摘要
采用扫描电子显微镜(SEM)、傅立叶变换红外光谱(FTIR)和X射线衍射(XRD)对互花米草中温(35℃) 厌氧发酵前后木质纤维结构的变化进行了对比分析。结果表明,互花米草茎秆的生物降解主要发生在维管束组织部位, 而薄壁细胞是一种生物难降解组织;发酵60 d后互花米草木质素的相对含量升高,木质素官能团所对应的FTIR光谱的特征峰的峰强与其纤维素和半纤维素所对应的特征峰的峰强的比值是发酵前的2倍以上;厌氧发酵使互花米草的结晶度有所降低,由发酵前的0.510降到了0.479。总之,木质素对纤维素和半纤维素的包裹作用,以及纤维素的结晶结构是影响互花米草厌氧生物转化的主要因素。
Lignocellulosic structural changes of Spartina alterniflora before and after anaerobic fermentation under mesophilic conditions(35℃)were characterized by scanning electron microscopy(SEM),Fourier transform infrared(FTIR) spectroscopy and X-ray diffractometer(XRD).The results of SEM microphoto analysis indicated that vascular bundle in stem of S.alterniflora was easily biodegradable tissue compared with parenchyma cell.The analyses of FTIR spectra showed that ratios of the intensity of characteristic peak of...
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第2期199-203,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
中国博士后科学基金(20060400277)
江苏省博士后科研资助计划(0602016B)
关键词
木质纤维结构
厌氧发酵
降解
互花米草
lignocellulosic structure
anaerobic fermentation
decomposition
Spartina alterniflora
