SHI Kai-fang,DIAO Cheng-tai.Development of Grain Production and Spatial Pattern of Land Carrying Capacity in Chongqing City[J].Research of Soil and Water Conservation,2012,19(04):168-171.
重庆市粮食生产发展特征及土地资源承载力空间格局研究
- Title:
- Development of Grain Production and Spatial Pattern of Land Carrying Capacity in Chongqing City
- Keywords:
- grain; land carrying capacity; land carrying capacity index; spatial pattern; Chongqing City
- 分类号:
- F326.11
- 摘要:
- 首先分析了1985—2010年重庆市粮食生产发展过程的特点，随后以人粮关系为基础，构建了土地资源承载力（LCC）模型和土地资源承载指数（LCCI）模型，从区县尺度对重庆市土地资源承载力空间格局现状进行了分析。结果表明：1985—2010年重庆市粮食生产呈周期性波动特征，具有明显的不稳定性；人均粮食占有量起伏较小，基本维持在356.5 kg/人左右，人口增幅略小于粮食产量增幅。2009年重庆市区县土地资源承载力主要以人口超载、粮食短缺为主要特征。都市发达经济圈的8个区县以及渝东北翼的大部分区县表现为粮食亏缺、人口超载，渝东南翼的大部分区县以及渝西的大部分区县表现为人粮均衡，只有合川区、南川区、黔江区、石柱县和秀山县5个区县处于粮食盈余状态。因此必须加强重庆各区县以及重庆市与其他省市之间的粮食贸易和调配来满足人口超载区的粮食需求。
- Abstract:
- With the growth of population, land carrying capacity and food safety have attracted great attention worldwide. In this study, the characteristics of development of grain production in Chongqing City were analyzed and summarized firstly, and then, land carrying capacity (LCC) and land carrying capacity index (LCCI) models were developed from the point of man-grain relationship. Finally, the LCCI was calculated for each county of Chongqing in 2009, and the current situation of land carrying capacity and its spatial pattern were systematically evaluated. The results showed that: from 1985 to 2010, the grain production of Chongqing City presented an upward tendency and the population growth rate was less than that of grain yield, and the grain yield per capita kept stable; food deficits and population overloading remained the primary characteristics of LCC of Chongqing City at a county scale in 2009. The 8 counties of Metropolitan Developed Circle and the counties of Northeast of Chongqing City had a man-grain conflict and appeared to be population overloading, and the grain balance counties located in the southeast of Chongqing and west of Chongqing City, and the 5 counties kept grain surplus. Therefore, for counties with a deficit in grain production, large amount of grain should be traded and transported from other counties in order to meet people’s demands.
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备注/Memo
收稿日期:2011-2-13;修回日期:2012-4-11
基金项目:国家科技支撑计划重点项目（2OO6BAJ14B04）；中央高校基本科研业务费专项资金资助（XDJK2011C025）
作者简介:施开放（1986- ），男，安徽巢湖人，硕士生，主要研究方向为城市地貌与城市发展、土地利用规划。E-mail：shikf1986@126.com。
通讯作者:刁承泰（1949- ），男，四川成都人，教授，博士生导师，主要研究方向为城市地貌与城市发展、资源科学、土地科学。E-mail：diaoct@swu.edu.cn。