Two experiments investigated the effects of lysophospholipid (LPL) supplementation on low-energy and low-nitrogenous diets for broilers. A total of 300 one-day-old male chicks (Ross 308) was allotted to 5 treatments in a completely randomized design. Each group consisted of 6 replicates with 10 birds each. Experimental diet I included positive control (PC) having 3,025 (starter), 3,150 (grower), and 3,200 kcal/kg (finisher) of ME; negative control (NC) was 150 kcal/kg of ME lower than PC, and LPL-05, LPL-10, and LPL-15 treatments were NC + 0.05%, 0.10%, and 0.15% of LPL supplementation, respectively. Experimental diet II included positive control (PC) having a formulated amount of crude protein including Lys and Met + Cys that met the Ross 308 standards; negative control (NC) was 4% lower CP and AA than PC; other treatments were supplemented with LPL at 0.05% (LPL-05), 0.10% (LPL-10), and 0.15% (LPL-15) into the NC, respectively. Experiment I showed that growth performance linearly increased as the LPL inclusion increased (P < 0.001). Broilers fed LPL-10 and LPL-15 increased digestibility of DM (P < 0.05), crude protein (P < 0.01), and total amino acids (P < 0.01) compared to NC. Serum glucose (P < 0.01) and high-density lipoprotein (P < 0.05) concentrations were greater in groups fed LPL-10 than those fed PC. Furthermore, leg muscle increased in birds fed LPL-10 compared with NC (P < 0.05). Experiment II observed a linear response to LPL supplementation in the whole period, in terms of body weight gain (P = 0.015) and feed conversion ratio (P = 0.027). Feeding of 0.15% LPL had promising effects on digestibility of crude protein and ether extract compared with NC (P < 0.01 and P < 0.05, respectively). Overall, LPL could be considered as a feed additive to reduced energy (-150 kcal/kg) or nitrogenous diets (-5%) in order to improve growth performance and nutrient digestibility without adverse effects on lymphoid organs and hepatic enzyme of broilers.

中文翻译：

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补充溶血磷脂以减少能量，粗蛋白和氨基酸饮食对肉鸡生长性能，营养消化率和血液状况的影响。

两项实验研究了溶血磷脂（LPL）补充对肉鸡低能量和低氮饮食的影响。完全随机设计将300只1天大的雄性小鸡（罗斯308）分配给5种处理方法。每组由6个重复样本组成，每组10羽。实验饮食I包括阳性对照（PC），其具有3,025（发酵剂），3,150（生长剂）和3,200 kcal / kg（精加工剂）的ME；阴性对照（NC）的ME比PC低150 kcal / kg，LPL-05，LPL-10和LPL-15的处理分别为NC +补充LPL的0.05％，0.10％和0.15％。实验饮食II包括阳性对照（PC），其具有一定量的粗蛋白，包括符合Ross 308标准的Lys和Met + Cys；阴性对照（NC）的CP和AA比PC低4％；其他治疗分别在NC中补充了0.05％（LPL-05），0.10％（LPL-10）和0.15％（LPL-15）的LPL。实验I表明，随着LPL夹杂物的增加，生长性能线性增加（P <0.001）。与NC相比，饲喂LPL-10和LPL-15的肉鸡增加了DM（P <0.05），粗蛋白（P <0.01）和总氨基酸（P <0.01）的消化率。LPL-10组的血清葡萄糖（P <0.01）和高密度脂蛋白（P <0.05）的浓度高于PC组。此外，与NC相比，饲喂LPL-10的家禽腿部肌肉增加（P <0.05）。实验二观察到整个时期对LPL补充的线性响应，以体重增加（P = 0.015）和饲料转化率（P = 0.027）表示。送入0。与NC相比，15％LPL对粗蛋白和乙醚提取物的消化率具有良好的影响（分别为P <0.01和P <0.05）。总体而言，LPL可被视为降低能量（-150 kcal / kg）或含氮饮食（-5％）的饲料添加剂，以改善生长性能和养分消化率，而不会对肉鸡的淋巴器官和肝酶产生不利影响。