【作者】 刘纪远； 徐新良； 庄大方； 高志强；

【Author】 Liu Jiyuan;Xu Xinliang;Zhuang Dafang;Gao Zhiqiang;Institute of Geographical Sciences and Nature Resources Research,CAS;

【机构】 中国科学院地理科学与资源研究所；

【摘要】 本文在20世纪90年代中国气候观测数据和遥感土地利用动态观测数据的支持下,计算了我国20世纪90年代农田光温生产潜力的变化。结果显示:20世纪90年代的LUCC过程直接导致了我国农田光温生产潜力总量和区域分布的变化,总体趋势是南减北增,总量净增加2622万t;耕地扩张和农田损失是导致全国农田光温生产潜力总量净变化的主要原因,耕地扩张使全国农田光温生产潜力总量净增加8335万t,占全国农田光温生产潜力总量的3.46%,主要分布在东北、西北和华北等农林、农牧交错区和沙漠绿洲区,主要是由于该地区大面积的农田开垦所导致;农田损失使全国农田光温生产潜力总量净减少5713万t,占全国农田光温生产潜力总量的2.37%,主要分布在黄淮海平原、长江三角洲、珠江三角洲、陇中、东南沿海、四川盆地东南部以及乌鲁木齐-石河子一带,主要是由于该区域经济发展较快,城市扩张明显,城乡建设用地大量侵占耕地的缘故。更多还原

【Abstract】 LUCC process would affect the fannland productivity by changing the quality of land resource and land-use structure.Based on meteorological data and land-use/cover observation dataset coming from the dynamic serving system of national resources and environment database(NRED),this article firsdy calculated the photosynthetic thermal productivity(PTP) of farmland,then analyzed the impact of recent LUCC process on it.The results showed that under the influence of LUCC process the fluctuation of PTP change in distribution had extensive and unbalanced characteristics.The LUCC process make total China’s PTP increased by26.22 million tons.The PTP increased obviously in the following regions:North-East Plain,Inner Mongolia,Xinjiang province,that was primarily driven by plantation reclamation.And the PTP decreased obviously in Huang-Huai-Hai Plain,Yangtse Rive delta,Zhujiang delta,South-East coastal provinces,south-east parts of Sichuan basin and Xinjiang oasis,that was mosdy driven by the extension of built-up and residential area.更多还原