Manyelo Tlou Grace, Sebola Nthabiseng Amenda, Ng'ambi Jones Wilfred, Weeks William, Mabelebele Monnye
Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa.
Department of Agricultural Economics and Animal Production, University of Limpopo, Polokwane, South Africa.
Front Vet Sci. 2022 May 4;9:869149. doi: 10.3389/fvets.2022.869149. eCollection 2022.
This study aimed to determine the effect of varying inclusion levels of amaranth leaf meal on the performance, blood profiles, and gut organ characteristics of Ross 308 broiler chickens. A total of 200, day-old, Ross 308 broiler chicks were randomly allocated to five dietary treatments in a complete randomized design, with each group having four replicates with ten chicks. Amaranth leaf meal (ALM) inclusion levels used in this study were 0, 5, 10, 15, and 20%. Body weight and feed intake were measured weekly to calculate the feed conversion ratio. Gut organ weights, lengths, organ pH, and blood profiles were measured and the general linear model of statistical analysis software was used to analyze collected data. ALM had no effect ( > 0.05) on feed intake, body weight, or the feed conversion ratio of Ross 308 broiler chickens between 1-21 and 22-42 days, respectively. Furthermore, ALM inclusion levels had no effect ( > 0.05) on dry matter (DM) or gross energy (GE) digestibility of Ross 308 broiler chickens. Ross 308 broiler chickens, which were fed with 5% ALM inclusion levels, had higher ( < 0.05) white blood cells, lymphocytes, and eosinophils than those fed with diets containing 0, 10, 15, and 20%. Chickens that were fed with 0 and 20% ALM inclusion levels had higher ( < 0.05) heterophils than those fed with diets containing 5, 10, and 15%. Chickens that were fed with 15% ALM inclusion levels had higher ( < 0.05) monocytes, eosinophils, and basophils than those fed with diets containing 0, 10, and 20%. Apart from Ile, ALM inclusion of 5 and 10% had higher ( < 0.05) essential and nonessential amino acid digestibility in Ross 308 broiler chickens. ALM inclusion levels had no effect ( > 0.05) on gut organ lengths or weights of Ross 308 broiler chickens aged 21 and 42 days. In conclusion, 5, 10, and 15% ALM inclusion levels can be included in broiler chicken diets as they showed favor in most of the affected parameters.
本研究旨在确定不同添加水平的苋菜叶粉对罗斯308肉鸡生产性能、血液指标和肠道器官特征的影响。总共200只1日龄的罗斯308肉鸡雏鸡被随机分配到五个日粮处理组，采用完全随机设计，每组有四个重复，每个重复十只鸡。本研究中使用的苋菜叶粉（ALM）添加水平为0%、5%、10%、15%和20%。每周测量体重和采食量以计算饲料转化率。测量肠道器官重量、长度、器官pH值和血液指标，并使用统计分析软件的一般线性模型对收集的数据进行分析。在1至21日龄和22至42日龄期间，ALM对罗斯308肉鸡的采食量、体重或饲料转化率均无影响（P>0.05）。此外，ALM添加水平对罗斯308肉鸡的干物质（DM）或总能（GE）消化率无影响（P>0.05）。添加5%ALM的罗斯308肉鸡的白细胞、淋巴细胞和嗜酸性粒细胞数量高于添加0%、10%、15%和20%ALM日粮的肉鸡（P<0.05）。添加0%和20%ALM的肉鸡的嗜异性粒细胞数量高于添加5%、10%和15%ALM日粮的肉鸡（P<0.05）。添加15%ALM的肉鸡的单核细胞、嗜酸性粒细胞和嗜碱性粒细胞数量高于添加0%、10%和20%ALM日粮的肉鸡（P<0.05）。除了异亮氨酸外，添加5%和10%ALM的罗斯308肉鸡对必需和非必需氨基酸的消化率更高（P<0.05）。ALM添加水平对21日龄和42日龄罗斯308肉鸡的肠道器官长度或重量无影响（P>0.05）。总之，添加5%、10%和15%的ALM可用于肉鸡日粮，因为它们在大多数受影响参数方面表现良好。
