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Feeding high-moisture corn grain silage to broilers fed alternative diets and maintained at different environmental temperatures

机译：将高水分玉米青贮饲料饲喂给肉鸡，以替代饮食喂养并维持在不同的环境温度下

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The effects of the dietary substitution of dry corn by high-moisture corn grain silage (HMCGS) were evaluated on the performance, nutrient digestibility and serum biochemical parameters of broilers reared in an alternative production system and submitted to different environmental temperatures. A total of 288 one-day-old male Cobb chicks were distributed according to a randomized block design in a 3x4 factorial arrangement: three environmental temperatures (hot, thermoneutral or cold) and four levels of HMCGS in substitution of dry corn (0%, 20%, 40% or 60%). The acid analysis showed that the evaluated HMCGS contained average percentage values of ethanol, lactic acid, and acetic acid (expressed in 100% of dry matter) of 0.7690, 2.7320 and 0.0249%, respectively. Propionic and butyric acids were not detected. Dry corn and HMCGS presented pH values of 5.8 and 3.3, respectively. The inclusion of HMCGS reduced dietary pH, as shown by the values of 5.7, 5.4, 5.1 and 4.8 recorded for the diets containing 0%, 20%, 40% and 60% of HMCGS, respectively. There was no significant interaction between diets and environmental temperature. HMCGS may replace up to 40% dry corn in broiler diets when performance, triglyceride levels, and HDL-cholesterol ratio is considered, and up to 60% when nutrient digestibility is evaluated. High environmental temperature impairs broiler performance, nutrient digestibility, and serum biochemistry, demonstrating the influence of environmental temperature on broiler metabolism and performance.
机译：在替代生产系统中饲养的，适应不同环境温度的肉鸡，评估了高水分玉米谷粒青贮饲料（HMCGS）在日粮上替代干玉米的效果，养分消化率和血清生化参数。根据3×4因子分配的随机区组设计，总共分配了288只一天大的Cobb雄性雏鸡：三种环境温度（热，热中性或寒冷）和四种水平的HMCGS代替干玉米（0％， 20％，40％或60％）。酸分析表明，所评估的HMCGS所含的乙醇，乳酸和乙酸（以干物质100％表示）的平均百分比值分别为0.7690、2.7320和0.0249％。未检测到丙酸和丁酸。干玉米和HMCGS的pH值分别为5.8和3.3。如分别包含0％，20％，40％和60％HMCGS的饮食记录的5.7、5.4、5.1和4.8值所示，HMCGS的加入降低了饮食的pH。饮食与环境温度之间没有显着的相互作用。当考虑性能，甘油三酸酯水平和HDL-胆固醇比率时，HMCGS可以替代肉鸡日粮中40％的干玉米，而当评估营养物质的消化率时，HMCGS可以替代60％。较高的环境温度会损害肉鸡的生产性能，营养物质的消化率和血清生物化学，从而证明环境温度对肉鸡的代谢和生产性能有影响。

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