旱地土壤温室气体排放影响因子及减排增汇措施分析

摘要

Cropland is one of the greenhouse gas emission sources, but also a possible sink at the other side. The influence factors of greenhouse gas emission from cropland soils especially from upland soils, including soil temperature, soil moisture, soil properties, fertilization and tillage methods, were reviewed. The possible mitigation practices which include optimum nitrogen fertilization management, nitrification inhibitor usage and carbon sink, enhancement measures which include manure amendment, returning straw to the soil, conservation tillage were put forward. The implement possibilities and possible extension problems were analyzed too.%农田既是主要的温室气体排放源之一,也是潜在的碳汇.本文分析了影响农田土壤特别是旱地农田土壤中二氧化碳和氧化亚氮排放的主要影响因子,包括土壤温度、土壤水分、土壤特性以及施肥与耕作等人为因素；提出了施用有机肥、合理施用氮肥、保护性耕作、秸秆还田、使用抑制剂等农业土壤减排增汇的主要措施,并对其操作和实施的可行性进行了剖析.