论文部分内容阅读
山区耕地资源可持续利用关系到区域粮食安全和生态安全,研究山区耕地利用变化意义重大。采用土地空间数据、农户调查和统计数据,分析了仁怀市2005-2011年耕地边际化特征及其驱动因素。结果表明:1)6年间仁怀市有3095.76 hm2的耕地向林地、自然保留地转移,占耕地面积的5.45%,耕地边际化特征显著。2)山区耕地边际化受地形、劳动力、经济等因素影响。坡度大的耕地更易发生退耕,仁怀市发生边际化的耕地中坡度>15°的占62.26%;山区乡村劳动力非农就业率和农民年人均收入越高,耕地边际化发展速度越快;经营效益低是耕地边际化的根本原因。3)耕地边际化有利于山区生态环境保护和区域可持续发展,但导致坡耕地低效利用,应探索一种达到发展生产和保护环境双赢的坡耕地利用模式。
The sustainable utilization of cultivated land resources in mountainous areas is related to regional food security and ecological security. It is of great significance to study the changes of cultivated land use in mountainous areas. Using the spatial data of land, household surveys and statistical data, the characteristics and driving forces of cultivated land marginalization in Renhuai City from 2005 to 2011 were analyzed. The results showed that: 1) 3095.76 hm2 of arable land in Renhuai City was transferred to the forest land and natural reserve within 6 years, accounting for 5.45% of the arable land area, with significant marginalization of cultivated land. 2) The marginalization of cultivated land in mountainous areas is affected by factors such as topography, labor force and economy. The farmland with larger slope is more likely to be converted into farmland, while the marginalized cultivated land in Renhuai City accounts for 62.26% with slope> 15 °. The non-agricultural employment rate of rural labor force and the per capita income of farmer are higher, and the marginalization of cultivated land development is faster. The low benefit is the fundamental reason for the marginalization of cultivated land. 3) The marginalization of cultivated land is beneficial to the ecological environment protection and sustainable development of the mountainous area, but it leads to the inefficient use of the sloping farmland. Therefore, it is necessary to explore a utilization model of sloping land that achieves win-win development and production and environmental protection.