V Gowthaman, Sharma Divya, Deo Chandra, A K Tiwari, Biswas Avishek
Avian Nutrition and Feed Technology Division, Central Avian Research Institute, Izatnagar, 243 122, India.
Animal Nutrition and Management Division Central Institute for Research on Cattle, Meerut, 250001, India.
Heliyon. 2024 Nov 7;10(22):e40230. doi: 10.1016/j.heliyon.2024.e40230. eCollection 2024 Nov 30.
The principal constituent of liquorice root () is glycyrrhizin, a triterpene saponin that is approximately many times sweeter than sucrose, the main active component. This study aimed to investigate the dietary liquorice root powder (LRP) on production performance, serum biochemical, gut health and carcass characteristics of Kadaknath (KN) birds as replacement of antibiotic growth promoter. Day-old Kadaknath chicks (n = 240) with uniform body weight were selected randomly and divided into six different treatments, each one with five replicates and eight birds per replicate, and raised in battery brooder cages for 15 weeks. Corn soya based basal diet (T) was prepared. In addition to the basal diet, five experimental diets were created with varying amounts of LRP i.e., T: T+ 0.1 % LRP, T: T+ 0.3 % LRP, T: T+ 0.5 % LRP, T: T+ 0.7 % LRP, and T: T+ 0.0335 % Chlortetracycline (CTC). Body weight gain and feed intake significantly (P ≤ 0.05) increased in T group on 0-5 wks and 5-9 wks of age. Significant (P ≤ 0.01) reduction in the feed intake was noted in the T group which was fed with maximum level (0.7 %) of inclusion of LRP. Dietary inclusion of liquorice in higher doses resulted in a significant (P ≤ 0.05) decrease in serum lipids such as triglyceride, LDL, and total cholesterol concentrations and a significant increase in the HDL cholesterol. Decrease in the coliform count of caecum significantly (P ≤ 0.05), but dose-dependent lactobacilli proliferation was seen in the caecum of treated birds (P ≤ 0.01). Supplementation of liquorice root powder in kadaknath birds resulted in significant increase (P ≤ 0.05) in the villus length and VH: CD ratio. Thus it may be concluded that dietary supplementation of liquorice root powder improved the bird's growth performance, serum lipid profile and gut health of Kadaknath birds.
甘草根的主要成分是甘草甜素，它是一种三萜皂苷，甜度约为蔗糖（主要活性成分）的许多倍。本研究旨在探讨日粮中添加甘草根粉（LRP）对卡达纳特（KN）鸡生产性能、血清生化指标、肠道健康和胴体特性的影响，以替代抗生素生长促进剂。选取体重均匀的1日龄卡达纳特雏鸡（n = 240），随机分为6个不同处理组，每组5个重复，每个重复8只鸡，在层叠式育雏笼中饲养15周。配制了以玉米-豆粕为基础的基础日粮（T）。除基础日粮外，还配制了5种添加不同量LRP的试验日粮，即T：T + 0.1% LRP、T：T + 0.3% LRP、T：T + 0.5% LRP、T：T + 0.7% LRP和T：T + 0.0335%金霉素（CTC）。T组在0 - 5周龄和5 - 9周龄时体重增加和采食量显著（P≤0.05）增加。在添加最高水平（0.7%）LRP的T组中，采食量显著（P≤0.01）降低。日粮中高剂量添加甘草导致血清脂质如甘油三酯、低密度脂蛋白和总胆固醇浓度显著（P≤0.05）降低，高密度脂蛋白胆固醇显著增加。盲肠中大肠菌群数量显著（P≤0.05）减少，但在处理鸡的盲肠中观察到剂量依赖性的乳酸杆菌增殖（P≤0.01）。在卡达纳特鸡中添加甘草根粉导致绒毛长度和VH:CD比值显著（P≤0.05）增加。因此，可以得出结论，日粮中添加甘草根粉可改善卡达纳特鸡的生长性能、血清脂质谱和肠道健康。
