排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Labile carbon limits in-stream mineralization in a subtropical headwater catchment affected by gully and channel erosion 总被引:1,自引:0,他引:1
Garzon-Garcia Alexandra Bunn Stuart E. Olley Jon M. Oudyn Fred 《Journal of Soils and Sediments》2018,18(2):648-659
Journal of Soils and Sediments - Gully and channel erosion are known to export large quantities of soil organic matter (SOM) to stream ecosystems. However, the implications for in-stream processing... 相似文献
2.
Damien Finn Fred Oudyn Kerrilyn Catton Ram Dalal 《Communications in Soil Science and Plant Analysis》2016,47(17):2017-2025
Labile soil dissolved organic carbon (DOC) and heat-extracted carbon (HEC) are sensitive indicators of changing soil organic carbon (SOC) stocks. Isotope ratio mass spectrometry (IRMS) is an important tool for studying SOC turnover and soil biological function. Several complications are involved in measuring DOC/HEC, for example salt ionic strength; solution pH; and anionic damage to elemental analyzer-IRMS. We evaluated a method for DOC/HEC analysis with 0.1 M potassium phosphate buffer (PPB). This method was strongly correlated with commonly used carbon (C) extractants for C quantification. Carbon-13 comparisons between DOC/HEC extracted with Milli-Q water and PPB were similar. The δ13C (‰) values of particulate OC and DOC were similar, whereas the relationship between humic OC and HEC was soil specific. An incubation experiment demonstrated that DOC/HEC δ13C (‰) successfully explained respired microbial carbon dioxide over 90 days. We conclude that this method represents an alternative for DOC/HEC quantification and δ13C (‰) analyses. 相似文献
1