作　　者： ; ; ; ;

机构地区： 中国科学院地理科学与资源研究所

出　　处： 《自然资源学报》 2013年第1期126-136,共11页

摘　　要： 研究占补耕地光温生产潜力的时空特征对指导耕地资源开发与粮食生产具有重要意义。论文基于1980年代末—2010年的多期土地利用和多年平均光温生产潜力,以占用耕地与增补耕地单位面积光温生产潜力为依据,分析20 a来中国占补耕地光温生产潜力时空特征,并进一步探讨其对光温生产潜力总量的影响。结果表明:①1980年代末—2010年,全国耕地存在明显的占优补劣情况;②从各分区看,东北平原主产区、北方干旱半干旱主产区、青藏高原区、华南主产区、云贵高原区占用耕地单位面积光温生产潜力持续高于增补耕地,长江中下游主产区占用耕地单位面积光温生产潜力持续低于增补耕地,四川盆地及周边地区、黄土高原区、海南由占优补劣变为占劣补优,黄淮海平原区由占劣补优变为占优补劣;③占优补劣对全国光温生产潜力总量变化有显著影响;④东北平原主产区等我国耕地开垦的主要区域受占优补劣的影响较大,华南主产区等耕地损失区受占优补劣的影响相对较小,占劣补优对缩小耕地占用对光温生产潜力总量影响的作用并不大。 It is of great significance to study the light-temperature potential productivity （ LT- PP） on cropland occupation and supplement for reasonable developing cropland resources and instructing grain production. This paper analyzed spatial-temporal characteristics of LTPP on cropland occupation and supplement for recent 20 years in terms of LTPP per unit area based on multiperiod land use change data and average annual LTPP from 1990 to 2010. The resuits demonstrate ： 1 ） LTPP per unit area on cropland occupation was higher than on cropland supplement at country level from the 1980s to 2010. 2）At regional level, LTPP per unit area on cropland occupation was continuously higher than on supplement in the last 20 years in producing areas of Northeast China Plain, arid and semiarid northern China, Qinghai Tibetan Plateau, South China and Yunnan - Guizhou Plateau. Cropland with lower LTPP per unit area was occupied and cropland with higher LTPP per unit area was supplemented in the middle and lower reaches of the Yangtze River. LTPP per unit area on occupation was higher for the former 10 years but however, lower for the latter 10 years in Sichuan Basin and the surround- ing area, the Loess Plateau, and Hainan. The cropland with higher LTPP per unit area was supplemented for the former 10 years and occupied for the latter 10 years in Huang-Huai-Hai Plain. 3）Better cropland occupied and worse cropland supplemented had an important effect on total LTPP at country level. 4） The regions （ Northeast China Plain, etc. ） , with a greater deal of cropland supplement than occupation were remarkably affected by better cropland occupied and worse cropland supplemented, which had a slight effect on the regions （ South China and so on） with a greater deal of cropland occupation than supplement. Better cropland supplied than worse cropland occupied also slightly impacts the regions （the middle and lower reaches of the Yangtze River and so on） where more cropland was occupied and less cropland was supplemented

关 键 词： 耕地占用 耕地增补 光温生产潜力

领　　域： [经济管理]