摘要
为探讨预处理对玉米秸秆发酵效果的影响,利用酸、碱、氧化剂等8种化学试剂对秸秆进行预处理,每处理设置3个浓度,每个浓度3个重复,以粗纤维的变化确定最佳试剂及浓度;然后加入碳源、氮源,进行平菇菌、酵母菌、芽孢杆菌等混合菌发酵,通过测定粗蛋白质、粗纤维变化确定最优工艺条件。试验结果表明:(1)经过化学试剂预处理后的秸秆,粗纤维含量均显著降低(P<0.05),其中3%硫酸组效果最佳,较未处理组降低10.27%。(2)发酵处理后,3%硫酸、7%石灰水、15%氨水预处理组的秸秆粗纤维含量显著降低(P<0.05),粗蛋白质含量显著增加(P<0.05),发酵效果显著优于未预处理组,结合生产实践,石灰水预处理方法更宜推广。
In order to investigate the effect of pretreatment on the fermentation of corn stover,eight kinds of chemicals were used to pretreat straw （acids, bases, oxiding agents） with 3 concentrations and 3 repilcates respectively.The opti- mal concentration of reagents was determined by the content of crude fiber （CF）.Then adding carbon and nitrogen,fer- mengted by mixed bacteria （falt mushrooms, yeasts, bacillus）.The optimal process conditions were measured by the change of crude protein （CP） and CF.The results showed that： （1）After pretreatment, the CF of straw was significantly decreased （P 〈 0.05）,and the effect of 3% sulfuric acid was the best,which reduced by 10.27%. （2）After fermentation,the group which was pretreated by 3% sulfuric acid,7% lime, 10% aqueous ammonia had more CP and less CF than those of non- pretreated group（P 〈 0.05）.The pretreatment method of lime was more appropriate to be promoted.
出处
《中国饲料》
北大核心
2015年第4期24-27,共4页
China Feed
关键词
秸秆
预处理
发酵
粗纤维
粗蛋白质
straw
pretreatment
fermentation
crude fiber
crude protein
