Potential of Agricultural Climatic Productivity and Requirement Rate of Climatic Resources in Northeastern China

Based on 46-year meteorological data collected from 87 meteorological stations in Northeastern China,the potentials of photosynthetic productivity,photosynthesis-temperature productivity,climate productivity as well as the requirement rate for temperature and moisture in the main three crops were calculated.The spatial differences in crop productivity potential and natural climatic resources requirement rate in the region were analyzed using GIS.The potential of photosynthetic productivity is highly associated with total solar radiation,which decreases gradually from the west to the east of the region.Due to the greater latitude span,the potential of photosynthesis-temperature productivity increases from the north to the south significantly.As the rain belt distribution has a significant zonal difference,the potential of climate productivity increases from the west to the east gradually.The temperature in the northern region and precipitation in the eastern region can better meet the demands for plants' growth.However,the potential productivity in the northern and western regions is severely limited by low temperature and precipitation.