水土保持学报2013，Vol.27Issue(4)：268-272,5.
氮沉降对杉木人工林土壤团聚体及其有机碳分布的影响
Distribution of Water-stable Aggregates and Organic Carbon in Response to Simulated Nitrogen Deposition in a Chinese Fir Plantation
摘要
Abstract
The effects of 8-year-long simulated nitrogen deposition on the distribution of water-stable aggregates and concentrations of soil organic carbon in a Chinese fir plantation located in Sanming,Fujian province were investigated.Nitrogen loadings were designed N0(control),N1,N2 and N3 at the doses of 0,60,120,240 kg/hm2,respectively.Bulk soil samples was separated into six aggregate-sizes(＞2 mm,1～2 mm,0.5～1 mm,0.25～0.5 mm,0.053～0.25 mm and ＜0.053 mm) and the associated soil organic carbon contents were determined.Results showed that the size groups of soil water-stable aggregates were in the order of 1～0.5 mm,＞2 mm,2～1 mm,0.5～0.25 mm,0.25～0.053 mm,＜0.053 mm.Compared with the control(N0),N1 and N2 treatments significantly increased the content of water-stable aggregates (＞ 0.25 mm) and soil aggregates mean weight diameter,but N3 treatment showed inhibition effect.Contents of soil organic carbon was highest in ＞2 mm fraction of soil aggregates,but no significant difference was found among treatments.Nitrogen additions promoted carbon stocks of soil water-stable aggregates,which was highest in N1 treatment.Results indicated that increasing of nitrogen deposition would increase the potential of soil carbon sequestration in the subtropical regions.关键词
氮沉降/水稳性团聚体/有机碳/碳储量/杉木人工林Key words
nitrogen deposition/ water-stable aggregate/ organic carbon/ carbon storage/ Chinese fir plantation分类
农业科技引用本文复制引用
郭虎波,袁颖红,吴建平,樊后保,刘文飞,黄荣珍,房焕英..氮沉降对杉木人工林土壤团聚体及其有机碳分布的影响[J].水土保持学报,2013,27(4):268-272,5.基金项目
国家自然科学基金项目(31060109,31200406) （31060109,31200406）
江西省自然科学基金项目(20122BAB204021) （20122BAB204021）
江西省教育厅科技落地计划项目(KJLD12097) （KJLD12097）
