| Effects of drought on winter wheat yield in north China during 2012?C2100 |
| |
| 引用本文： | ??????,?????.Effects of drought on winter wheat yield in north China during 2012?C2100[J].Acta Meteorologica Sinica,2012,26(4):516-528. |
| |
| 作者姓名： | ?????? ????? |
| |
| 作者单位： | National Climate Center,China Meteorological Administration;Chinese Academy of Meteorological Sciences, China Meteorological Administration |
| |
| 基金项目： | Supported by the National Basic Research and Development (973) Program of China(2012CB955301);China Meteorological Administration Special Public Welfare Research Fund(GYHY201106021 and GYHY200806008) |
| |
| 摘 要： | Winter wheat is one of China’s most important staple food crops, and its production is strongly influenced by weather, especially droughts. As a result, the impact of drought on the production of winter wheat is associated with the food security of China. Simulations of future climate for scenarios A2 and A1B provided by GFDL-CM2, MPI_ECHAM5, MRI_CGCM2, NCAR_CCSM3, and UKMO_HADCM3 during 2001-2100 are used to project the influence of drought on winter wheat yields in North China. Winter wheat yields are simulated using the crop model WOFOST (WOrld FOod STudies). Future changes in temperature and precipitation are analyzed. Temperature is projected to increase by 3.9-5.5 for scenario A2 and by 2.9-5.1 for scenario A1B, with fairly large interannual variability. Mean precipitation during the growing season is projected to increase by 16.7 and 8.6 mm (10 yr)-1 , with spring precipitation increasing by 9.3 and 4.8 mm (10 yr)-1 from 2012-2100 for scenarios A2 and A1B, respectively. For the next 10-30 years (2012-2040), neither the growing season precipitation nor the spring precipitation over North China is projected to increase by either scenario. Assuming constant winter wheat varieties and agricultural practices, the influence of drought induced by short rain on winter wheat yields in North China is simulated using the WOFOST crop model. The drought index is projected to decrease by 9.7% according to scenario A2 and by 10.3% according to scenario A1B during 2012-2100. This indicates that the drought influence on winter wheat yields may be relieved over that period by projected increases in rain and temperature as well as changes in the growth stage of winter wheat. However, drought may be more severe in the near future, as indicated by the results for the next 10-30 years.
|
| 关 键 词： | drought climate change winter wheat North China |
| 本文献已被 CNKI SpringerLink 等数据库收录！ |
|
