Abstract The objectives of the study were to: (1) assess the strength of associations of direct CO2 and N2O emissions with the seasonal variations in the relevant soil properties under both tillage systems; 2) evaluate how CT and RT affect magnitudes of seasonal CO2 and N2O fluxes from soil. Field studies were carried out on plots for conventional tillage (up to 0.22–0.25 m) and reduced tillage (up to 0.10–0.12 m) during the growing season and post-harvest period of red clover. The results showed that daily CO2 emissions significantly correlated only with soil temperature during the growing season under conventional and reduced tillage. Soil temperature demonstrated its highest influence on daily N2O emissions only at the beginning of the growing season in both tillage systems. There were no significant inter-system differences in daily CO2 and N2O emissions from soil during the entire period of observations. Over the duration of post-harvest period, water-filled pore space was a better predictor of daily CO2 emissions from soils under CT and RT. The conventional and reduced tillage did not cause significant differences in cumulative N2O and CO2 fluxes from soil.

中文翻译：

---

红三叶草生长季节和收获后期间常规犁板下肥土 Haplic Luvisol 直接 CO2 和 N2O 排放的变化和减少耕作

摘要 本研究的目的是：(1) 评估直接 CO2 和 N2O 排放与两种耕作系统下相关土壤性质的季节性变化之间的关联强度；2) 评估 CT 和 RT 如何影响土壤中季节性 CO2 和 N2O 通量的大小。在红三叶草的生长季节和收获后期间，对常规耕作（最多 0.22-0.25 m）和减少耕作（最多 0.10-0.12 m）的地块进行了田间研究。结果表明，在常规耕作和减耕情况下，每日二氧化碳排放量仅与生长季节的土壤温度显着相关。仅在两种耕作系统的生长季节开始时，土壤温度对每日 N2O 排放量的影响最大。在整个观测期间，土壤中的每日 CO2 和 N2O 排放量没有显着的系统间差异。在收获后期间，充满水的孔隙空间是 CT 和 RT 下土壤每日 CO2 排放量的更好预测指标。常规耕作和减耕没有导致土壤中累积 N2O 和 CO2 通量的显着差异。