论文部分内容阅读
利用吉林省主要农区34个气象站1981~2010年作物生长季月气温、月降水资料和典型站点玉米农田土壤湿度旬资料,采用数理统计分析方法,分析了生长季气温和降水变化及其与玉米农田土壤湿度的关系。结果表明:1981年以来,吉林省各农区作物生长季气温升高、降水减少、玉米农田土壤湿度下降,且各农区气温升高、中部农区降水减少、中部和中东部农区玉米农田土壤湿度下降是突变现象,突变发生在20世纪90年代。各农区玉米农田土壤湿度与降水关系较密切,与气温关系以西部、中部农区较为密切;生长季气温升高、降水减少是导致玉米农田土壤湿度下降的主要气候因素。
Based on the monthly temperature of the growing season, the monthly precipitation and the data of soil moisture of corn farm in 34 weather stations in main agricultural areas of Jilin Province from 1981 to 2010, mathematical and statistical methods were used to analyze the changes of air temperature and precipitation in growing season Relationship between Soil Moisture in Cornfield and Farmland. The results show that since 1981, the crop growing season in all the agricultural areas in Jilin Province has been characterized by the increase of temperature, the decrease of precipitation, the decrease of soil moisture in the corn farmland, and the increase of air temperature in all agricultural areas, the decrease of precipitation in the agricultural areas of central China, Soil moisture decline is a mutation phenomenon, the mutation occurred in the 1990s. The relationship between soil moisture and precipitation is more closely related to the precipitation of corn farmland in each agricultural area. The relationship between temperature and the temperature in the western and central rural areas is more closely. In the growing season, the increase of air temperature and the decrease of precipitation are the main climatic factors that cause the soil moisture of corn farmland to decline.