期刊论文

中文

生态学杂志

1000-4890

2013

32

7

1698-1702

10.13292/j.1000-4890.2013.0362

国家自然科学基金项目(41001141,31100381)； 国家“十二五”科技支撑计划课题项目(2012BAD14B17)资助；

本校为第一机构

通过选取亚热带5种不同母质发育的稻田土壤(黄泥田I、黄泥田II、麻砂泥、红黄泥、河沙泥),按土壤发生层次采集剖面样品,研究土壤溶解性有机碳(DOC)的剖面分布特征及其与土壤有机碳(SOC)的关系,并探讨DOC的剖面迁移规律及影响因素。结果表明:稻田土壤剖面DOC含量介于13.61-90.34 mg.kg~(-1),以耕作层(A/A_a和A_p)最高,平均达到69.40 mg?kg~(-1),耕作层以下相对较低。除河沙泥外,其余4种稻田土壤剖面DOC含量并未随土层深度的增加而逐渐降低,而是在渗育层(P)及以下的某些土层(如W_e/W_2层、C层)出现DOC含量较上一层次升高的现象。这可能与稻田土壤剖面特殊的DOC淋溶和淀积、生物降解、矿物相吸附和...

Five subtropical paddy soils developed from different parent materials （reddish yellow clayey soil I, reddish yellow clayey soil II, granitic sandy soil, red clay soil, and alluvial sandy soil） were chosen, and samples were collected according to soil genetic horizons, aimed to investigate the profile distribution characteristics of dissolved organic carbon （DOC） in subtropical paddy soils, and to approach the profile shift patterns of DOC and related affecting factors. In the test soils, the DOC content in the profiles ranged from 13.61 to...