Abstract:

ccording to economy growth law and development stages，it is unavoidable that the cultivated land will reduce in the Yangtze River Delta as a central area for economy growth in China. The change of grain yield and cultivated land reduction with the economy development in the delta was analyzed by using method of correlation. A conclusion can be drawn that a high peak value of cultivated land conversion rate will appear in the period of “11th fiveyear plan”. Based on national food security judgment, development forecast and the relation between cultivated land and national food security, some suggestions were put forward to protect cultivated land: positive protection policy must be inforced in the Yangtze River Delta during the period of “11th fiveyear plan”, and protection policy should be turned out into strict control during the period of “12th fiveyear plan”. Furthermore, some countermeasures on cultivated land protection were suggested, such as to qualitatively protect cultivated land, to protect ecolandscape function, to increase the exploitation of reserve resource, to reduce nonagricultural cultivated land occupation, and to strengthen the policy management.

Key words: he Yangtze River Delta, national food security, cultivated land protection