施肥方式对土壤CO_2释放的影响及其机理研究进展

Research progress in soil CO_2 emission affected by fertilization modes and its mechanism

采取有效的农艺措施降低农田土壤CO_2释放是当前土壤固碳研究的重点之一。本文将施肥方式与土壤CO_2释放的影响因子联系起来,对不同施肥方式下土壤呼吸温度敏感性、土壤有机碳组分含量、土壤团聚体特征及土壤微生物多样性等因素的变化进行了综述,讨论了施肥方式影响CO_2释放的机理,并对今后不同施肥方式影响CO_2释放的研究重点进行了展望,以期为降低农田土壤CO_2排放提供理论依据。

To effectively reduce soil CO2 emission from farmland through soil management practices is one of the key focus in soil carbon sequestration research. In this paper, the relationship between fertilization modes and their influences on impacting factors of soil CO2 emission was analyzed. The temperature sensitivity of soil respiration, soil aggregate characteris-tics, contents of soil organic carbon fractions, soil microbial community diversity, etc., were reviewed and the mechanism of fertilization effect on CO2 emission were discussed. The development prospects in the research of farmland soil CO2 reduction in the future were brought forward, which could provide theoretical guidance for soil carbon sequestration research.