Jiang Qunou1; Deng Xiangzheng1; Zhan Jinyan2; He Shujin1
Source Publicationchinesegeographicalscience
AbstractFood safety and its related influencing factors in China are the hot research topics currently, and cultivated land conversion is one of the significant factors influencing food safety in China. Taking the North China Plain as the study area, this paper examines the changes of cultivated land area using satellite images, estimates land productivity from 1985 to 2005 using the model of Estimation System for Land Productivity (ESLP), and analyzes the impact of cultivated land conversion on the land production. Compared with the grain yield data from statistical yearbooks, the results indicate that ESLP model is an effective tool for estimating land productivity. Land productivity in the North China Plain showed a slight decreasing trend from 1985 to 2005, spatially, increased from the north to the south gradu- ally, and the net changes varied in different areas. Cultivated land area recorded a marginal decrease of 8.0 x l0s ha, mainly converted to other land uses. Cultivated land conversion had more significant negative impacts on land produc- tion than land productivity did. Land production decreased by about 6.48 x 106 t caused by cultivated land conversion between 1985 and 2005, accounting for 91.9% of the total land production reduction. Although the land productivity increased in Anhui and Jiangsu provinces, it can not offset the overall adverse effects caused by cultivated land con- version. Therefore, there are significant meanings to control the cultivated land conversion and improve the land pro- ductivity for ensuring the land production in the North China Plain.
Document Type期刊论文
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Jiang Qunou,Deng Xiangzheng,Zhan Jinyan,et al. estimationoflandproductionanditsresponsetocultivatedlandconversioninnorthchinaplain[J]. chinesegeographicalscience,2011,021(006):685.
APA Jiang Qunou,Deng Xiangzheng,Zhan Jinyan,&He Shujin.(2011).estimationoflandproductionanditsresponsetocultivatedlandconversioninnorthchinaplain.chinesegeographicalscience,021(006),685.
MLA Jiang Qunou,et al."estimationoflandproductionanditsresponsetocultivatedlandconversioninnorthchinaplain".chinesegeographicalscience 021.006(2011):685.
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