EVALUATING GRAIN PRODUCTIVE CAPACITY OF CHINA FOR "STORING FOOD IN LAND"
构建了粮食实际生产能力评估框架，计算中国藏粮于地战略下的粮食产能，发现未来增产潜力大，其中提高复种指数贡献70%，并提出了保障机制。
From the point of stratagem of food in land,and combined with the Chinese actual situation,this paper designed the evaluation frame of grain practical productive capacity.The unused grain productive capacity is considered as constitution of food capacity currently.Using this evaluation frame,this paper calculated the grain practical productive capacity on stratagem of food in land.Result show: Practical productive capacity is 51 127.23×107kg,and increment of grain productive capacity in future is 4 180.33×107kg.The grain productivity capacity of storing food in is 8% of practical grain yield.The grain growth potential is large in our country,and increment by increasing cropping index is 70%,which is the main part of the grain productivity capacity of storing food in land.Taking 400kg grain possessing for per capita,China's grain self-sufficient ratio can increase 8 percentages,which indicated that the food security is realizable in China under the current condition of economic technology and stratagem of food in land is especially important for the food security in our country.As a conclusion,this paper brings forward the guarantee mechanism and measure to realize stratagem of food in land.Namely,constructing economic conversation mechanism of grain comprehensive productivity,increasing cropping index and strengthening agricultural science and technology devotion.