The Study On The Evaluation Of Cultivated Land’s Security At Different Levels And The Protection Systems Of Cultivated Land

Cultivated land, as a kind of precious natural resource and asset, is the basic material foundation for human survival and development. With the development of the economy and society, cultivated land resource reduced significantly because of all kinds of land occupancy by buildings, agricultural adjustment and ecological restoration et al. The total cultivated land resource are closely related to population, natural, economic and social factors, which is important to ensure the national economy, social development and food security. Therefore, the analysis and evaluation of cultivated land resource’s security, and study of dynamic changes of cultivated land resource, have a great significance for the rational use and protection of cultivated land resource. Based on the analysis of the coordination between land and people, the study was carried out from different research scales. Firstly, the paper evaluated the security situation of cultivated land resource of Hebei Province in two levels, province and county, then determined the security degrees and identified the change trend and distribution characteristics of cultivated land security. Secondly, combining with the field survey of prime farmland, this paper analyzed the cultivated land resource security in Changli County and explored the reasons of ineffective protection of cultivated land. Finally, this paper built the cultivated land protection system and put forward practical and feasible measures for protecting cultivated land. The main conclusions are as follows:(1) The paper constructied the provincial level evaluation index system according to the utilization status of cultivated land in Hebei Province, and evaluated the security status of cultivated land from 2003 to 2012. In the ten years, the comprehensive value of cultivated land resource security in Hebei Province changed from 0.6971 in 2003 to 0.7840 in 2012. The security condition was in the basic security state.(2) Build cultivated land resource security evaluation index system of the counties, evaluates the cultivated land security in 2003, 2008 and 2012 of Hebei Province. The result shows that the cultivated land security level in the three years has two main types: the security and the basic security.(3) Build the cultivated land security evaluation index system of Changli County, evaluating the cultivated land security level of Changli County in 2012 and analyze cultivated land protection status of Changli County. Overall, the comprehensive value of cultivated land security of Changli County is 0.7449, in basic security state. During 2003-2012, six years’ s cultivated land protection ratio less than 1, the effect of cultivated land protection in 10 years when HERSHEY’S bad, not stable.(4) Construct cultivated land protection system, expounded the cultivated land protection system from the protection target, content, subject, and mode, and put forward the corresponding countermeasures.