Abstract:

It is very important to regional food security to study the potent of grain crops produce, and futher to increase the grain yield in Gansu province, as well as whole country. Based on the analyse of the change of cropland area, grain crop area, total grain product, and grain crop yield from 1999 to 2009, the relationship among cropland area, grain crop area, total grain product and grain crop yield were discussed in this papers, to understand the main factor which affect the increases of grain crop production in Gansu province. The results showed that the cropland and grain crop area decreased firstly and then increased from 1999 to 2009, there were significantly positive linear correlation (P<0.01). The total grain crop product and grain crop yield increased fluctuantly, but the grain crop area had no significant effect on total grain crop product, the increasing of grain crop yield resulted in the increasing of total grain crop product in recent ten years. It suggested that the main approach to increase total grain crop yield of Gansu province is to increase the grain crop yield but its planting area. To realize the target to increase 250 millions ton in next 5 years in Gansu province, mainly depend on the increasing of grain crop yield on rain-fed area.