1950-2013年三江平原东北部耕地分布变化特征分析

发布时间：2018-03-30 01:07

  本文选题：耕地分布　切入点：旱地　出处：《干旱区资源与环境》2017年12期

【摘要】：耕地是农业发展的重要物质基础,科学判定耕地分布变化特征,对促进耕地保护及优化布局等方面具有重要意义。文中以1950、1960和1976年MSS影像、1986和1996年Landsat TM影像、2005年为中巴地球资源卫星二号星遥感数据和2013年Land Sat8 OLI遥感影像为数据源,运用耕地利用动态度、核密度计算等研究方法,对1950-2013年三江平原东北部耕地分布变化特征及驱动因素进行分析。结果表明:1950-1986年耕地增加由19.62×10~4hm~2增加至145.85×10~4hm~2,新增耕地主要源于未利用地、草地和林地,耕地转化为其他地类的数量为3.07×10~4hm~2;1986年-2013年耕地增加了93.04×10~4hm~2,有71.70×10~4hm~2旱地转换为水田,同时8.25×10~4hm~2水田转换为旱地;63年间,耕地分布密度值显著增加,水田分布密度最大值高于旱地。据此,加强水土资源优化配置,通过土地整治增加有效耕地面积是三江平原东北部未来发展的必由之路。
[Abstract]:Cultivated land is an important material basis for agricultural development. It is of great significance to promote the protection of cultivated land and to optimize the layout of cultivated land. In this paper, the Landsat TM images of 1950, 1960 and 1976, Landsat TM images of 1986 and 1996, and Land Sat8 OLI remote sensing data of China and Brazil Earth Resources Satellite 2 in 2005 and 2013, respectively, are used as data sources. Using research methods such as cultivated land use dynamics, calculation of nuclear density, The characteristics and driving factors of cultivated land distribution in northeast Sanjiang Plain from 1950 to 2013 were analyzed. The results showed that the cultivated land increased from 19.62 脳 10~4hm~2 to 145.85 脳 104hmm-2 in 1950-1986, and the new cultivated land was mainly derived from unused land, grassland and woodland. The number of cultivated land converted into other land species was 3.07 脳 10 ~ (4) h ~ (-2), and the cultivated land increased by 93.04 脳 10 ~ (4) h ~ (-2) from 1986 to 2013, and 71.70 脳 10~4hm~2 dry land was converted into paddy field. During the 63 years of transformation from 8.25 脳 10~4hm~2 paddy field to dry land, the density of cultivated land distribution increased significantly, and the maximum density of paddy field was higher than that of dry land. Strengthening the optimal allocation of soil and water resources and increasing the effective cultivated land area through land regulation is the only way for the future development of the northeast Sanjiang Plain.
【作者单位】： 东北农业大学资源与环境学院;
【基金】：国家自然科学基金项目(41571167) 黑龙江省自然科学基金项目(D201401)资助
【分类号】：F323.211
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本文编号：1683660