发酵的热带叶粉(FTLM)目前被添加到鸡饲料中,以提高鸡的生产力,因为它们有营养和药用益处。然而,FTLM对肉鸡生产力和健康的影响尚不清楚。因此,这项荟萃分析旨在评估FTLM对肉鸡性能结果的影响,检索了11项对照研究,用于探索日粮FTLM补充对生长性能的影响[采食量(FI),饲料转化率(FCR),平均日增益(ADG)],血脂,屠宰性能(腹部脂肪,乳房和大腿肌肉重量),肉质[pH,滴水损失,剪切力,亮度(L*),发红(a*),和黄色(b*)],和肠道组织形态学[绒毛高度(VH),肉鸡的隐窝深度(CD)和VH/CD值]。调节者效应的亚组和荟萃回归分析(即,叶粉类型,补充水平,肉鸡菌株,饲养阶段,和发酵微生物)对肉鸡生长性能的影响。结果表明,膳食FTLM补充增加FI[标准化平均差(SMD)=0.11;95%置信区间(CI):0.02,0.20;P<0.0001],改善了肉鸡的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提高了屠宰性能,肉质,和肉鸡的肠道组织形态学。饲喂0-5g/kg饲料FTLM的肉鸡具有更好的FI,FCR,和ADG比对照组考虑了显著的异质性。元回归显示,分析的调节因素影响了增长绩效结果,并解释了一些异质性的来源。可以得出结论,在肉鸡饲料中添加高达5g/kg的FTLM可以提高生长性能,肠道组织形态学,屠宰性能,和肉质,对敷料百分比和血脂谱无不利影响。
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.