| 中东部地区土地利用与土地退化特征分析 |
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| 引用本文： | 韩永伟,高吉喜,乔 青.中东部地区土地利用与土地退化特征分析[J].环境科学研究,2005,18(6):94-98. |
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| 作者姓名： | 韩永伟 高吉喜 乔 青 |
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| 作者单位： | 1. 中国环境科学研究院,生态所,北京,100012
2. 中国环境科学研究院,生态所,北京,100012;北京林业大学,水土保持学院,北京,100083 |
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| 基金项目： | 国家环境保护总局重大项目 |
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| 摘 要： | 采用20世纪80年代,90年代和2000年的遥感、地面调查及文献资料数据,分析了我国中东部地区土地利用与土地退化特征。分析结果认为,耕地和林地是中东部地区主要的土地利用类型,占该区土地总面积的68%左右;园地、居民和工矿及交通用地面积迅速增加;未利用土地面积明显缩小;水土流失得到初步控制,流失面积有所减少,但水土流失区域差异大,部分地区水土流失仍在加剧;耕地人均占有量小,利用强度大,复种指数高;耕地用途不稳,转入转出频繁;耕地总面积与人均耕地面积迅速减少,2000年耕地面积比80年代初和1995年分别减少了913.15×104和151.31×104hm2;2000年人均占有耕地面积比80年代初期约减少了0.03 hm2;土壤污染严重,耕地质量不断下降,食品安全受到威胁。
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| 关 键 词： | 土地利用 土地退化 特征 中东部 |
| 文章编号： | 1001-6929（2005）06-0094-05 |
| 收稿时间： | 2005-06-09 |
| 修稿时间： | 2005-06-09 |
Analysis of the Characteristic of Land Use and Land Degradation in Mid-Eastern China |
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| HAN Yong-wei,GAO Ji-xi and QIAO Qing.Analysis of the Characteristic of Land Use and Land Degradation in Mid-Eastern China[J].Research of Environmental Sciences,2005,18(6):94-98. |
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| Authors: | HAN Yong-wei GAO Ji-xi and QIAO Qing |
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| Affiliation: | HAN Yong-wei~1,GAO Ji-xi~1,QIAO Qing~ |
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| Abstract: | Using the data of remote sensing,references and field investigation in 1980's,1990's and 2000,the characteristic of land use and land degradation in mid-eastern China was analyzed.The results show: farmland and woodland are the main land use types,which occupy sixty-eight percent of the total area of mid-eastern China;the area of garden plot,inhabitant land and traffic land is increasing quickly;the area of none-used land is reducing obviously;soil and water erosion has been controlled primarily with decreasing area of soil and water erosion,but the difference between regions is huge,soil and water erosion still becomes more and more serious in some places;the farmland area per capita is small,the utilization intensity great and the multiple-cropping index high;the use of farmland is changing frequently,a lot of woodland and grassland are reclaimed while lots of farmland occupied;the area of farmland in 2000 is reduced by 9.131 5 million and 1.513 1 million hectare compared to the beginning of 1980's and 1995,respectively;the area of farmland per capita decreases by 0.03 hectare from the beginning of 1980's to 2000;the soil pollution is more and more serious,the quality of farmland is dropping constantly,and the food safety is intimidated. |
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| Keywords: | land use land degradation characteristic mid-eastern China |
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