基于地块尺度的重庆山区耕地撂荒风险研究

发布时间：2018-04-08 09:26

本文选题：地块尺度　切入点：山区　出处：《山地学报》2017年04期

【摘要】：城乡劳动力转移背景下耕地撂荒风险的研究是土地利用覆被变化的重要组成部分,辨明耕地撂荒的风险与发展趋势是预测耕地未来发展的重要依据。本文选择重庆市石柱、巫山和酉阳3县作为研究区,基于地块尺度对山区耕地撂荒现象的特点与影响因素的调查分析,确定经验模型,评估现有耕地(尚未撂荒的)未来撂荒的风险大小。结果表明,2011年重庆市3县耕地地块为21.71万个,处于低、中、高三级撂荒风险水平的耕地面积依次为6.3万hm~2、13.2万hm~2和5.8万hm~2,比例分别为25%、52%和23%。通过对比村级尺度撂荒风险耕地分布图、高程图与坡度图发现,高撂荒风险的耕地主要集中分布在海拔高且坡度陡的地区。
[Abstract]:The study on the risk of cultivated land abandonment under the background of urban and rural labor force transfer is an important part of land use and cover change. The identification of the risk and development trend of cultivated land abandonment is an important basis for predicting the future development of cultivated land.In this paper, Shizhu, Wushan and Youyang counties in Chongqing are selected as study areas. Based on the investigation and analysis of the characteristics and influencing factors of cultivated land abandonment in mountainous areas on the scale of plots, the empirical model is established.Assess the risk of future abandonment of existing arable land (not yet abandoned).The results showed that in 2011, the cultivated land area of 3 counties in Chongqing was 21.71 thousand, which was low. The cultivated land area of middle and third grade abandoned land was 2, 132000 hm~2 and 58000 hmm-2, respectively, and the proportion was 25% and 23%, respectively.By comparing the distribution map of abandoned arable land at village scale, elevation map and slope map, it was found that the cultivated land with high abandoned risk was mainly distributed in areas with high elevation and steep slope.
【作者单位】：河北地质大学土地资源与城乡规划学院;中国科学院地理科学与资源研究所陆地表层格局与模拟院重点实验室;
【基金】：国家自然科学基金重大国际合作项目(41161140352);国家自然科学基金面上项目(41571095);国家自然科学基金青年基金项目(41501192;41401193) 河北地质大学博士科研启动基金项目(BQ201603)~~
【分类号】：F323.211

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