Decomposing effect of chemical-biological decomposing combined technique on rice straw and its fourier transform infrared spectroscopy

The effects of several chemical-biological combined decomposing techniques (CBCDT) on the decomposition of rice straw were studied by fourier transform infrared spectroscopy (FTIR). The results showed that under CBCDT treatments, rice straw could be better decomposed than in control. After seven days under CBCDT treatments, the straw turned into brown, and was easy to be broken down and obviously decomposed. FTIR spectra indicated that under chemical agent A-biological agent A combined treatment, hydroxyl, ketonic carbonyl, methyl, methylene, methane and aliphatic compounds decreased, proteins and amino acids completely decomposed, but aromatic compounds (specially substituted group) increased, and hence, the humification of straw was accelerated. The effects of different decomposing agents on straw were decreased in the order of chemical degrade agent A > chemical degrade agent B, biological degrade agent A > biological degrade agent B > biological degrade agent C. The chemical agent A-biological agent A combined treatment was the most effective among several treatments.