摘要
通过长期田间定位试验，研究了各级土壤团聚体中不同形态有机碳的分布模式，以及耕作方式的影响．实验结果是：两种耕作方式下，土壤总有机碳（TOC）、DOC和POC在〉2．0mm粒级到〈0．053mm粒级团聚体中，均呈倒V字形分布，具有相同的分布模式，且主要富集在2．0～0．25mm团聚体中．结果表明：土壤团聚体中各种形态的有机碳在不同大小团聚体中的分布模式主要由土壤团聚体本身的性质决定，耕作方式的影响不显著；常规耕作降低了土壤中有机碳的含量，垄作免耕则能有效地保护土壤中的有机碳．
The distribution of different forms of organic carbon in soil aggregates and the effects of tillage methods on them were investigated in a long term field experiment. The result showed that with any of the tillage methods studied, various forms of organic matter in the soil particles all exhibited a V-shaped distribution pattern, and their enrichment was mainly in 2.0-0.25 mm aggregates, suggesting that tillage methods did not significantly affect the distribution pattern of different forms of organic matter in the soil particles. Compared with conventional tillage, no-tillage and ridge culture effectively protected the contents of organic matter in the soil.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期126-130,共5页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(40501033)
关键词
有机碳
团聚体
耕作
organic carbon
aggregate
cultivation
