期刊论文

Comparison of Dissolved Organic Carbon Contents in Forest Soils Extracted by Different Agents

中文

土壤

0253-9829

2020

52

3

518-524

10.13758/j.cnki.tr.2020.03.014

国家自然科学基金项目(31470629)资助。

本校为第一机构

为了解亚热带森林土壤溶解性有机碳(DOC)的特征规律,采用培养离心的方法获取土壤溶液测得DOC含量,对比传统水溶性有机碳(WSOC)提取法间的差异。选取湖南大山冲森林公园保存完好的3种亚热带典型次生林地,按10cm一层采集剖面土壤,采用不同方法提取测定土壤DOC和WSOC含量,分析与土壤理化指标的相关性及方法间的显著性关系。结果表明:①典型森林土壤DOC或WSOC含量随土壤剖面深度的增加,呈显著下降趋势。培养离心提取测得的土壤DOC含量明显较低,仅0.82~9.52 mg/kg,超纯水浸提的风干土WSOC含量达10.56~249.19 mg/kg,而0.5 mol/L K_2SO_4提取的鲜土WSOC含量达155.70~576.94 mg/kg,0.5mol/L K_2SO_4浸提...

0-10 cm soil samples were collected under three secondary forests in Dashanchong Forest Park in Hunan,the contents of dissolved organic carbon(DOC)and water-soluble organic carbon(WSOC)were measured with different extraction agents.The results showed that:1)DOC and WSOC contents were decreased significantly with the increase of soil depth.DOC content measured by cultivation-centrifugation method was the lowest(only 0.82-9.52 mg/kg),followed by WSOC content extracted by ultra-pure water in air-dried soils(10.56-249.19 mg/kg),WSOC contents extracted by K_2SO_4 in fresh and air-dried soils were t...