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首页> 外文期刊>Animal Feed Science and Technology >Impact of crude glycerol on feed milling characteristics of swine diets.
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Impact of crude glycerol on feed milling characteristics of swine diets.

机译：粗甘油对猪日粮饲料研磨特性的影响。

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This study evaluated the effect of crude glycerol on feed processing of nursery and finisher diets for pigs. In Exp. 1, complex nursery pig diets were mixed in a double ribbon mixer with glycerol levels of 0, 25, and 50 g/kg replacing maize on a weight basis and pelleted (74 degrees C conditioning temperature (CT) and 4.4 mm x 29 mm die size). In Exp. 2, finisher diets (maize-soybean meal based with 30 g/kg added fat) were mixed in a double ribbon mixer with glycerol included at 0, 25, and 50 g/kg replacing maize on a weight basis and pelleted (74 degrees C CT; 4.4 mm x 29 mm die size). A second control feed was pelleted at a standard CT of 85 degrees C. There were three replications per treatment for Exp. 1 and 2. In Exp. 1, flowability of mash nursery diets improved linearly (P<0.001) with glycerol. For pelleting, electrical consumption decreased linearly (P=0.02), production efficiency (P=0.01), pellet durability index (PDI, P=0.001) and modified PDI (included 3 hexagonal nuts, P<0.001) increased linearly, and hot pellet temperature after the pellet die decreased linearly (P<0.001) with increasing levels of glycerol. In Exp. 2, flowability of mash finisher diets improved linearly with increasing glycerol (P=0.03). For pelleting, increasing glycerol linearly increased pellet mill efficiency (P=0.005) and PDI (P<0.001), and decreased hot pellet temperature (P=0.05). Hot pellet temperature and PDI were greater (P<0.001) and pellet mill efficiency (P=0.06) tended to be greater for CT of 85 degrees C compared to 74 degrees C. In conclusion, glycerol supplementation improved flowability of meal and pelleting efficiency of nursery and finishing diets and required the use of a lower pelleting temperature while improving production efficiency and maintaining pellet quality.
机译：这项研究评估了粗甘油对猪苗圃和育肥猪饲料加工的影响。在实验中如图1所示，将复杂的保育猪日粮在双带式混合器中混合，甘油的含量分别为0、25和50 g / kg（按重量计），替代玉米，并制成颗粒状（74摄氏度调节温度（CT）和4.4毫米x 29毫米模具）尺寸）。在实验中如图2所示，在双带式混合器中混合整理剂日粮（基于30 g / kg添加脂肪的玉米-大豆粉），其中甘油分别以0、25和50 g / kg的重量代替玉米，并制成颗粒（74摄氏度） CT; 4.4毫米x 29毫米模具尺寸）。在85℃的标准CT下将第二份对照饲料制成颗粒。每次处理均进行三次重复实验。 1和2。如图1所示，甘油mash饲料的流动性与甘油呈线性关系（P <0.001）。对于制粒，电耗呈线性下降（P = 0.02），生产效率（P = 0.01），造粒耐久性指数（PDI，P = 0.001）和改性PDI（包括3个六角形螺母，P <0.001）呈线性增加，并且热粒料随着甘油含量的增加，颗粒死后的温度线性下降（P <0.001）。在实验中如图2所示，浆肥育日粮的流动性随甘油含量的增加而线性提高（P = 0.03）。对于制粒，增加甘油会线性增加制粒机的效率（P = 0.005）和PDI（P <0.001），并降低热制粒温度（P = 0.05）。相较于74摄氏度，85摄氏度CT的热丸温度和PDI更高（P <0.001）且制粒机效率（P = 0.06）更高。总之，补充甘油可以改善粗粉的流动性和制粒效率。育苗和后期饮食，并要求使用较低的制粒温度，同时提高生产效率并保持制粒质量。

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