State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Key Laboratory of Quality & Safety Control for Milk and Dairy Products of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Key Laboratory of Quality & Safety Control for Milk and Dairy Products of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Bioresour Technol. 2018 Apr;253:244-251. doi: 10.1016/j.biortech.2018.01.024. Epub 2018 Jan 6.
The purpose of this study was to evaluate steam explosion as a pretreatment to enhance degradation of corn stover by ruminal microbiome. The steam explosion conditions were first optimized, and then the efficacy of steam explosion was evaluated both in vitro and in vivo. Steam explosion altered the physical and chemical structure of corn stover as revealed by scanning electron microscopy (SEM) and Fourier-transform infrared (FTIR) spectroscopy, respectively, and increased its cellulose content while decreasing hemicellulose content. Steam-exploded corn stover also increased release of reducing sugars, rate of fermentation, and production of volatile fatty acids (VFAs) in vitro. The steam explosion treatment increased microbial colonization and in situ degradation of cellulose and hemicellulose of corn stover in the rumen of dairy cows. Steam explosion may be a useful pretreatment of corn stover to improve its nutritional value as forage for cattle, or as feedstock for biofuel production.
本研究旨在评估蒸汽爆破作为一种预处理方法，以增强瘤胃微生物群落对玉米秸秆的降解。首先对蒸汽爆破条件进行了优化，然后分别通过扫描电子显微镜（SEM）和傅里叶变换红外（FTIR）光谱评估了蒸汽爆破的体外和体内功效。蒸汽爆破改变了玉米秸秆的物理和化学结构，分别通过扫描电子显微镜（SEM）和傅里叶变换红外（FTIR）光谱揭示，同时增加了纤维素含量，降低了半纤维素含量。蒸汽爆破玉米秸秆还增加了还原糖的释放、体外发酵速率和挥发性脂肪酸（VFAs）的产生。蒸汽爆破处理增加了奶牛瘤胃中微生物对玉米秸秆纤维素和半纤维素的定植和原位降解。蒸汽爆破可能是一种有用的预处理方法，可以提高玉米秸秆作为牛饲料的营养价值，或作为生物燃料生产的原料。
