| Study on water requirements of major crops in Beijing-Tianjin-Hebei region using DSSAT model |
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| DOI：10.7606/j.issn.1000-7601.2019.05.34 |
| Key Words: water requirement winter wheat summer maize DSSAT model Beijing-Tianjin-Hebei region |
| Author Name | Affiliation | | LANG Ting-ting | College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, China | | HAO Meng-meng | Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | WU Feng-hua | College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, China | | YAN Xiao-xi | Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | FU Jing-ying | Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| Beijing-Tianjin-Hebei is located in the Haihe River Basin, where faces severe water shortages and ecological imbalance, especially the agricultural water supply. Therefore, research on crop water requirements is of great significance to achieve inter-regional coordinated development and effective utilization of water resources. Taking Beijing-Tianjin-Hebei region as the research area, by combining GIS (Geographic Information System) technology with DSSAT model (Decision Support for Agrotechnology Transfer), the spatial distribution of water requirements of winter wheat and summer maize during 2016 to 2017 was modeled, and the effects of rainfall conditions and irrigation conditions on biomass was evaluated. The results showed that, The water requirement of winter wheat in Beijing-Tianjin-Hebei region ranged from 323.72 to 419.58 mm, and that of summer maize from 333.47 to 438.51 mm; the southeast and north of the planting area needed more water while the west needed less. The requirements for water increased significantly from day 160 after sowing of winter wheat but since sowing of summer maize. Around day 30 after sowing, the aboveground biomass of summer maize increased significantly. So, appropriate irrigation should be carried out before and after the date in order to reduce the waste of water resources. |
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