Health appraisal of farmland under mechanism of urbanization drive

The health appraisal of farmland health is basic for achievement of pay equal attention on land quantity, quality and ecology, and the status of farmland health is important to guarantee of food security (production and quality). Based on the comprehensive analysis of the influence of urbanization actuation on suburb farmland, a case study was conducted in the border region between Beijing, Tianjin City and Hebei Province in China. The indicator attributes were obtained from farmland classification data, field investigation and laboratory analysis of samples. This study established an appraisal system including quality, productivity and soil environment to evaluate the health of farmland with a composite index developed by using the fuzzy evaluation model. The evaluation results showed that the health status of farmland in region mentioned above was divided into three classes, namely in perfect health, normal health and sub-health, and the index of farmland health defuzzified by centroid method ranged from 0.539 to 0.736. The status of farmland health was good in the study area, but the potential pollution risk of soil environment had risen with increased agricultural income by urbanization drive. This study indicate that the appraisal system and method are helpful and meaningful to carry out the farmland health evaluation, and the evaluating indicators degree of membership analysis can sufficiently reflect the influence of urbanization actuation on farmland health.