This study was performed to investigate the hypothesis that supplementation of processed lignocellulose (PL) in the diets of broilers has a positive effect on growing performance, pH value of gizzard, hepatic enzyme activity, immunologic indicators, histomorphological character of small intestine, and cecal microflora populations. A total of 720 one-day-old Ross 308 broiler chicks were allotted to 4 treatment groups and fed maize-soybean meal based diets. The basal diet was supplemented with PL with an amount of 0 kg (control), 0.5 kg, 1 kg, and 2 kg per ton feed. Growing performance parameters, were determined weekly until 35 D of age. Blood samples for enzyme activities and immunoglobulins, jejunum and cecum samples for histomorphological characters for villus growth, and microbial population were collected from 12 broilers from each group. At 35 D of age, body weight of broilers supplemented with 1 kg of PL was found to be the highest with a value of 2305.0 g, when compared to the broilers supplemented with control, 0,5 and 2 kg of PL groups (2154.0, 2201.0, and 2141.7 g, respectively, P = 0.001). An increased activity of aspartate amino transferase (AST) was observed in the control and 1 kg PL supplementation groups (633.6 and 597.4 IU/L, respectively), whereas alkaline phosphatase (ALP) activity was the highest in the control group (5404 IU/L, P < 0.05). Broilers in the control group had the lowest level of IgY and IgA (122.2 and 25.8 mg/dL, respectively, P < 0.05). Villus height increased by 22.0%, 40.7%, and 34.8% in 0.5, 1, and 2 kg PL supplementation groups, respectively, when compared to the control (P < 0.001). The processed lignocellulose supplemented as 1 kg of PL decreased the average count of Staphylococcaceae, E. coli, and Enterobacteriaceae, whereas it increased the population of Lactobacillus spp. in the cecum (P < 0.05). These data indicate that the supplementation of processed lignocellulose had positive effects for performance via changes in hepatic enzyme activities, immunoglobulin levels, villus growth in jejunum, and microflora in cecum.

中文翻译：

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饲喂添加加工木质纤维素日粮的肉鸡的生长性能、砂囊 pH 值、肝酶活性、免疫指标、肠道组织形态和盲肠微生物区系。

本研究旨在调查以下假设：在肉鸡日粮中添加加工木质纤维素 (PL) 对生长性能、胗 pH 值、肝酶活性、免疫学指标、小肠组织形态学特征和盲肠微生物区系有积极影响。人口。总共 720 只一天大的 Ross 308 肉鸡被分配到 4 个处理组并饲喂基于玉米-豆粕的日粮。基础日粮中每吨饲料添加 0 公斤（对照）、0.5 公斤、1 公斤和 2 公斤的 PL。每周测定生长性能参数，直到 35 日龄。从每组 12 只肉鸡中收集用于酶活性和免疫球蛋白的血液样品、用于绒毛生长的组织形态学特征的空肠和盲肠样品以及微生物种群。在 35 日龄时，添加 1 kg PL 的肉鸡体重最高，为 2305.0 g，与添加对照、0.5 和 2 kg PL 组的肉鸡相比（2154.0，分别为 2201.0 和 2141.7 g，P = 0.001）。在对照组和 1 kg PL 补充组中观察到天冬氨酸氨基转移酶 (AST) 的活性增加（分别为 633.6 和 597.4 IU/L），而碱性磷酸酶 (ALP) 活性在对照组中最高（5404 IU/ L, P < 0.05)。对照组肉鸡的 IgY 和 IgA 水平最低（分别为 122.2 和 25.8 mg/dL，P < 0.05）。与对照组相比，0.5、1 和 2 kg PL 补充剂组的绒毛高度分别增加了 22.0%、40.7% 和 34.8%（P < 0.001）。添加 1 kg PL 的加工木质纤维素降低了葡萄球菌科、大肠杆菌和肠杆菌科的平均数量，而增加了乳酸杆菌的数量。在盲肠 (P < 0.05)。这些数据表明，加工木质纤维素的补充通过改变肝酶活性、免疫球蛋白水平、空肠绒毛生长和盲肠微生物群落对性能产生积极影响。