| 郎婷婷,郝蒙蒙,吴风华,阎晓曦,付晶莹.基于DSSAT模型的京津冀地区主要农作物用水分析[J].干旱地区农业研究,2019,37(5):235~242 |
| 基于DSSAT模型的京津冀地区主要农作物用水分析 |
| 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 |
| 中文关键词: 需水规律；冬小麦；夏玉米；DSSAT模型 京津冀地区 |
| 英文关键词:water requirement winter wheat summer maize DSSAT model Beijing-Tianjin-Hebei region |
| 基金项目:国家重点研发计划(2016YFC0503507)；西藏重大科技专项(Z2016C01G01) |
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| 中文摘要: |
| 以京津冀为研究区，将GIS（Geographic Information System）技术与DSSAT（Decision Support for Agrotechnology Transfer）模型相结合，对2016—2017年冬小麦和夏玉米的生长需水情况进行模拟，并分析了雨养条件及灌溉条件对冬小麦和夏玉米生物量的影响。结果表明：京津冀地区冬小麦的需水量在323.72~419.58 mm之间，夏玉米的需水量在333.47~438.51 mm之间；2种作物需水量较多的地区主要集中在种植区的东南部及北部，需水量相对较少的地区主要分布在种植区的西部。冬小麦从播种开始的第160天左右，耗水量显著增加，夏玉米对水分需求一直增加，30 d前后，夏玉米地上生物量显著增加，因此，在冬小麦播种的前160 d、夏玉米播种的前30 d内应适度灌溉，避免过度灌溉造成水资源浪费。 |
| 英文摘要: |
| 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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