Shawle Kassa, Urge Mengistu, Animut Getachew
Department of Animal and Range Sciences, Wolaita Sodo University, P.O. Box 138, Wolaita Sodo, Ethiopia ; School of Animal and Range Sciences, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia.
School of Animal and Range Sciences, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia.
Springerplus. 2016 Aug 30;5(1):1441. doi: 10.1186/s40064-016-3118-0. eCollection 2016.
Frequent use of antibiotics to stimulate growth and health of animals leads to the development of antibiotic-resistant populations of microorganisms. In this context, alternatives like herbs and spices to antibiotics are of importance, as they are natural products. Therefore, the present experiment was designed to evaluate the performance, carcass traits, hematology and serum biochemical parameters of broilers fed ration containing varying levels of Lepidium satvium (Garden cress) seed powder as feed additive up to the age of 42 days.
A total of 204 Cobb-500 day-old broiler chicks were randomly distributed into four treatments with three replicates of 17 chicks each. Garden cress (GC) was included in the ration at 0 (0GC), 0.75 (0.75GC), 1.50 (1.5GC) and 2.25 % (2.25GC) in each treatments. Growth performance, carcass characteristics, heamatology, serum biochemical and economic efficiency parameters were observed.
The crude protein, ether extract and crude fiber content of GC were 22.4, 25.7 and 10.5 %, respectively. Daily dry matter intake and average daily gain during the entire experimental period were affected (p < 0.01) by the treatment diet. Dry matter intake increased with increasing GC level in the ration. Average daily gain for the entire period was greater (p < 0.005) for 0.75 and 1.5GC than 0 and 2.25GC. Groups consumed GC containing ration had better (p < 0.004) drumstick percentage. However, most carcass parts and giblet weight were not affected (p > 0.05). Sex differences were significant for eviscerated, carcass and kidney percentages with greater values for females than males. All hematological parameters were within the normal range. However, inclusion of GC improved (p < 0.05) hemoglobin, packed cell volume and red blood cell count. Group consumed GC containing ration exhibited significant decrease in serum glucose, triglycerides and cholesterol concentration.
Inclusion of GC up to 2.25 % result in no any adverse effect on the health of broilers. Based on the production parameters used in the study, GC can be included as feed additive at a level of 0.75 % in the total ration for better and positive results on biological performance and health status of broilers.
频繁使用抗生素来促进动物生长和健康会导致微生物产生抗生素抗性群体。在这种情况下，诸如草药和香料等抗生素替代品很重要，因为它们是天然产物。因此，本试验旨在评估在42日龄前饲喂含有不同水平水田芥种子粉作为饲料添加剂日粮的肉鸡的生产性能、胴体性状、血液学和血清生化参数。
总共204只1日龄的科宝500肉鸡雏鸡被随机分为4个处理组，每组3个重复，每个重复17只鸡。每个处理组日粮中水田芥（GC）的添加量分别为0（0GC）、0.75%（0.75GC）、1.50%（1.5GC）和2.25%（2.25GC）。观察生长性能、胴体特性、血液学、血清生化和经济效益参数。
水田芥的粗蛋白、乙醚提取物和粗纤维含量分别为22.4%、25.7%和10.5%。整个试验期的日干物质摄入量和平均日增重受日粮处理的影响（p<0.01）。日粮中水田芥水平升高，干物质摄入量增加。整个时期0.75GC和1.5GC组的平均日增重比0GC和2.25GC组更高（p<0.005）。采食含水田芥日粮的组鸡腿比例更好（p<0.004）。然而，大多数胴体部分和内脏重量未受影响（p>0.05）。去内脏、胴体和肾脏比例的性别差异显著，雌性高于雄性。所有血液学参数均在正常范围内。然而，添加水田芥可提高（p<0.05）血红蛋白、红细胞压积和红细胞计数。采食含水田芥日粮的组血清葡萄糖、甘油三酯和胆固醇浓度显著降低。
添加高达2.25%的水田芥对肉鸡健康无任何不良影响。基于本研究中使用的生产参数，水田芥可作为饲料添加剂以0.75%的水平添加到总日粮中，从而对肉鸡的生物学性能和健康状况产生更好的积极效果。
