【摘要】 应用经典统计学方法，选取吉林省16个典型市县2016—2019年测土配方施肥和耕地质量监测项目数据以及2017年轮作休耕试点项目采集的28 820个旱田表层(0～20 cm)土壤样点数据，分析吉林省半干旱、半湿润、湿润农业生态区的土壤有机碳、全氮和碳氮比的空间分布特征。结果表明，吉林省主要旱田土壤有机碳和全氮含量及其变化范围均呈现半干旱农业生态区<半湿润农业生态区<湿润农业生态区的空间分布特征，土壤碳氮比表现为湿润农业生态区<半湿润农业生态区<半干旱农业生态区的空间分布特征。半湿润农业生态区应注重提高氮肥利用率和氮肥管理水平，并继续大力推广秸秆还田技术；半干旱农业生态区应在做好抗旱保墒的基础上，合理调控氮肥施用量，施用腐熟后的有机物料；湿润农业生态区应在合理减少氮素投入的同时，秸秆还田结合增施有机肥，增加有机碳的归还。更多还原

【Abstract】 Using classical statistical methods, the spatial distribution characteristics of soil organic carbon, total nitrogen and carbon nitrogen ratio in semi arid, semi humid and humid agro ecological regions of Jilin Province were analyzed by selecting 28 820 soil samples collected from the soil testing formula fertilization and farmland quality monitoring project in 16 typical cities and counties in Jilin Province from 2016 to 2019 and the rotation and fallow pilot project in 2017.The results showed that the content and variation range of soil organic carbon and total nitrogen in the main dry fields in Jilin Province showed the spatial distribution characteristics of semi-arid agro ecological area < semi humid agro ecological area < humid agro ecological area, and the soil carbon-nitrogen ratio showed the spatial distribution characteristics of humid agro ecological area < semi humid agro ecological area < semi-arid agro ecological area.The semi humid agro-ecological area should pay attention to improving the utilization rate of nitrogen fertilizer and the level of nitrogen management, and continue to vigorously promote the technology of straw returning to the field; On the basis of drought resistance and moisture conservation, the amount of nitrogen fertilizer should be reasonably regulated and the decomposed organic materials should be applied in the semi-arid agro-ecological area; in the humid agro-ecological area, we should reasonably reduce the input of nitrogen, return straw to the field, increase the application of organic fertilizer and increase the return of organic carbon.更多还原