Studies on Climate Potential Productivity of Dryland Farming in Fuxin of Liaoning Province

摘要

Based on the meteorological data for the period of 1951-2009 in Fuxin, the article estimates the photosynthesis, photo-temperature and climate potential productivity of dryland farming, and analyzes the potential productivity interannual change in crop growth period (April-September). The result shows that the long-time average value of the photosynthesis, photo-temperature and climate potential productivity are 31.89×10~4 kg/hm~2, 26.80×10~4 kg/hm~2 and 18.29×10~4 kg/hm~2 in Fuxin. The interannual change trend of potential productivity is that the photosynthesis, photo-temperature and climate potential productivity are overall reduced, the photosynthesis and photo-temperature potential productivity are not obvious, and the climate potential productivity is obvious. The monthly climate potential productivity contour map shows that the climate potential productivity changes dramatically, and the low evalue area of crop growth period has the continue expansion trend after 2009.