Effects of Land Management Practices on Labile Organic Carbon Fractions in Rice Cultivation
  • 【DOI】

    10.1007/s11769-009-0241-7

  • 【摘要】

    A research trial with four land management practices, I.e., traditional tillage-fallow (TTF), traditional till-age-wheat (TTW), conservation tillage-fallow (CTF) and conservation tillage-wheat (CTW), ... 展开>>A research trial with four land management practices, I.e., traditional tillage-fallow (TTF), traditional till-age-wheat (TTW), conservation tillage-fallow (CTF) and conservation tillage-wheat (CTW), was sampled in the 15th year after its establishment to assess the effects of different management practices on labile organic carbon fractions (LOCFs), such as easily oxidizable organic carbon (EOC), dissolved organic carbon (DOC), particulate organic carbon (POC) and microbial biomass carbon (MBC) in a typical paddy soil, Chongqing, Southwest China. The results indi-cated that LOCFs were significantly influenced by the combination of no-tillage, ridge culture and crop rotation. And,different combination patterns showed different effectiveness on soil LOCFs. The effects of no-tillage, ridge culture and wheat cultivation on EOC, DOC, POC and MBC mainly happened at 0-10cm. At this depth, soil under CTW had higher EOC, DOC, POC and MBC contents, compared to TTF, TTW and CTF, respectively. Moreover, the contents of LOCFs for different practices generally decreased when the soil depth increased. Our findings suggest that the paddy soil in Southwest China could be managed to concentrate greater quantities of EOC, DOC, POC and MBC. 收起<<

  • 【作者】

  • 【作者单位】

    College of Geography Science/College of Resource and Environment

  • 【刊期】

    中国地理科学(英文版) SCI 2009年3期

  • 【关键词】

    no-tillage  rice-wheat rotation  ridge culture  labile organic carbon fraction  rice cultivation 

  • 【基金项目】

    国家自然科学基金