城市化和退耕还林草对中国耕地生产力的影响
Impacts of Cropland Transformation on Agricultural Production under Urbanization and Grain for Green Project in China
查看参考文献36篇
|
文摘
|
20世纪90年代以来的快速城市化进程和1999年开始启动的退耕还林草生态工程对耕地的分布与生产能力产生了重要影响。本研究应用由TM遥感影像获取的1980s-2000年与2000-2005年两个时间段耕地变化数据,结合以多时相遥感数据为主要数据源的耕地生产力光能利用率遥感模型估算两个研究时段耕地生产力变化特征,比较城市化与退耕还林草政策主导下两个时期耕地转移对各区域耕地生产力的影响。研究结果表明:两个研究时段因城市占用损失的耕地生产力占土地利用变化(LUCC)导致的耕地生产力减少总量比例均在60%以上。在20世纪90年代,全国新增耕地生产力总量比被占用耕地生产力高87%,耕地转移使中国耕地生产力增加。2000-2005年间,退耕还林草政策的启动和快速城市化进程对耕地的持续占用导致耕地生产力占补正平衡指数由前一时段的正平衡变为负平衡,转出耕地生产力总量比新增耕地生产力高31%,耕地转为林草地和建设占用损失的耕地生产力分别较前一时段提高57%和85%。城市化与退耕还林草政策等驱动因素作用下耕地开垦区与占用区的空间分布差异使得耕地生产力占补平衡状态和趋势呈现明显的区域分异。 |
|
其他语种文摘
|
In this study,the changes of agricultural production from cropland transformation in the periods of the late 1980s-2000 and 2000-2005 were estimated based on:1)the cropland transformation results derived from Landsat TM imagery by artificial interpretation method,and 2)net primary productivity(NPP)data from the light use efficiency models of Global Production Efficiency Model(GloPEM)and Vegetation Photosynthesis Model(VPM). Changes of regional grain production capacity were mainly from two aspects of cropland transformation:cropland conversion(e.g.urbanization,converting cropland into forest)and land reclamation(e.g.converting grassland into cropland).The impacts of different cropland transformation types on agricultural production within the two periods were evaluated,a series of comparisons were conducted between the two periods as well as different regions. Results indicated that the agricultural production loss due to urban sprawl accounted for more than 60%during both stages(1980s-2000 and 2000-2005)in the total loss.In the first stage, generally,agricultural production increased evidently.The increased production from land reclamation was 87%higher than production decrease from cropland conversion.However,in the second stage(2000-2005)the agricultural production loss due to cropland conversion was 31%higher than the production increase from land reclamation,in other words,the production decrease due to cropland loss could not be compensated by limited land reclamation,as unban expansion and Grain for Green(GFG)project played an important role in cropland transformation since around 2000.Production losses from GFG project and urbanization were 57%and 85%higher than that in the previous stage,respectively.Due to GFG project,the states of agricultural production equilibrium changed from positive balance from the 1980s to 2000 into a negative balance during 2000-2005.the loss of agricultural production mainly occurred in Northeast China,Inner Mongolia,Yunnan and Zhejiang provinces from the 1980s to 2000,and then transferred to Inner Mongolia,Shaanxi,Gansu, Sichuan and Guizhou provinces from 2000 to 2005.The production loss due to urbanization mainly occurred in Jiangsu,Hebei,Anhui,Shandong,Henan and Guangdong provinces from the 1980s to 2000,then changed into provinces of Zhejiang,Guangdong,Shandong,Fujian and Jiangsu during 2000-2005.The land reclamation foci transferred from Northeast China to Northwest China in the two stages,the greatest contribution regions to agricultural production shifted from the Xinjiang Uygur Autonomous Region from the 1980s to 2000 into Heilongjiang Province during 2000-2005.Due to the cropland transformation from urbanization and GFG project,two thirds of provinces showed a significant change in agricultural production balance state in the two stages. |
|
来源
|
地理学报
,2012,67(5):579-588 【核心库】
|
|
关键词
|
土地利用变化
;
农田生产力
;
遥感
;
光能利用率模型
|
|
地址
|
中国科学院地理科学与资源研究所, 北京, 100101
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0375-5444 |
|
学科
|
社会科学总论 |
|
基金
|
国家973计划
;
国家自然科学基金
;
中国科学院知识创新工程重大项目
;
中国科学院战略性先导科技专项
|
|
文献收藏号
|
CSCD:4539357
|
参考文献 共
36
共2页
|
|
1.
