| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1371/journal.pone.0129487 |
| Closing yield gaps: how sustainable can we be? | |
| Pradhan P; Fischer G; van Velthuizen H; Reusser DE; Kropp JP | |
| 发表日期 | 2015 |
| 出处 | PLoS ONE 10 (6): e0129487 |
| 出版年 | 2015 |
| 语种 | 英语 |
| 摘要 | Global food production needs to be increased by 60-110% between 2005 and 2050 to meet growing food and feed demand. Intensification and/or expansion of agriculture are the two main options available to meet the growing crop demands. Land conversion to expand cultivated land increases GHG emissions and impacts biodiversity and ecosystem services. Closing yield gaps to attain potential yields may be a viable option to increase the global crop production. Traditional methods of agricultural intensification often have negative externalities. Therefore, there is a need to explore location-specific methods of sustainable agricultural intensification. We identified regions where the achievement of potential crop calorie production on currently cultivated land will meet the present and future food demand based on scenario analyses considering population growth and changes in dietary habits. By closing yield gaps in the current irrigated and rain-fed cultivated land, about 24% and 80% more crop calories can respectively be produced compared to 2000. Most countries will reach food self-sufficiency or improve their current food self-sufficiency levels if potential crop production levels are achieved. As a novel approach, we defined specific input and agricultural management strategies required to achieve the potential production by overcoming biophysical and socioeconomic constraints causing yield gaps. The management strategies include: fertilizers, pesticides, advanced soil management, land improvement, management strategies coping with weather induced yield variability, and improving market accessibility. Finally, we estimated the required fertilizers (N, P2O5, and K2O) to attain the potential yields. Globally, N-fertilizer application needs to increase by 45-73%, P2O5-fertilizer by 22-46%, and K2O-fertilizer by 2-3 times compared to the year 2010 to attain potential crop production. The sustainability of such agricultural intensification largely depends on the way management strategies for closing yield gaps are chosen and implemented. |
| 主题 | Water (WAT) |
| URL | http://pure.iiasa.ac.at/id/eprint/11407/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130180 |
| 推荐引用方式 GB/T 7714 | Pradhan P,Fischer G,van Velthuizen H,et al. Closing yield gaps: how sustainable can we be?. 2015. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Closing%20yield%20ga（2520KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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