天津市耕地资源态势及其相关社会经济驱动因素

从天津市50多年长序列耕地统计和土地调查资料,分析其耕地资源数量动态变化趋势、利用特征,探讨耕地资源数量变化的社会经济驱动因子及其影响机制。研究表明:1949年以来,天津市耕地资源数量在波动变化中呈减少趋势;人均耕地减少,耕地集约利用程度不断提高;部分地区耕地质量下降,耕地后备资源匮乏。人口增长、经济发展、城市化、相关政策和比较经济利益等因素,对耕地资源数量变动的驱动作用非常明显。

STUDY ON SITUATION AND ITS DRIVING FORCES OF CULTIVATED LAND RESOURCE IN TIANJIN

The main concerns of this paper are denoted to the situation of cultivated land resource utilizations and its basic process changes in Tianjin.According to the statistical and survey data of 54 years,also,the driving forces for the changes in cultivated land area is discussed.The main conclusions are shown below: there is a general trend of fluctuant decrease in cultivated land area during the last 54 years with per capital cultivated land reducing and intensive utilization rising constantly;cultivated land in Tianjin is of low quality and reserve land resource is deficient.Population growth,rapid economic development,urbanization,policy,and compared economic benefits are the dominant macro-driving force factors in cultivated land changes in Tianjin.