乳酸菌复合系SFC-2处理水稻秸秆的效果

以处理农作物稻秆,减轻环境压力为目的,将本实验室筛选的乳酸菌复合系SFC-2接种到水稻秸秆,研究了其饲料化效果.结果表明,接种处理与未接种处理相比外观上颜色发黄发亮,松软酸香,发酵30 d后,接种处理的pH降至3.8,对照为4.1.同时发酵料中乳酸生成量增加,尤其是L-乳酸增加了约2倍,粗蛋白含量提高了10.16%,粗纤维含量降低了3.2%.通过变性梯度凝胶电泳（DGGE）分析发酵过程中微生物菌系变化,接种SFC-2后,复合系中的主要组成菌Lactobacillus plantarum,Lactobacillus fermentum和Lactobacillus paracasei等菌株迅速成为发酵料中的优势菌群,相应未接种对照中可见的Enterobacter sakazakii, Pantoea agglomerans, Enterobacter endosymbiont, Pantoea ananatis等杂菌被抑制,发酵品质得到明显改善.

Effects of a Lactic Acid Bacteria Community SFC-2 Treated on Rice Straw

Aimed to utilize rice straw and lessen the pressure of environment, the rice straw was used as the fermentation material, and a lactic acid bacteria community SFC-2 from my laboratory was inoculated into the rice straw to investigate the inoculation effects. After 30 days fermentation, the inoculated fermented straw smelt acid-fragrant, and the pH value was 3.8, which was lower than the control of 4.1. Furthermore, lactic acid concentration was more than that in the control. Especially L-lactic acid concentration was two times more than in the control, and the crude protein content was 10.16% higher than that in the control, and the crude fiber content was 3.2% lower than that in the control. From the patterns of denaturing gradient gel electrophoresis (DGGE), Lactobacillus plantarum, Lactobacillus fermentum and Lactobacillus paracasei rapidly became the advantageous species in the inoculated straws. However,Enterobacter sakazakii, Pantoea agglomerans, Enterobacter endosymbiont, Pantoea ananatis, which were predominate in the controls, were not detected in the inoculated straws, and the fermented quality was improved significantly.