Uncertainty of wheat water use: Simulated patterns and sensitivity to temperature and CO2
文献类型：SCI/SSCI论文
| 作者 | Cammarano D.; Rotter, R. P.; Asseng, S.; Ewert, F.; Wallach, D.; Martre, P.; Hatfield, J. L.; Jones, J. W.; Rosenzweig, C.; Ruane, A. C. |
| 发表日期 | 2016 |
| 关键词 | Multi-model simulation Transpiration efficiency Water use Uncertainty Sensitivity climate-change use efficiency crop yield potential evapotranspiration atmospheric co2 food security elevated co2 impacts productivity models |
| 英文摘要 | Projected global warming and population growth will reduce future water availability for agriculture. Thus, it is essential to increase the efficiency in using water to ensure crop productivity. Quantifying crop water use (WU; i.e. actual evapotranspiration) is a critical step towards this goal. Here, sixteen wheat simulation models were used to quantify sources of model uncertainty and to estimate the relative changes and variability between models for simulated WU, water use efficiency (WUE, WU per unit of grain dry mass produced), transpiration efficiency (T-eff, transpiration per kg of unit of grain yield dry mass produced), grain yield, crop transpiration and soil evaporation at increased temperatures and elevated atmospheric carbon dioxide concentrations ([CO2]). The greatest uncertainty in simulating water use, potential evapotranspiration, crop transpiration and soil evaporation was due to differences in how crop transpiration was modelled and accounted for 50% of the total variability among models. The simulation results for the sensitivity to temperature indicated that crop WU will decline with increasing temperature due to reduced growing seasons. The uncertainties in simulated crop WU, and in particularly due to uncertainties in simulating crop transpiration, were greater under conditions of increased temperatures and with high temperatures in combination with elevated atmospheric [CO2] concentrations. Hence the simulation of crop WU, and in particularly crop transpiration under higher temperature, needs to be improved and evaluated with field measurements before models can be used to simulate climate change impacts on future crop water demand. (C) 2016 Elsevier B.V. All rights reserved. |
| 出处 | Field Crops Research |
| 卷 | 198 |
| 页 | 80-92 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0378-4290 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43386]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Cammarano D.,Rotter, R. P.,Asseng, S.,et al. Uncertainty of wheat water use: Simulated patterns and sensitivity to temperature and CO2. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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