期刊论文

Lin, W.-S.

中文

应用生态学报

1001-9332

2017

28

1

1-11

10.13287/j.1001-9332.201701.028

This work was supported by the National Natural Science Foundation of China (31130013).

本校为其他机构

为探究氮沉降对亚热带杉木人工幼林土壤溶液可溶性有机物质(DOM)浓度及光谱学特征的影响,采用负压法,对0~15和15~30 cm土层土壤溶液DOM进行了2年的动态监测及光谱学特征研究.结果表明:氮沉降显著减少了各土层土壤溶液可溶性有机碳(DOC)浓度,增加了芳香化指数(AI)及腐殖化指数(HIX),但对可溶性有机氮(DON)无显著影响.土壤溶液DOM浓度存在明显的季节变动,夏秋季显著高于春冬季.傅里叶红外光谱结果表明,森林土壤溶液DOM在6个区域的相似位置存在吸收峰,其中1145~1149 cm~(-1)的吸收峰最强.三维荧光光谱表明,DOM主要以类蛋白质物质(Ex/Em = 230 nm/300 nm)和微生物降解产物(Ex/Em = 275 nm/300 nm)为...

To study the effects of nitrogen deposition on the concentration and spectral characteristics of dissolved organic matter (DOM) in the forest soil solution from the subtropical Cunninghamia lanceolata plantation, using negative pressure sampling method, the dynamics of DOM in soil solutions from 0-15 and 15-30 cm soil layer was monitored for two years and the spectroscopic features of DOM were analyzed. The results showed that nitrogen deposition significantly reduced the concentration of dissolved organic carbon (DOC), and increased the aromat...