Ecological restoration and its effects on grain production in the corrasive region of loess plateau in Shanxi

The effect of ecological restoration on grain production in the corrasive region of loess plateau in Shanxi is analyzed.The 30×10~4t grain production will be decreased in the corrasive region because of the conversion from sloping plow land to forest or grassland and the 45kg grain per person will be minified according to the total agricultural population of 665×10~4 in 1999.Simultaneously,the transfer of water,fertilizer,pesticide,seeds and labor force to reserved cultivated farmland can bring more increase in grain yield.Also,the advancement in agricultural science and technology and the agricultural infrastructure construction such as reconstruct of medium or low yield farmland can promote grain production by improving the ecological environment and reduce the risk of natural disasters.The prediction shows that the total grain yield in the corrasive region in 2010 will reach 693.92×10~4t.The demand of grain based on the three levels (400kg,420kg or 450kg/person) is respectively 475.54×10~4t,499.32×10~4t and 535.01×10~4t,which are all less than the supply of grain.This suggests that the ecological restoration will not intimidate the grain security in the corrasive region of loess plateau in Shanxi,but the guard of grain security can't relax.