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本研究对春小麦土壤CO2排放通量与地温、土壤含水量作了相关性分析。结果表明:高茬收割免耕较传统低茬收割翻耕处理减弱了土壤CO2排放通量对地温反馈的敏感性,而高等量秸秆翻压和高等量秸秆覆盖免耕处理则表现相反。10cm土壤含水量为16.33%时土壤CO2排放通量最强,10cm土壤含水量在35%的程度上决定着土壤CO2排放通量的强弱。土壤CO2排放通量与土壤温度、土壤含水量呈正相关关系,达到极显著水平(Sig<0.01)。
In this study, we analyzed the relationship between soil CO2 flux and soil temperature and soil water content in spring wheat. The results showed that the higher tillage and no-tillage tillage reduced the sensitivity of soil CO2 flux to ground-temperature feedback compared with the conventional low-tillage harvesting, while the reverse tillage did not result from the higher tillage and the higher tillage with straw mulching. The 10% soil moisture content of 16.33% of soil CO2 flux when the strongest, 10cm soil moisture content of 35% to determine the level of soil CO2 emissions intensity. Soil CO2 fluxes had a positive correlation with soil temperature and soil water content, reaching a significant level (Sig <0.01).