The objective of this study was to evaluate the effects of crude glycerin (CG) levels on performance, blood parameters, carcass yield and cuts, carcass chemical composition, and meat quality in broiler chickens. A total of 1,056 birds were randomly distributed into 2 experimental phases. In phase 1 (1–21 D), 6 levels of CG (0, 1, 3, 5, 7, and 9%) were supplemented in the diets, CG was supplemented at the expense of corn. Each CG level consisted of 8 replicates of 22 birds. In phase 2 (22–42 D), the inclusion levels of CG were maintained; however, 4 replicates of each CG level were given a CG-free ration. For this phase, each treatment combination consisted of 4 replicates. The inclusion of 5, 7, and 9% CG provided better weight gain (P < 0.05) than the control treatment (0% CG) during phase 1. The birds that received CG for both phase 1 and 2 (1–42 D) presented body weight gain, lower feed intake, and better feed conversion ratio relative to the group that received CG for only phase 1 (P < 0.05). Birds that received CG in their diet until age 21 D had higher blood levels of cholesterol and alanine aminotransferase than birds that received CG up to 42 D. The level of CG also influenced the protein deposition and the water retention of the carcass. It is concluded that CG can be included in broiler diets up to 9%, without impairing performance, blood parameters, and qualitative attributes of the meat.

这项研究的目的是评估粗甘油（CG）水平对肉鸡的生产性能，血液参数，car体产量和切面率，car体化学成分和肉品质的影响。总共1,056只家禽被随机分配到两个实验阶段。在第1阶段（1-21 D），在饮食中补充了6种CG（0、1、3、5、7和9％），而CG以玉米为代价被补充。每个CG水平由22只鸡的8个重复样本组成。在第2阶段（22-42 D），CG的包含水平得以维持；但是，每个CG水平的4个重复样品均不含CG。在此阶段，每种处理组合均包含4次重复。包含5、7和9％的CG可提供更好的体重增加（P相对于对照组（0％CG），在第1阶段中<0.05）。与第1阶段和第2阶段（1-42天）同时接受CG的家禽相比，其体重增加，采食量降低和饲料转化率更高仅在第1阶段接受CG治疗的组（P <0.05）。在21 D岁之前接受饮食CG的鸟类比在42 D之前接受CG的鸟类具有更高的血液胆固醇和丙氨酸氨基转移酶水平。CG的水平还影响蛋白质的沉积和the体的保水率。结论是，在不影响肉的性能，血液参数和定性的前提下，肉鸡日粮中的CG含量最高可达9％。