耕地质量变化的临界警戒和评价指标体系研究

依据第二次土壤普查资料、多年土壤监测数据和有关耕地系统状态的统计数据,结合研究区耕地状况的调查分析,建立了长江三角洲地区支持压力－状态－响应模型的耕地质量评价指标体系、耕地预警系统指标体系和预警模型;在耕地非农化过程中,据此可对耕地流失进行临界警戒,并同时设立警度修正系数,对耕地价格进行实时修正。

The Study on Assessment Indicator System of Cultivated Land Quality Variation and Its Critical Alertness

Based on the second general soil survey data, long-period. soil monitoring data and relevant statistical data of cultivated land condition, integrated with the analysis of cultivated land investigation in typical area, an in- dicator system of cultivated land quality under the support of pressure-status-response model, an indicator system and warning model of cultivated land early-warning system are set up, During the cultivated land non-agricultural process, the critical alertness is taken for the cultivated land loss; the correct coefficient of the alarming degree is setup to modify the cultivated land price at the same time.