Kpomasse C C, Oso O M, Lawal K O, Oke O E
Centre d'Excellence Regional sur les Sciences Aviaires (CERSA), University of Lome, Togo.
Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria.
Heliyon. 2023 Jan 16;9(2):e13060. doi: 10.1016/j.heliyon.2023.e13060. eCollection 2023 Feb.
This study was conducted to assess the juvenile development, thermotolerance, and intestinal morphology of broiler chickens fed Curcuma longa in a hot-humid environment.
In a Completely Randomized Design, 240 broiler chicks were randomly assigned to four nutritional treatments of baseline diets supplemented with 0 (CN), 4 (FG), 8 (EG), and 12 g (TT) of turmeric powder/Kg of feed, with four replicates of fifteen birds each. Data on feed consumption and body weights were evaluated weekly during the juvenile growth phase. The physiological indicators of the birds were assessed on day 56 of their lives. The birds were subjected to thermal challenge and data were collected on their physiological traits. Eight birds were randomly selected, euthanized and dissected in each treatment, and 2 cm segments of duodenum, jejunum, and ileum were sampled for villi width, villi height, crypt depth, and the villi height: crypt depth ratio measurements.
It was revealed that the weight gain of the birds in EG was significantly greater (p < 0.05) than that of CN birds. The birds in TT, FG, and CN had comparable but smaller duodenal villi than those in EG. The ileal crypt depth in EG chickens was smaller than in CN but comparable to the other treatment groups. In the duodenum, the villi to crypt depth ratio was in the order EG > TT > FG > CN.
To conclude, dietary supplementation of Curcuma longa powder, notably the 8 g/kg diet improved the antioxidant status, thermotolerance, and nutrient absorption by improving intestinal morphology in broiler chickens in a hot-humid environment.
本研究旨在评估在湿热环境中饲喂姜黄的肉鸡的幼雏发育、耐热性和肠道形态。
采用完全随机设计，将240只肉雏鸡随机分为四种营养处理组，即在基础日粮中分别添加0（CN）、4（FG）、8（EG）和12克（TT）姜黄粉/千克饲料，每组15只鸡，重复四次。在幼雏生长阶段每周评估采食量和体重数据。在鸡56日龄时评估其生理指标。对鸡进行热应激挑战，并收集其生理特征数据。每种处理随机选取8只鸡，安乐死并解剖，采集十二指肠、空肠和回肠2厘米长的肠段，测量绒毛宽度、绒毛高度、隐窝深度以及绒毛高度与隐窝深度之比。
结果显示，EG组鸡的体重增加显著高于CN组（p < 0.05）。TT组、FG组和CN组鸡的十二指肠绒毛长度与EG组相当，但较短。EG组鸡的回肠隐窝深度小于CN组，但与其他处理组相当。在十二指肠中，绒毛与隐窝深度之比顺序为EG > TT > FG > CN。
总之，在湿热环境中，日粮添加姜黄粉，尤其是添加量为8克/千克时，可通过改善肉鸡肠道形态来提高其抗氧化状态、耐热性和营养物质吸收。
