摘要
This study was conducted to determine the effects of supplementing diets with microencapsulated blends of phytogenics (MPH) on growth performance, carcass characteristics, fecal microbiota, blood constituents, and excreta noxious gas emission in broiler chickens. A total of 768 d-old Ross 308 (as hatched) broiler chicks with an average initial body weight of 40 ± 0.9 g were used in a 35-d growth assay. There were 4 treatments and each treatment consisted of 12 replications with 16 birds/pen, with food and water consumed ad libitum. Treatments were designed as a corn-soybean-meal-based diet with none, 0.025 and 0.05, and 0.075% of MPH. Data were analyzed as a completely randomized design via ANOVA using the GLM procedure described by SAS. Polynomial regression was used to describe the shape of the response to increasing concentration of microencapsulated blends of phytobiotics in the diet. Results indicated improvement in body weight gain (BWG) and feed conversion ratio (FCR) (linear effect, P < 0.05). Increasing concentration of MPH in the diet from none to 0.075% increased (P < 0.05) BWG at d 1 to 7, 7 to 21, and 1 to 35, and decreased FCR at d 7 to 21 and 1 to 35 (P < 0.05). Supplementing the diets with various levels of MPH had no effect on pH value of the breast meat, meat color and relative organ weights, but drip loss percentage decreased linearly (P = 0.01) on d 7 by increasing the concentration of MPH from none to 0.075%. Fecal microbiota assay indicated that supplementing the diets with 0 to 0.075% of MPH increased the fecal Lactobacillus count linearly (P = 0.002), but the E. coli count was not affected. Results demonstrated that whole blood cell counts, lymphocyte percentage and IgG concentration were not influenced, but concentration of haptoglobin dropped linearly (P = 0.001) by increasing dietary concentration of MPH. Thus, it was concluded that inclusion of MPH improved growth performance and positively manipulated fecal Lactobacillus population with no negative effect in broilers.
摘要译文
本研究旨在确定补充微囊化植物成分（MPH）混合物对生长性能，胴体特征，粪便微生物群，血液成分和排泄物对肉鸡有毒气体的排放。共有768只d龄的Ross 308（孵出的）肉鸡，平均初始体重为40±0。9克用于35-d生长测定。有4种处理，每种处理包括12次重复，每只16只鸟，食物和水随意消耗。处理被设计为基于玉米 - 豆粕 - 膳食的饮食，其中无，0.025和0.05，以及0.075％的MPH。使用SAS描述的GLM程序通过ANOVA将数据分析为完全随机设计。使用多项式回归来描述饮食中植物生物素微胶囊混合物浓度增加的响应形状。结果表明体重增加（BWG）和饲料转化率（FCR）的改善（线性效应，P 0.05）。饮食中MPH浓度从无增加到0.075％（P 0。05）在第1至7,7至21和1至35的BWG，并且在第7至21和1至35时降低FCR（P 0.05）。补充不同水平MPH的日粮对胸肉的pH值没有影响，肉色和相对器官重量，但通过将MPH浓度从无增加到0.075％，滴水损失百分比在第7天线性下降（P \x3d 0.01）。粪便微生物群测定表明补充0〜0.075％MPH的饮食会使粪便中的乳酸杆菌计数线性增加（P \x3d 0.002），但大肠杆菌计数不受影响。结果显示，全血细胞计数，淋巴细胞百分比和IgG浓度不受影响，但触珠蛋白浓度线性下降（P \x3d 0。001）通过增加MPH的膳食浓度。从而，结论是，包含MPH改善了生长性能并积极操纵粪便乳杆菌种群，对肉鸡没有负面影响。
M. Mohammadi Gheisar;J. W. Park;S. Mohana Devi;I. H. Kim. 210 Evaluating the effects of microencapsulated blends of phytobiotics in the diet of broiler chickens[J]. Journal of Animal Science, 2016,94(Sup2): 99