Patterns and causes of winter wheat and summer maize rotation area change over the North China Plain
文献类型：期刊论文
| 作者 | Liu,Zhengjia1,4; Liu,Yansui1,4; Dong,Jinwei1,4; Baig,Muhammad Hasan Ali2; Chi,Wenfeng5; Peng,Liuying3; Wang,Jieyong1,4 |
| 刊名 | Environmental Research Letters
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 17期号:4 |
| 关键词 | crop phenology MODIS NDVI anomaly ensemble learning cropping frequency North China plain |
| DOI | 10.1088/1748-9326/ac6006 |
| 通讯作者 | Liu,Zhengjia() ; Wang,Jieyong() |
| 英文摘要 | Abstract Cropland area and cropping frequency play very crucial roles in determining regional food production. However, rapid urbanization accompanied by declining surplus-agricultural labor force has greatly altered patterns of agriculture land use and cropping frequency. Due to lack of continuous cropland and cropland-use intensity maps, our knowledge is still limited to understand whether the urbanization process must have a negative effect for changes in cropland-use intensity. Herein, we took the North China Plain (NCP), both the largest winter wheat and summer maize rotation area and rapidly urbanized area in China, as the study area, and used 250 m moderate resolution imaging spectroradiometer NDVI anomaly data, the correlation of NDVI time series in two neighboring years and machine learning algorithms to investigate spatiotemporal patterns and trends of cropland area and cropping frequency change over the NCP from 2000 to 2019. Results showed a significantly decreased cropland area observed since 2004 (slope = 783.8 km2 a?1, p < 0.01), while area of double-season cropping presented a relatively steady trend (slope = 446.9 km2 a?1, p = 0.335). As expected, decreased croplands were mainly occupied by urban and built-up land expansion, however, existing cropland-use intensity was yet improved. Patterns and trends of double-season cropping types were varied spatially. Particularly, the area of winter wheat and summer maize rotation presented a significantly increasing trend (slope = 3423.3 km2 a?1, p < 0.01). Furthermore, the respective area of winter wheat and summer maize both displayed significantly increasing trends with slope of 2953.8 and 2874.9 km2 a ?1(p < 0.01) in entire period. Land-use and grain subsidy policies are considered as largely responsible for this phenomenon. These satellite-observed findings highlight that positive land-use policies and managements will be helpful for profitably keeping/improving the harvest area. |
| 语种 | 英语 |
| WOS记录号 | IOP:ERL_17_4_044056 |
| 出版者 | IOP Publishing |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/166812]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu,Zhengjia; Wang,Jieyong |
| 作者单位 | 1.College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 2.Institute of Geo-Information and Earth Observation (IGEO), Arid Agriculture University, Rawalpindi 46300, Pakistan 3.School of Economics, Shandong University of Finance and Economics, Shandong, Jinan 250014, People’s Republic of China 4.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 5.College of Resources and Environmental Economics, Inner Mongolia University of Finance and Economics, Inner Mongolia, Hohhot 010070, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Liu,Zhengjia,Liu,Yansui,Dong,Jinwei,et al. Patterns and causes of winter wheat and summer maize rotation area change over the North China Plain[J]. Environmental Research Letters,2022,17(4). |
| APA | Liu,Zhengjia.,Liu,Yansui.,Dong,Jinwei.,Baig,Muhammad Hasan Ali.,Chi,Wenfeng.,...&Wang,Jieyong.(2022).Patterns and causes of winter wheat and summer maize rotation area change over the North China Plain.Environmental Research Letters,17(4). |
| MLA | Liu,Zhengjia,et al."Patterns and causes of winter wheat and summer maize rotation area change over the North China Plain".Environmental Research Letters 17.4(2022). |
入库方式： OAI收割
来源：地理科学与资源研究所
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