Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China.
State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
Bioresour Technol. 2021 Oct;337:125392. doi: 10.1016/j.biortech.2021.125392. Epub 2021 Jun 10.
To improve the utilization efficiency of corn stover , steam explosion pretreatment and cellulase/lactic acid bacteria-assisted ensilage storage were conducted in sequence, mainly focusing on morphological structure, lignocellulose fraction, cellulose accessibility and degradation profile. The results showed that there was a synergistic effect of steam explosion and ensilage storage, where hemicellulose of corn stover was partly degraded during steam explosion processing (70%) or ensilage storage (20-40%). Meanwhile, its morphological structure was apparently broken, increasing cellulose accessibility (2.44, 2.83, 4.08-4.33 mg/g), where enzyme YDL and inoculant QZB were the two most effective additives. Furthermore, rumen effective degradability of corn stover (39.25%, 48.33%, 52.57-54.07%) were increased along with greater rapid degradation fraction (0, 1.67%, 9.16-11.62%) and degradation rate of slow degradation fraction (0.020, 0.034, 0.039-0.048 h) . In conclusions, it is suggested that treating corn stover with steam explosion processing and ensilage storage is a feasible way to improve its utilization efficiency.
为了提高玉米秸秆的利用效率，依次进行蒸汽爆破预处理和纤维素酶/乳酸菌辅助青贮储存，主要关注形态结构、木质纤维素组分、纤维素可及性和降解特性。结果表明，蒸汽爆破和青贮储存存在协同作用，玉米秸秆的半纤维素在蒸汽爆破处理（70%）或青贮储存（20-40%）过程中部分降解。同时，其形态结构明显被破坏，增加了纤维素的可及性（2.44、2.83、4.08-4.33mg/g），其中酶 YDL 和接种剂 QZB 是两种最有效的添加剂。此外，随着快速降解部分（0、1.67%、9.16-11.62%）和慢速降解部分（0.020、0.034、0.039-0.048h）的降解率增加，玉米秸秆的瘤胃有效降解率（39.25%、48.33%、52.57-54.07%）也得到提高。综上所述，建议采用蒸汽爆破处理和青贮储存的方法来提高玉米秸秆的利用效率。
