The Characteristics of Dissolved Organic Matter and Soil Microbial Communities in the Soils of Larix principis-rupprechtii Mayr. Plantations in the Qinling Mountains, China

Soil microorganisms and dissolved organic matter (DOM) play vital roles in nutrient cycling maintaining plant diversity. The aim of this study was to clarify the relationship between DOM component characteristics microbial community structure soil Larix principis-rupprechtii Mayr. plantations. We quantified responses stand age a plantation forest ecosystem using phospholipid fatty acid (PLFA) analyses, ultraviolet-visible spectroscopy, fluorescence spectroscopy. Three humic-like components fulvic-like were identified from samples, substances dominant stands different ages. index showed that sources ages throughout growth stages may be mostly residues, with very little contribution sources. Furthermore, results demonstrated season had significant effect on contents PLFA biomarkers L. Additionally, significantly higher species observed young (17a) than sapling (7a) half-mature (27a), suggesting differences quality quantity larch litter physicochemical affect structure. Redundancy analysis (RDA) changes driven by major drivers variations region. Overall, seasonal contribute variability microorganisms, tree will depend upon provisioning these resources.