Paddy rice multiple cropping index changes in Southern China: Impacts on national grain production capacity and policy implications
文献类型：期刊论文
| 作者 | Jiang Min1,2; Li Xiubin1,2; Xin Liangjie1; Tan Minghong1,2 |
| 刊名 | JOURNAL OF GEOGRAPHICAL SCIENCES
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 29期号:11页码:1773-1787 |
| 关键词 | rice multiple cropping index food security double-cropping rice to single-cropping rice policy implications Southern China |
| ISSN号 | 1009-637X |
| DOI | 10.1007/s11442-019-1689-8 |
| 通讯作者 | Tan Minghong(tanmh@igsnrr.ac.cn) |
| 英文摘要 | Changes in rice production in Southern China are crucial to national food security. This study employed Landsat images to map the distributions of paddy rice-cropping systems in Southern China in 1990 and 2015. The impact of rice multiple cropping index changes on grain production capacity was then evaluated. Three important results were obtained for the 1990 to 2015 study period. First, the multiple cropping index for rice decreased from 148.3% to 129.3%, and 253.16x10(4) ha of land area was converted from double-cropping to single-cropping rice, termed "double to single". The area with the most dramatic changes is in the Middle-Lower Yangtze Plain. The rice-cropping system distribution in Southern China showed a change from north to south with double-cropping rice shrinking and single-cropping rice expanding. Second, the "double to single" conversion led to a reduction of 6.1% and 2.6% in rice and grain production, respectively. Hunan and Jiangxi Provinces, located in the main rice producing areas, and Zhejiang, which has shown better economic development, exhibited large reductions in rice production due to the "double to single" conversion, all exceeding 13%. Third, the grain production capacity of converted "double to single" paddy fields is equivalent to that of 223.3 x 10(4) ha of newly reclaimed cultivated land, which is 54% of the total newly cultivated land reclaimed through the 2001-2015 land consolidation project. It is also 1.7 times the target goal for newly cultivated land in the national land consolidation plan for 2016-2020. Making full use of the converted "double to single" paddy fields can save 167.44 billion yuan in newly reclaimed cultivated land costs. Therefore, instead of pursuing low-quality new arable land, it is better to make full use of the existing high-quality arable land. Based on these results, the government should change the assessment method for cultivated land balance, and incorporate the sown area increased by improving the multiple cropping index into the cultivated land compensation indicator. |
| WOS关键词 | LAND-USE CHANGES ; AREA ; PATTERNS ; REGION |
| 资助项目 | National Natural Science Foundation of China[41571095] ; National Natural Science Foundation of China[41161140352] |
| WOS研究方向 | Physical Geography |
| 语种 | 英语 |
| WOS记录号 | WOS:000505517300001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131100]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Tan Minghong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang Min,Li Xiubin,Xin Liangjie,et al. Paddy rice multiple cropping index changes in Southern China: Impacts on national grain production capacity and policy implications[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2019,29(11):1773-1787. |
| APA | Jiang Min,Li Xiubin,Xin Liangjie,&Tan Minghong.(2019).Paddy rice multiple cropping index changes in Southern China: Impacts on national grain production capacity and policy implications.JOURNAL OF GEOGRAPHICAL SCIENCES,29(11),1773-1787. |
| MLA | Jiang Min,et al."Paddy rice multiple cropping index changes in Southern China: Impacts on national grain production capacity and policy implications".JOURNAL OF GEOGRAPHICAL SCIENCES 29.11(2019):1773-1787. |
入库方式： OAI收割
来源：地理科学与资源研究所
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