关键词: 城市快速扩展区；耕地资源；安全；大兴区

Abstract:

Along with the economic development, functions of farmland resources have been

diversified. The most important and direct function is to protect regional grain security

and regional farmers social security. Based on farmland resources′ productive function

and social security function, this article took Daxing District of Beijing as example,

established a mathematical model according to the crop output of farmland in this

district; calculated the least farmland area which was compared with actual regional

farmland area; finally gain the status value of farmland resources security; and assessed

the security situation of farmland resources in various towns within the Districts. To

protect arable land resources of regional security, it is necessary to guarantee the most

direct production functions and social security of arable land resources at the same

time. The least farmland area and status value of farmland security could be used to

estimate the security situation of regional farmland resources. In terms of spatial

distribution, the well developed towns in Northern Daxing District are at a higher level

of insecurity. Regional agricultural should timely adjust the agricultural structure so

as to protect the safety of arable land resources.

Key words: swift-expanding urban city areas, farmland resources, security, Daxing District