Soybean meal (SBM) is high in antinutritional factors (ANFs), which is not conducive to the starter growth of broilers. The purpose of this study was to investigate the effects of soy protein concentrate (SPC) in starter diet on growth performance, carcass traits, meat quality, immune organ indices and blood biochemical indices of broilers. A total of 384 1-day-old Arbor Acres (AA) male broilers (46.05 ± 0.37 g) with similar body weight were randomly divided into 4 groups with 8 replicates in each group and 12 broilers in each replicate. The experiment was divided into three phases: in starter phase (1–10 d), birds were fed a corn-SBM-based basal mash diet (control) and the basal diet was supplemented with SPC at 4% (SPC4), 8% (SPC8), 12% (SPC12). In the grower phase (11–21 d) and the finisher phase (22–42 d), the birds in all four treatment groups were fed the same diets. The results showed that the body weight was significantly increased in the SPC8 and SPC12 groups of broilers at 10 d and 42 d (p < 0.05). The average daily gain was significantly increased in the SPC12 group of broilers at 1–10 d and 1–42 d (p < 0.05). The average daily feed intake was significantly increased in the SPC8 and SPC12 groups of broilers at 1-10 d (p < 0.05). The feed conversion rates at 1–42 d (p = 0.055) tended to decline in the SPC12 group. The carcass yield and the thymus indices were significantly increased in the SPC12 group of broilers at 42 d (p < 0.05). Alanine aminotransferase (ALT)/ aspartate aminotransferase (AST) tended to decline in SPC12 group at 10 d (p = 0.055) and total protein (TP) tended to increase in the SPC12 group at 42 d (p = 0.080). The contents of total cholesterol (T-CHO) and high-density lipoprotein (HDL) were significantly elevated in the SPC12 group of broilers at 42 d (p < 0.05). In conclusion, dietary inclusion of 12% SPC as a starter diet can be recommended due to the positive effects on broilers.

中文翻译：

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发酵阶段大豆浓缩蛋白对肉鸡生长性能，血液生化指标，Car体性状，免疫器官指标和肉品质的影响

豆粕（SBM）的抗营养因子（ANFs）高，不利于肉鸡的起始生长。本研究的目的是研究初学者饮食中大豆浓缩蛋白（SPC）对肉鸡生长性能，car体性状，肉质，免疫器官指数和血液生化指数的影响。将总共​​384头体重相同的1日龄Arbor Acres（AA）雄性肉鸡（46.05±0.37 g）随机分为4组，每组8个重复，每重复12个。实验分为三个阶段：在开始阶段（1-10 d），以玉米-SBM为基础的基础饲料（对照）喂鸡，基础饮食中分别添加4％（SPC4），8％的SPC。 （SPC8），12％（SPC12）。在生长期（11–21 d）和肥育阶段（22–42 d），在所有四个治疗组中的家禽都接受相同的饮食。结果表明，在10 d和42 d时，SPC8和SPC12组的肉鸡体重显着增加（p＜0.05）。SPC12组肉鸡在1–10 d和1–42 d时，平均日增重显着增加（p <0.05）。在SPC8和SPC12组的肉鸡中，平均日采食量在1-10 d时显着增加（p <0.05）。SPC12组中1-42 d的饲料转化率（p = 0.055）趋于下降。SPC12组肉鸡在42 d时体产量和胸腺指数显着增加（p <0.05）。SPC12组在10 d时丙氨酸氨基转移酶（ALT）/天冬氨酸转氨酶（AST）趋于下降（p = 0.055），而在42 d（p时，SPC12组总蛋白质（TP）趋于增加。= 0.080）。SPC12组肉鸡在第42天时总胆固醇（T-CHO）和高密度脂蛋白（HDL）的含量显着升高（p <0.05）。总之，由于对肉鸡有积极作用，因此建议在饮食中添加12％SPC作为起始饮食。