Structure and biodegradability of dissolved organic matter from Ultisol treated with long-term fertilizations

Purpose Dissolved organic matter (DOM) is a labile and reactive fraction of soil organic matter. Ultisol usually has low content of organic matter. Fertilization is a normal way in regulating the state of soil organic matter. This study aimed to investigate the effects of different fertilizations on the content, distribution, structure, and biodegradability of DOM from Ultisol.