Hosseini Seyyed M, Nourmohammadi Rouhollah, Nazarizadeh Hasan, Latshaw J David
Department of Animal Sciences, College of Agriculture, University of Birjand, Birjand, Iran.
Young Researchers and Elites Club, Birjand Branch, Islamic Azad University, Birjand, Iran.
J Anim Physiol Anim Nutr (Berl). 2018 Dec;102(6):1564-1573. doi: 10.1111/jpn.12966. Epub 2018 Jul 24.
This experiment was conducted to evaluate the effects of emulsifier (Lipidol, active ingredient: lysophospholipids; LPL) and xylanase (200 mg/kg of feed) supplementation in a lower energy diet on performance, nutrient retention, intestinal morphology, blood metabolites and meat quality in broilers. A total of 360 1-day-old male chicks (Ross 308) were assigned to five treatments, with six replications of 12 birds each per treatment in a completely randomized design. The five treatments were as follows: (a) higher energy diet (HE); (b) lower energy diet (LE; energy content reduced by 100 kcal/kg compared with the HE); (c) LE + 0.10% LPL (EM); (d) LE + 200 mg xylanase/kg (ENZ); and (e) LE + 0.10% LPL + 200 mg xylanase/kg (EM + ENZ). Broilers fed HE had a higher average daily gain (ADG, day 0-24) and lower average daily feed intake (ADFI) and feed conversion ratio (FCR) from day 11 to 24 and day 0 to 24 than those fed the LE diet. Broilers fed EM or ENZ diets also had lower FCR and ADFI (day 11-24 and day 0-24) than those fed reduced-energy diets. The inclusion of 0.10% LPL and/or xylanase to the LE diet increased the apparent digestibility of dry matter (DM), nitrogen (N), ether extract (EE) and gross energy (GE), as well as villous height and ratio of villous height to crypt depth in the duodenum and jejunum. Serum free fatty acid (FFA) concentration was lower in birds fed the HE diet, compared with those fed the LE diet. The low-density lipoprotein cholesterol, total cholesterol and triglyceride concentrations were decreased by LPL supplementation. The relative weight of abdominal fat was higher in birds fed the HE diet, but lower from LPL supplementation. It was concluded that a reduced-energy diet impaired bird performance, while dietary supplementation of LPL and xylanase to reduced-energy diets positively affected productive performance, nutrient utilization, intestinal morphology and abdominal fat percentage.
本试验旨在评估在低能量日粮中添加乳化剂（Lipidol，活性成分：溶血磷脂；LPL）和木聚糖酶（200毫克/千克饲料）对肉鸡生产性能、养分保留、肠道形态、血液代谢物及肉质的影响。选用360只1日龄雄性罗斯308肉鸡，采用完全随机设计，分为5个处理组，每个处理组6个重复，每个重复12只鸡。5个处理组如下：（a）高能量日粮（HE）；（b）低能量日粮（LE；能量含量比HE组降低100千卡/千克）；（c）LE + 0.10% LPL（EM）；（d）LE + 200毫克木聚糖酶/千克（ENZ）；（e）LE + 0.10% LPL + 200毫克木聚糖酶/千克（EM + ENZ）。从第11天至24天以及第0天至24天，饲喂HE日粮的肉鸡平均日增重（ADG，0 - 24天）较高，平均日采食量（ADFI）和料重比（FCR）较低。与饲喂低能量日粮的肉鸡相比，饲喂EM或ENZ日粮的肉鸡在第11 - 24天以及第0 - 24天的FCR和ADFI也较低。在LE日粮中添加0.10% LPL和/或木聚糖酶可提高干物质（DM）、氮（N）、乙醚提取物（EE）和总能（GE）的表观消化率，以及十二指肠和空肠的绒毛高度和绒毛高度与隐窝深度的比值。与饲喂LE日粮的肉鸡相比，饲喂HE日粮的肉鸡血清游离脂肪酸（FFA）浓度较低。添加LPL可降低低密度脂蛋白胆固醇、总胆固醇和甘油三酯浓度。饲喂HE日粮的肉鸡腹部脂肪相对重量较高，但添加LPL后较低。研究得出结论，低能量日粮会损害肉鸡生产性能，而在低能量日粮中添加LPL和木聚糖酶对生产性能、养分利用率、肠道形态和腹部脂肪百分比有积极影响。
