摘要
利用北京市门头沟区2001年、2008年两期土地利用现状数据库,在GIS技术支持下,选取与耕地演化相关的坡度、距居民点的距离、距交通干线的距离等地理因子,分析了2001年-2008年间门头沟区耕地流出和流入的情况,并以村域数据为基础,度量耕地利用变化与农民人均分配收入变化的耦合关系。结果表明:0-2°是耕地流失最为集中的坡度区间,随着距居民点的距离增加,耕地流失率呈现持续下降的趋势,耕地的流出与流入均与交通道路的分布有密切的关系,新增耕地整体上向居民点的外围空间扩散,且整体质量状况不佳,随着耕作半径的扩大,很容易被弃耕。从村域耕地与人均分配收入的演变情况来看,耕地理性减少的村庄有87个,耕地非理性减少的村庄有36个,耕地非理性增加的村庄有14个,耕地理性增加的村庄有27个。最后,从耕地保护的制度、理念创新和土地整治等方面提出推动都市山区耕地资源可持续利用的策略。
Beijing is facing many land use problems brought by fast economic growth, especially in the mountainous areas. Many researchers have attached great importance to the studies of cultivated land change. Taking Mentougou District （a typical mountainous area in Beijing） as a case, based on the detailed data of land use status quo （2001, 2008） and the conversion matrix of cultivated land data among other land use types from 2001 to 2008, we selected several geography factors such as slope related to the change and distances away from rural settlements and traffic lines to analyze the evolution trends of cultivated land in this District with the support of GIS technology. Theoretically, coupling relationship between income of rural residents and cultivated land conversion may affect the sustainability of agricultural production and rural development. Coupled with the relationship between average income of rural residents and cultivated land conversion matrix, rationality of cultivated land changes were quantitatively measured based on village-level statistical data. The results indicate that areas with slopes between 0~2° are mostly bothered by cultivated land loss, which decreased continuously with the increase of distances away from rural settlements. Conversions of cultivated land also show close relationship with the distribution of traffic roads. Newly added cultivated lands tend to expand around rural settlements and traffic lines, but they are of high probability for being abandoned due to enlarged farming radius and low quality. After coupling the cultivated land conversion matrix and income of rural residents, the rationality of cultivated land change was divided into four types, namely irrational increase, irrational decrease, rational increase and rational decrease. The increasing rate of rural residents’income in 87 villages exceeds corresponding decreasing rate of cultivated land and they belong to rational decrease type. 36 villages fall into the type of irrational decrease for the increasing rate of rural residents’income is lower than corresponding decreasing rate of cultivated land. Because of the marginality of newly added cultivated land, 14 villages are classified as irrational increase type for the increasing rate of cultivated land is higher than that of rural residents ’income. Conversely, 27 villages are of rational increase type. At the end of this paper, strategies about how to use system to protect cultivated land, how to innovate the protection concept and how to consolidate the land were put forward to prompt the sustainable utilization of cultivated land resource in metropolitan mountainous areas.
出处
《资源科学》
CSSCI
CSCD
北大核心
2012年第3期459-467,共9页
Resources Science
基金
北京市自然科学基金项目(编号:6082015)
教育部人文社会科学研究项目(编号:09YJCZH091)
关键词
耕地
流向
持续利用
门头沟区
Cultivated land
Conversion
Sustainable utilization
Mentougou District
