关键词: 植烟土壤, 植烟土壤, 有效硼, 空间分布, 邵阳烟区

Abstract: The author took carbon emission of city land and emission reduction measures as important evaluation indexes of city land use system health, adopted the PSR model as framework and used the method of obstacle degree and variation coefficient, conducted quantitative research on the health status of land use system in Zhengzhou City. The results showed that: (1) from 2003 to 2012, the health status of the city land use system in Zhengzhou was gradually transiting from unhealthy to critical state, the obstacle degree of the respond system decreased constantly, but the obstacle degree of pressure system kept increasing; (2) from 2003 to 2012, the obstacle degree of carbon emission in Zhengzhou declined slowly, meanwhile, the obstacle degree of low-carbon measures fluctuated, but the decline was not obvious; (3) in terms of the single factor disorder diagnosis, it indicated that, as time went on, factors such as the proportion of construction land, the growth rate of social fixed asset investment, population density and the growth amount of city carbon sink area were gradually becoming the main obstacle factors of the system, but the low-carbon index was the most important obstacle factor all the time. In order to promote the healthy development of the urban-land use system, it was necessary to change the economic growth mode, promote the diversification of city land utilization, strengthen the marketization of the city land allocation, increase the investment in environmental protection and formulate corresponding emission reduction policies with the goal of developing low-carbon city.