Ogbuewu I P, Mabelebele M, Mbajiorgu C A
Department of Animal Science and Technology, Federal University of Technology, P.M.B. 1526, Owerri, Imo State, Nigeria.
Department of Agriculture and Animal Health, University of South Africa, Florida Science, Campus, Private Bag X6, Florida, 1710, South Africa.
Trop Anim Health Prod. 2024 Mar 11;56(2):98. doi: 10.1007/s11250-024-03944-w.
Fermented tropical leaf meals (FTLM) are currently added to chicken feed to improve chicken productivity due to their reported nutritional and medicinal benefits. However, the effects of FTLM on broiler productivity and health are less clear. Thus, this meta-analysis was designed to assess the effects of FTLM on the performance outcomes of broilers Eleven controlled studies were retrieved and used to explore the impacts of dietary FTLM supplementation on growth performance [feed intake (FI), feed conversion ratio (FCR), average daily gain (ADG)], blood lipids, slaughter performance (abdominal fat, breast and thigh muscles weight), meat quality [pH, drip loss, shear force, lightness (L*), redness (a*), and yellowness (b*)], and intestinal histomorphology [villus height (VH), crypt depth (CD) and VH/CD values] of broilers. Subgroup and meta-regression analyses of the effects of moderators (i.e., leaf meal type, supplementation level, broiler strains, rearing phase, and fermentation microbes) on the growth performance of broilers were also assessed. Results show that dietary FTLM supplementation increased FI [standardised mean difference (SMD) = 0.11; 95% confidence interval (CI): 0.02, 0.20; P < 0.0001], improved ADG (SMD = 0.33; 95% CI: 0.23, 0.43; P < 0.0001) and FCR (SMD = - 0.21; 95% CI: - 0.30, - 0.11; P < 0.0001) in broilers. In addition, FTLM enhanced slaughter performance, meat quality, and intestinal histomorphology of broilers. Broilers fed 0-5 g/kg feed FTLM had better FI, FCR, and ADG than the controls taking significant heterogeneity into account. Meta-regression revealed that analysed moderators influenced growth performance results and accounted for some of the sources of heterogeneity. It can be concluded that up to 5 g/kg of FTLM can be added to broiler feed to improve growth performance, intestinal histomorphology, slaughter performance, and meat quality without adverse effects on dressing percentage and blood lipid profiles.
由于发酵热带叶粉（FTLM）具有营养和药用价值，目前已被添加到鸡饲料中以提高鸡的生产性能。然而，FTLM对肉鸡生产性能和健康的影响尚不清楚。因此，本荟萃分析旨在评估FTLM对肉鸡生产性能的影响。检索了11项对照研究，并用于探讨日粮中添加FTLM对肉鸡生长性能[采食量（FI）、饲料转化率（FCR）、平均日增重（ADG）]、血脂、屠宰性能（腹脂、胸肌和腿肌重量）、肉质[pH值、滴水损失、剪切力、亮度（L*）、红度（a*）和黄度（b*）]以及肠道组织形态学[绒毛高度（VH）、隐窝深度（CD）和VH/CD值]的影响。还评估了调节因素（即叶粉类型、添加水平、肉鸡品种、饲养阶段和发酵微生物）对肉鸡生长性能影响的亚组分析和荟萃回归分析。结果表明，日粮中添加FTLM可提高肉鸡的FI[标准化均值差（SMD）=0.11；95%置信区间（CI）：0.02，0.20；P<0.0001]，改善ADG（SMD=0.33；95%CI：0.23，0.43；P<0.0001）和FCR（SMD=-0.21；95%CI：-0.30，-0.11；P<0.0001）。此外，FTLM还可提高肉鸡的屠宰性能、肉质和肠道组织形态学。考虑到显著的异质性，饲喂0-5g/kg饲料FTLM的肉鸡在FI、FCR和ADG方面优于对照组。荟萃回归分析表明，分析的调节因素影响生长性能结果，并解释了部分异质性来源。可以得出结论，在肉鸡饲料中添加高达5g/kg的FTLM可提高生长性能、肠道组织形态学、屠宰性能和肉质，且对屠宰率和血脂谱无不利影响。
