Analysis on the Impact of Composting with Different Proportions of Corn Stalks and Pig Manure on Humic Acid Fractions and IR Spectral Feature
SUN Xiang-ping1, 2, LI Guo-xue2*, XIAO Ai-ping1, SHI Hong2, WANG Yi-ming2, LI Yang-yang2
1. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410125, China 2. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
Abstract：Using pig manure and corn straw as raw materials for high-temperature composting，setting three different treatments: C/N 15, C/N 25, and C/N 35. Composting period is 120 days, which contains 30 days for ventilation cycle by forced continuous ventilation. Sampled on 0, 22, 30, 60, 90, 120th days, they were analyzed by elemental analysis and IR spectroscopy to study effect of different lignin content on compost humic acid (HA) composition and molecular structure. The results showed that the change in composting humic acid C focused on the first 30 days, while after composting, the O/C of compost HA increased, H/C decreased, and N content increased. Low C/N (15) and higher C/N ratio (35) had higher degree of oxidation than the C/N 25 in compost HA. FTIR indicated that the infrared spectrum shapes with different lignin content treatment are similar during the composting process, but the peak intensity is obviously different. Research results proved that the composting stage is more conducive to enhanced aromatic in compost HA. After composting, C/N 15 had less polysaccharide and fat ingredients and more aromatic structural components in compost HA, compared with C/N 25 and 35. In addition, compost HA of C/N 15 had higher degree of humification and its structure was more stable.
孙向平1, 2，李国学2*，肖爱平1，时 红2，王熠明2，李扬阳2 . 添加不同比例玉米秸秆对猪粪高温堆肥过程中胡敏酸的结构组成及红外光谱特性影响分析 [J]. 光谱学与光谱分析, 2014, 34(09): 2413-2418.
SUN Xiang-ping1, 2, LI Guo-xue2*, XIAO Ai-ping1, SHI Hong2, WANG Yi-ming2, LI Yang-yang2 . Analysis on the Impact of Composting with Different Proportions of Corn Stalks and Pig Manure on Humic Acid Fractions and IR Spectral Feature . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(09): 2413-2418.
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