Abstract:
According to the relationship between sampling sites and productivity (including theoretical productivity, accessible productivity and actual productivity) with the natural quality of agricultural land index and land use index, the cultivated land productivity models were established and the cultivated land productivity of the study area was calculated. The results showed that the theoretical productivity is 70.45×104 t，accessible productivity is 50.06×104 t and actual productivity is 32.65×104 t. Per unit area of theoretical productivity is 17 836.05 kg/hm2，per unit area of accessible productivity is 12 243.72 kg/hm2 and per unit area of actual productivity is 7 592.59 kg/hm2. The theoretical use intensity is 0.685 and accessible use intensity is 0.622.The theoretical breeding potential is 5 593.5 kg/hm2 and accessible breeding potential is 4 653.265 kg/hm2. In spatial, per unit area of theoretical, accessible and actual productivity showed significant ladder-like distribution from south to north; Per unit area of productivity is highest in the south plain region and lowest in the north hilly region. The south plain region and the middle mountain region are key regions of grain yield increment in future. The fundamental factors influencing the cultivated land productivity of Fufeng county include drought, water value, grain-breeds and so on.
