis,the disease was confirmed as secondary infection of E. coli with rabbit coccidiosis,and it had been controlled after drug treatment.