PDF(Pubmed)
Abstract：
This study aimed to examine the effects of incorporating amaranth (Amaranthus spinosus, either raw or heat-treated) into broiler diets on growth performance, meat antioxidant capacity, haemato-biochemical parameters, intestinal histomorphometry, and cecal volatile fatty acid profile. A total of 210 male Ross 308 broiler chicks were allocated to five dietary treatments in a completely randomized design, with each treatment comprising six replicates of seven birds each. The control group received a diet based on maize and soybean meal, while the remaining dietary groups were formulated to be isonitrogenous and isocaloric to the control, with exact levels of 10% and 20% raw or heat-treated amaranth in the diet. Body weight and feed intake were monitored on days 0, 10, 24, and 39 of the study. On day 39, two birds per replicate were randomly selected for blood sampling, followed by slaughtering for further parameter examination. Incorporating A. spinosus up to 20% in broiler diets had no adverse effect on body weight gain compared to the control. However, higher levels of amaranth led to a negative impact on the feed conversion ratio, attributed to increased feed intake. Furthermore, amaranth supplementation did not negatively influence carcass yield or various organ weights, except for the gizzard, which was heavier in the amaranth-fed groups. Notably, amaranth supplementation reduced abdominal fat, enhanced meat antioxidant status, and had no detrimental effects on blood biochemical or hematological indices. Additionally, amaranth feeding resulted in decreased blood triglyceride levels but had no effect on cholesterol levels. While heat treatment of amaranth did not significantly alter the performance of broiler chickens, it enhanced the beneficial effects of amaranth feeding on the histomorphological features of the duodenum and ileum, and increased blood IgG levels. The cecal volatile fatty acid profile remained largely unaffected by amaranth inclusion, although heat-treated amaranth led to increased levels of branched-chain fatty acids and valerate. Overall, the findings suggest A. spinosus as a promising alternative feed ingredient for broilers when included at 10% of the diet. However, further research is needed to investigate the effect of various amaranth species, processing methods and enzyme supplementation on poultry nutrition to expand its inclusion rate.
摘要：
这项研究旨在检查掺入a菜（Amaranthusspinosus，无论是生的还是热处理的)对生长性能的影响，肉类抗氧化能力，血液生化参数，肠道组织形态计量学,和盲肠挥发性脂肪酸谱。在完全随机的设计中，共有210只雄性罗斯308只肉鸡被分配到五种饮食处理中，每个处理包括六个重复的七个鸟。对照组接受以玉米和豆粕为基础的日粮,而其余的饮食组被配制成与对照组等氮和等热量，在饮食中精确水平为10％和20％的原料或热处理过的a菜。在研究的第0、10、24和39天监测体重和采食量。在第39天，每个重复随机选择两只鸟进行血液采样，然后屠宰进行进一步的参数检查。与对照相比,在肉鸡日粮中掺入高达20%的刺猬对体重增加没有不利影响。然而,较高的a菜含量会对饲料转化率产生负面影响，归因于饲料摄入量增加。此外，补充a菜不会对car体产量或各种器官重量产生负面影响，除了小精灵,在以a菜为食的组中较重。值得注意的是,a菜补充剂减少了腹部脂肪，增强肉类抗氧化状态，对血液生化或血液学指标无不利影响。此外,a菜喂养导致血液甘油三酯水平降低，但对胆固醇水平没有影响。虽然a菜的热处理并没有显着改变肉鸡的性能，它增强了a菜摄食对十二指肠和回肠组织形态特征的有益作用，和增加血液IgG水平。盲肠挥发性脂肪酸谱在很大程度上不受a菜内含物的影响，尽管热处理过的a菜导致支链脂肪酸和戊酸的含量增加。总的来说,研究结果表明，当在日粮中含有10%的肉鸡时，刺梨是一种有前途的替代饲料成分。然而,还需要进一步的研究来调查不同种a菜的影响，加工方法和补充酶对家禽营养扩大其包合率。
