Meta-analysis of the influence of the substitution of maize with cassava on performance indices of broiler chickens

IF 1.8 Q2 AGRICULTURE, MULTIDISCIPLINARY Open Agriculture Pub Date : 2023-01-01 DOI:10.1515/opag-2022-0166
I. Ogbuewu, C. Mbajiorgu
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Abstract

Abstract There are growing numbers of publications on the effect of substitution of maize with cassava (Manihot esculenta Crantz) on growth indices of broiler chickens with variable results. The purpose of this meta-analysis was to explore the influence of substitution of maize with dietary cassava on growth traits (i.e., average daily feed intake [ADFI], body weight gain [BWG] and feed conversion efficiency [FCE]) of broilers. Search done in PubMed, Google scholar and Scopus databases yielded 303 studies of which 27 were suitable for the analysis. Heterogeneity was explored by subgroup and meta-regression analyses using the following moderator variables: publication year, study continent, processing methods, cassava form, substitution level, broiler strain, number of birds per groups and treatment durations. Results show that dietary cassava reduced ADFI (mean difference [MD] = −5.19 g/day; 95% confidence interval [CI]: −8.60, −1.79; I 2 = 99%) and BWG (MD = −8.49 g/day; 95% CI: −9.65, −7.33; I 2 = 98%) and increased FCE (MD = 0.29; 95% CI: 0.24, 0.35; I 2 = 99%) in broilers compared to controls. Publication year, broiler strain, treatment durations and substitution level) influenced the outcomes of the study and explained some of the sources of heterogeneity. In conclusion, our results suggested that dietary cassava inclusion at 5% (minimum) and 62% (maximum) reduced growth performance in broiler chickens. However, more effective methods for increasing the nutrient value of cassava roots for broiler chicken feeding as well as the cassava inclusion levels for optimal productivity are required.
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木薯替代玉米对肉鸡生产性能影响的Meta分析
摘要越来越多的文献报道了木薯(Manihot esculenta Crantz)替代玉米对肉鸡生长指标的影响,但结果不一。本荟萃分析旨在探讨木薯替代玉米对肉仔鸡生长性状(即平均日采食量[ADFI]、增重[BWG]和饲料转化率[FCE])的影响。在PubMed, b谷歌scholar和Scopus数据库中进行了搜索,得到303项研究,其中27项适合分析。通过亚组和元回归分析,探讨了异质性,采用以下调节变量:出版年份、研究大陆、加工方法、木薯形式、替代水平、肉鸡品系、每组鸟数和处理时间。结果表明:日粮木薯降低了ADFI(平均差值[MD] =−5.19 g/d;95%置信区间[CI]:−8.60,−1.79;I 2 = 99%)和BWG (MD =−8.49 g/day;95% ci:−9.65,−7.33;I 2 = 98%)和FCE升高(MD = 0.29;95% ci: 0.24, 0.35;i2 = 99%),与对照组相比。出版年份、肉鸡品系、处理时间和替代水平)影响了研究结果,并解释了异质性的一些来源。综上所述,饲粮中添加5%(最小)和62%(最大)木薯会降低肉仔鸡的生长性能。然而,需要更有效的方法来提高肉仔鸡食用木薯根的营养价值,并提高木薯的添加水平以达到最佳生产率。
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来源期刊
Open Agriculture
Open Agriculture AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
3.80
自引率
4.30%
发文量
61
审稿时长
9 weeks
期刊介绍: Open Agriculture is an open access journal that publishes original articles reflecting the latest achievements on agro-ecology, soil science, plant science, horticulture, forestry, wood technology, zootechnics and veterinary medicine, entomology, aquaculture, hydrology, food science, agricultural economics, agricultural engineering, climate-based agriculture, amelioration, social sciences in agriculuture, smart farming technologies, farm management.
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