摘要
利用元素分析、官能团分析和光谱(FTIR,13C-NMR)分析的方法,研究了以橄榄渣和谷物秸秆为原料堆肥过程中生成的黄腐酸,旨在跟踪堆肥的成熟度。由堆肥中萃取的黄腐酸的总氮、酸性官能团和酚羟基的含量很高,这一特性可能来源于原料的高度腐殖化并形成了缩合度较高的腐植酸复合物。FTIR,13C-NMR分析结果表明,原料中醇羟基和脂肪结构减少而芳香结构增加了,证实了上述推论。研究结果表明,堆肥在12个月后最终产品的组成达到稳定,而黄腐酸的含量可以作为堆肥成熟程度及其农业应用价值的评价指标。
Elemental, functional and spectroscopic analyses（FTIR,^13C-NMR）were performed to study fulvic acids of composted olive mill wastes plus cereal straw, in order to follow the maturity of the final product during composting. The extracted fulvic acids were characterized by high nitrogen, acidic functional group and phenolic hydroxyl contents that might have resulted from the high degree of humufication and the synthesis of more condensed humic complexes. This was confirmed by a degree of alcoholic and aliphatic structures and an increase of aromatic structures, as shown by the FTIR, ^13C-NMR analyses. The results showed that stability of the final product was reached after 12 months of composting and that fulvic acid levels could constitute an additional tool to assess final product maturity and its agronomic value.
出处
《腐植酸》
2006年第3期38-44,共7页
Humic Acid
