Giacobbo Franciele C N, Eyng Cinthia, Nunes Ricardo V, de Souza Cleison, Teixeira Levy V, Pilla Rachel, Suchodolski Jan S, Bortoluzzi Cristiano
Animal Science Department, Western State Paraná University, Paraná, Brazil.
DSM Nutritional Products, São Paulo, Brazil.
Poult Sci. 2021 May;100(5):101013. doi: 10.1016/j.psj.2021.01.035. Epub 2021 Jan 22.
The effect of supplementation of different enzymatic associations in the feed of broiler chickens formulated with corn dried at 80°C or 110°C on growth performance and carcass yield was evaluated. In addition, the influence of the different enzymatic associations on the cecal microbiota was studied. One-day-old male broiler chicks (1,320) were distributed in a completely randomized design in a 2 × 5 factorial arrangement (6 replicates; 22 birds/replicate). The treatments were 2 corn drying temperatures (80°C and 110°C) and 5 diets. The diets consisted of a positive control (PC), a negative control (NC) with a reduction of 100 kcal/kg of apparent metabolizable energy, and 3 enzyme combinations added to the NC diet: amylase, amylase + xylanase, and amylase + xylanase + protease. The feed conversion ratio (FCR) from 1 to 7 d of chickens fed diets formulated with corn dried at 80°C was better (P = 0.045) than that of chickens fed diets dried at 110°C. Regardless of the enzymatic association, the supplementation improved body weight gain (P = 0.01) of the NC group to the same level as the PC group. The FCR of the NC was similar to that of the PC only when the 3 enzymes were included from 1 to 21 d (P = 0.001) and regardless of the enzymatic association for the period from 1 to 42 d (P = 0.007). Regarding cecal microbiota, the alpha diversity was similar among the groups (P > 0.05). The beta-diversity analysis showed that the microbiota of the birds receiving the combination of the 3 enzymes was similar to that of birds fed the PC diet (P = 0.18; R = 0.074), with a similar effect observed for the predicted metabolic functions (Linear discriminant analysis effect size). In conclusion, chickens fed diets formulated with corn dried at 80°C had better FCR during the prestarter phase. The enzymatic supplementation improved the FCR of the birds, which may partially be explained by the modulation of the cecal microbiota.
评估了在以80°C或110°C干燥的玉米配制的肉鸡饲料中添加不同酶组合对生长性能和胴体产量的影响。此外，研究了不同酶组合对盲肠微生物群的影响。将1320只1日龄雄性肉鸡雏鸡按照完全随机设计，以2×5析因排列方式分布（6个重复；每个重复22只鸡）。处理因素为2种玉米干燥温度（80°C和110°C）和5种日粮。日粮包括一个正对照（PC）、一个表观代谢能降低100 kcal/kg的负对照（NC），以及添加到NC日粮中的3种酶组合：淀粉酶、淀粉酶+木聚糖酶、淀粉酶+木聚糖酶+蛋白酶。饲喂以80°C干燥玉米配制日粮的鸡在1至7日龄时的饲料转化率（FCR）优于（P = 0.045）饲喂以110°C干燥玉米配制日粮的鸡。无论酶组合如何，添加酶均将NC组的体重增加提高到（P = 0.01）与PC组相同的水平。仅在1至21日龄添加3种酶时（P = 0.001）且在1至42日龄期间无论酶组合如何（P = 0.007），NC组的FCR与PC组相似。关于盲肠微生物群，各组间的α多样性相似（P > 0.05）。β多样性分析表明，接受3种酶组合的鸡的微生物群与饲喂PC日粮的鸡的微生物群相似（P = 0.18；R = 0.074），预测代谢功能也观察到类似效果（线性判别分析效应大小）。总之，饲喂以80°C干燥玉米配制日粮的鸡在育雏前期具有更好的FCR。酶添加改善了鸡的FCR，这可能部分归因于对盲肠微生物群的调节。