Foley J A. Global consequences of land use.
Science,2005,309:570-574
|
CSCD被引
716
次
|
|
|
|
|
2.
刘巽浩. 粮食——中国农业的永恒难题与主题.
农业现代化研究,2010,31(4):385-391
|
CSCD被引
11
次
|
|
|
|
|
3.
Alexandratos N. World food and agriculture: Outlook for the medium and longer term.
Proceedings of the National Academy of Sciences of the United States of America,1999,96:5908-5914
|
CSCD被引
6
次
|
|
|
|
|
4.
张宪法. 我国粮食生产能力探析与政策思考.
农业现代化研究,2007,28(2):140-143
|
CSCD被引
3
次
|
|
|
|
|
5.
邹定斌. 我国粮食安全隐患与保障国家粮食安全对策.
农业现代化研究,2004,25(3):165-168
|
CSCD被引
1
次
|
|
|
|
|
6.
Wang Xiuhong. Implications for development of grain-for-green policy based on cropland suitability evaluation in desertification-affected north China.
Land Use Policy,2007(24):417-424
|
CSCD被引
1
次
|
|
|
|
|
7.
Brown M E. Food security under climate change.
Science,2008,319:580-581
|
CSCD被引
17
次
|
|
|
|
|
8.
Godfray H C J. Food security: The challenge of feeding 9 billion people.
Science,2010,327:812-818
|
CSCD被引
335
次
|
|
|
|
|
9.
Liu J. Spatial and temporal patterns of China's cropland during 1990-2000: An analysis based on Landsat TM data.
Remote Sensing of Environment,2005,98:442-456
|
CSCD被引
68
次
|
|
|
|
|
10.
Dong J. Spatio-temporal pattern and rationality of land reclamation and cropland abandonment in mid-eastern Inner Mongolia of China in 1990-2005.
Environmental Monitoring and Assessment,2010
|
CSCD被引
1
次
|
|
|
|
|
11.
李秀彬. 中国近20年来耕地面积的变化及其政策启示.
自然资源学报,1999,14(4):329-334
|
CSCD被引
241
次
|
|
|
|
|
12.
李茂. 中国耕地和粮食生产力变化的省际差异研究.
资源科学,2003,25(3):49-56
|
CSCD被引
25
次
|
|
|
|
|
13.
Yan H M. Assessing the consequence of land use change on agricultural productivity in China.
Global and Planetary Change,2009,67:13-19
|
CSCD被引
18
次
|
|
|
|
|
14.
陈阜. 未来城市化进程持续, 粮食安全底线面临考验.
光明日报,2010
|
CSCD被引
1
次
|
|
|
|
|
15.
石全红. 中国中低产田时空分布特征及增产潜力分析.
中国农学通报,2010,26(19):369-373
|
CSCD被引
26
次
|
|
|
|
|
16.
徐小黎. 我国土地政策对耕地可持续利用的影响.
北京师范大学学报: 社会科学版,2003,2:115-123
|
CSCD被引
1
次
|
|
|
|
|
17.
汪涌. 基于耕地面积订正的中国复种指数研究.
中国土地科学,2008,22(12):46-52
|
CSCD被引
17
次
|
|
|
|
|
18.
封志明. 耕地与粮食安全战略:藏粮于土,提高中国土地资源的综合生产能力.
地理学与国土研究,2000,16(3):1-5
|
CSCD被引
62
次
|
|
|
|
|
19.
张落成. 我国粮食生产布局变化特点及其成因分析.
长江流域资源与环境,2000,9(2):221-228
|
CSCD被引
20
次
|
|
|
|
|
20.
Yang H. Cultivated land and food supply in China.
Land Use Policy,2000,17(2):73-88
|
CSCD被引
93
次
|
|
|
|
|
了解气象卫星更多信息，请访问