氮磷添加对土壤有机碳的影响: 进展与展望

冯继广, 张秋芳, 袁霞, 朱彪

Effects of nitrogen and phosphorus addition on soil organic carbon: review and prospects

FENG Ji-Guang, ZHANG Qiu-Fang, YUAN Xia, ZHU Biao

表2 固态13C核磁共振波谱技术测定的土壤有机碳功能团及其主要形式与特性

Table 2 Functional carbon (C) groups measured by solid-state 13C nuclear magnetic resonance spectroscopy and their dominant C forms and characteristics

碳功能团 Functional group 化学位移 Chemical shift (δ) 碳的主要形式 Dominant forms of carbon 特性 Characteristic 烷基碳 Alkyl C 0-45 主要为脂肪族化合物等, 来自于植物角质、蜡质、木栓质 Mainly aliphatic compounds, originating from plant cutin, waxes, suberin 较稳定, 不易被分解, 为难分解碳 Relatively stable, not easy to be decomposed, and categorized as the recalcitrant C 烷氧碳 O-alkyl C 45-110 主要为碳水化合物, 如纤维素、半纤维素等 Mainly carbohydrates, such as cellulose, hemicellulose, etc. 容易被分解, 为易分解碳 Easy to be decomposed, and categorized as the easily- decomposed C 芳香碳 Aromatic C 110-165 主要为单宁、木质素等 Mainly tannin, lignin, etc. 难以被分解, 为难分解碳 Difficult to be decomposed, and categorized as the recalcitrant C 羰基碳 Carbonyl C 165-210 大多为脂肪酸、氨基酸、酰胺、酯、酮醛类物质 Mostly fatty acids, amino acids, amide, esters, ketones and aldehydes 容易被分解, 为易分解碳 Easy to be decomposed, and categorized as the easily- decomposed C