保护性耕作对农田土壤有机碳及农业生产力的影响

Effects of Conservation Tillage on Soil Organic Carbon and Agricultural Productivity

农田土壤有机碳库作为陆地生态系统中受人类影响最大的碳库,其恢复对于增强土壤质量,保障粮食安全,涵养水源,减少大气CO_2排放具有重要意义。保护性耕作对减少水土流失,增加土壤有机碳、增加农作物产量等方面有显著效果。笔者综述了保护性耕作对农田土壤有机碳及土壤理化性质的影响,探讨了保护性耕作对农业生产力的影响,对保护性耕作存在的问题提出了改进建议,为合理制订耕作措施和农业生产管理措施提供了科学依据。

Farmland soil organic carbon pool is the carbon pool affected by human mostly, its recovery hasimportant significance on soil quality enhancement, food security guarantee, water conservation and CO2 emission decrease. Conservation tillage has significant effect on the decrease of water and soil loss, theincrease of soil organic carbon and the increase of crop yield. The authors summarized the influence ofconservation tillage on soil organic carbon and soil physical and chemical properties, discussed its effect onagricultural productivity, put forward improvement suggestions based on the problems existing in theconservation tillage, and provided scientific basis for reasonable cultivation measures and agriculturalmanagement.