LIU Yun-wei.Spatiotemporal Characteristics of Cultivated Land and Grain Output in the Typical Mountain Areas—A Case Study of Liangshan Prefecture, Sichuan Province[J].Research of Soil and Water Conservation,2014,21(05):198-203.
典型山区耕地面积与粮食产量时空格局分析——以四川省凉山州为例
- Title:
- Spatiotemporal Characteristics of Cultivated Land and Grain Output in the Typical Mountain Areas—A Case Study of Liangshan Prefecture, Sichuan Province
- Keywords:
- Liangshan prefecture; cultivated land area; grain output; minimum cultivated land area per capita; cultivated land pressure index; spatiotemporal characteristics
- 分类号:
- F323.211;F326.11
- 摘要:
- 以西南山区的四川省凉山州为例，运用描述性统计分析、耕地压力指数、聚类分析等方法，分析了耕地面积和粮食产量时间变化特点和空间差异特征。结果表明：（1）1999—2011年，凉山州耕地总面积和粮食总产量总体上呈上升趋势，人均耕地面积呈减少的趋势；人均粮食产量、单位耕地面积粮食产量呈波动上升趋势；耕地压力指数始终小于1，凉山州总体上无耕地压力。（2）凉山州耕地面积、粮食产量、最小人均耕地面积和耕地压力指数空间差异明显，有8个县的耕地压力较大，7个县基本无耕地压力，2个县无耕地压力。最后，对山区耕地保护和实现粮食安全的对策进行了简单探讨。
- Abstract:
- The typical mountain area in southwest China named Liangshan Yi Autonomous Prefecture of Sichuan Province was taken as an example. This paper analyzed the temporal changes and spatial distribution characteristics of cultivated land area(CLA) and grain output(GO) by employing the method of descriptive statistics, cultivated land pressure index(CLPI), cluster analysis, etc. The results showed that :(1) from 1999 to 2011, the total cultivated area and total grain output had a process of increase, and the cultivated land area per capita presented a decreased trend, the grain output per capita and the grain output per unit appeared to be a fluctuating upward trend, during the period 1999 to 2011, the CLPI was always less than 1, so there was no arable land pressure in Liangshan prefecture; (2) the CLA, GO, minimum cultivated land area per capita and CLPI had significant spatial difference, 8 counties had cultivated land pressure, 7 counties basically had no cultivated land pressure, and 2 counties had no cultivated land pressure. Lastly, this paper simply discussed the related policies and measures on protecting cultivated land and achieving food security in the mountain areas.
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备注/Memo
收稿日期:2013-11-24;改回日期:2013-12-13。
基金项目:中国科学院知识创新工程重要方向项目“西南典型山区资源环境安全的产业承载规模研究（KZCX2-YW-333-2）”；教育部人文社会科学青年基金项目“基于生计策略的贫困山区农户可持续生计研究——以凉山州为例”（13YJCZH050）
作者简介:刘运伟(1982-),男,江西赣县人,博士生,讲师,主要研究方向为山区可持续发展。E-mail:yunweiliu@sina.com