■这项研究的目的是评估不同水平的小麦包裹体对生长性能的影响,糖脂代谢,和肉鸡的胫骨特性。
■总共480只1日龄雄性肉鸡最初饲喂相同的起始日粮,直到第10天。随后,它们被分成3个处理,包括8个重复,每个重复20只鸟,即,1)低水平小麦添加组,在种植和整理期,小麦比例分别为15%和25%,分别为;2)中等水平小麦包合组,在种植者和整理者的饮食中加入30%和40%的小麦,分别;和3)高水平小麦添加组,在种植和整理日粮中含有55.8%和62.4%的小麦,直到D39。
■与中低水平小麦饮食相比,饲粮中高水平的小麦含量增加了采食量,降低了饲料转化率(均p<0.01),伴有较长的空肠(p=0.031)。同时,小麦的高水平添加显示出Ruminococin的丰度下降,拟杆菌,和乳酸菌比低小麦组。随着小麦处理比例的增加,胆固醇的含量,甘油三酯,血清高密度脂蛋白胆固醇升高,而血清C端交联端肽的浓度I型胶原,骨吸收标记,减少了。此外,中高水平小麦的饮食提高了胫骨的产量负荷,以及可比的骨骼尺寸和重量。
■中高水平小麦的添加增加了血清糖脂的沉积并增强了胫骨的机械性能,而高水平的小麦日粮损害了肉鸡的生长性能,这可能与肠道微生物群的改变有关。
UNASSIGNED: The aim of this study was to evaluate the effects of different levels of
wheat inclusion on growth performance, glycolipid metabolism, and tibial properties of broiler chickens.
UNASSIGNED: A total of 480 1-d-old male broiler chickens were initially fed identical starter diets until d 10. Subsequently, they were divided into 3 treatments consisting of 8 replicates with 20 birds per replicate, i.e., 1) low-level wheat addition group, with wheat ratios of 15% and 25% during the grower and finisher periods, respectively; 2) medium-level
wheat inclusion group, incorporating 30% and 40%
wheat in the grower and finisher diets, respectively; and 3) high-level
wheat addition group, containing 55.8% and 62.4%
wheat in the grower and finisher diets, until d 39.
UNASSIGNED: When compared to the low- and medium-level
wheat diet, the high-level
wheat inclusion in the diet increased feed intake and reduced the feed conversion ratio (both p<0.01), which was accompanied by a longer jejunum (p=0.031). Meanwhile, the high-level addition of wheat displayed a decreased abundance of Ruminococcin, Bacteroidetes, and Lactobacillus than the low-
wheat group. With the increase of the proportion of wheat treatment, the contents of cholesterol, triglyceride, and high-density lipoprotein cholesterol were elevated in serum, whereas the concentration of serum C-terminal cross-linked telopeptide of type I collagen, a bone resorption marker, was decreased. In addition, the diet with medium and high levels of wheat improved the yield load of tibia, along with comparable bone dimension and weight.
UNASSIGNED: The medium- and high-level wheat additions increased serum glycolipid deposition and enhanced tibial mechanical properties, whereas the high-level wheat diet compromised the growth performance of broiler chickens, which might be associated with the alteration of gut microbiota.