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首页> 外文期刊>Animal Feed Science and Technology >Rumen disappearance kinetics and chemical characterization of by-products from cellulosic ethanol production.
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Rumen disappearance kinetics and chemical characterization of by-products from cellulosic ethanol production.

机译：纤维素乙醇生产副产物的瘤胃消失动力学和化学表征。

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Cellulose-rich biomasses can be used as an alternative to starch-rich corn grain as a source of sugars for ethanol (EtOH) production. However, converting cellulosic biomass to ethanol produces large quantities of co-products which need to be disposed of, preferably in a value-added process, possibly as animal feed. In order to estimate the feeding value of these co-products for ruminants, the chemical composition and ruminal in sacco disappearance of five mature forages (i.e., reed canary grass hay, timothy hay, alfalfa hay, corn stover, barley straw) were determined following no treatment (control), or treatment with ammonia fiber explosion (AFEX) or AFEX plus enzymatic hydrolysis of cellulose and hemicellulose (AFEX+ENZ). AFEX treatment alone doubled the N content of forages compared with controls. AFEX+ENZ-treated forages contained a similar level of N as the AFEX-treated forages. Acid-detergent insoluble N (ADIN) was twice as high in AFEX+ENZ-treated as in the AFEX-treated forages. The AFEX+ENZ-treated forages had 32% less neutral detergent fiber (NDF) and 18% less ADF than the controls. Effective ruminal disappearance of dry matter (DM), NDF, and N were higher (P<0.05) for AFEX+ENZ-treated forages than for untreated forages (719 g/kg versus 322 g/kg, 501 g/kg versus 200 g/kg, and 839 g/kg versus 437 g/kg, respectively). AFEX+ENZ treatment increased the N content and disappearance of plant constituents, but reduced the content of the major structural carbohydrates (ADF and NDF). The AFEX+ENZ-treated forages could therefore be considered for use as a non-protein N supplement in combination with high energy diets low in ruminally degradable protein.
机译：富含纤维素的生物质可以用作富含淀粉的玉米籽粒的替代品，作为乙醇（EtOH）生产糖的来源。然而，将纤维素生物质转化为乙醇会产生大量的副产物，这些副产物最好作为增值过程加以处理，最好作为动物饲料处理。为了估计这些副产品对反刍动物的摄食价值，对五个成熟草料（即芦苇，金丝雀草，提摩太草）的化学成分和瘤胃中糖原的消失进行了评估。在不进行任何处理（对照）或氨水爆炸（AFEX）或AFEX加上纤维素和半纤维素酶水解处理（AFEX + ENZ）的情况下，确定干草，苜蓿干草，玉米秸秆，大麦秸秆。与对照相比，仅AFEX处理就能使草料中的N含量增加一倍。 AFEX + ENZ处理过的草料含有的氮含量与AFEX处理过的草料相似。 AFEX + ENZ处理的酸洗剂不溶氮（ADIN）是AFEX处理的草料的两倍。经AFEX + ENZ处理的草料比中性洗涤剂纤维（NDF）少32％，而ADF少18％。 AFEX + ENZ处理的草料的干物质（DM），NDF和N的有效瘤胃消失比未处理的草料高（P <0.05）（719 g / kg与322 g / kg，分别为501克/千克和200克/千克，以及839克/千克和437克/千克。 AFEX + ENZ处理增加了N含量和植物成分的消失，但减少了主要结构性碳水化合物（ADF和NDF）的含量。因此，经AFEX + ENZ处理的草料可被视为非蛋白质N补充剂，​​与反刍动物可降解蛋白质含量低的高能量饮食配合使用。

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