Wang Ying, Yu Jia, Li Qiang, Zhang Junfang, Naseem Sajida, Sun Bin, Tang Lin, Choi Seongho, Li Xiangzi
Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Department of Animal Science, Yanbian University, Yanji 133002, China.
Department of Animal Science, Chungbuk National University, Cheongju 28644, Republic of Korea.
Animals (Basel). 2023 Feb 28;13(5):888. doi: 10.3390/ani13050888.
Poor quality straw can be made more digestible and palatable through delignification using white rot fungi as a biological treatment in SSF. The decomposition of organic matter by white rot fungi is improved when a carbon source is added. Reducing the fermentation cycle can also help retain more nutrients in straw feed. To increase rumen digestibility and nutrient utilization, corn straw and rice straw were subjected to SSF with white rot fungi () for 21 days. The type of carbon source (glucose, sucrose, molasses, or soluble starch) was optimized, and the nutrient composition and in vitro fermentation parameters of the fermented straw were assessed. In the fermented corn straw and rice straw supplemented with different carbon sources, the results showed a decrease in lignin content, dry matter, cellulose, and hemicellulose loss, and an increase in crude protein content after 21 days. Total volatile fatty acid and ammonium nitrogen concentrations increased significantly ( < 0.01) during in vitro fermentation. Overall, the most enhanced nutritional values for corn straw and rice straw were observed after 14 days of SSF in the groups using molasses or glucose as a carbon source.
劣质秸秆可以通过在固态发酵中使用白腐真菌进行脱木质素处理，使其更易消化且口感更佳。添加碳源时，白腐真菌对有机物的分解作用会得到增强。缩短发酵周期也有助于在秸秆饲料中保留更多营养成分。为提高瘤胃消化率和养分利用率，将玉米秸秆和稻草与白腐真菌进行21天的固态发酵。对碳源类型（葡萄糖、蔗糖、糖蜜或可溶性淀粉）进行了优化，并评估了发酵秸秆的营养成分和体外发酵参数。在添加不同碳源的发酵玉米秸秆和稻草中，结果显示21天后木质素含量降低，干物质、纤维素和半纤维素损失减少，粗蛋白含量增加。体外发酵期间，总挥发性脂肪酸和铵态氮浓度显著增加（<0.01）。总体而言，在以糖蜜或葡萄糖作为碳源的组中，固态发酵14天后观察到玉米秸秆和稻草的营养价值提升最为显著。
