| Cite this article: | 任频频,李保国,黄 峰.权衡生产和耗水的区域小麦种植格局优化[J].灌溉排水学报,0,():-. |
| Ren Pinpin,LI Baoguo,HUANG Feng.权衡生产和耗水的区域小麦种植格局优化[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Optimization of regional wheat planting pattern with trade-off between production and water consumption |
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Ren Pinpin, LI Baoguo, HUANG Feng
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College of Land Science and Technology, China Agricultural University
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| Abstract: |
| 【Objective】Wheat is planted widely and irrigated intensively in the north China region, and optimizing the planting area of wheat has great potential to save irrigation and alleviate the pressure of water shortage in this area.【Method】By introducing the indicators of evapotranspiration and yield of wheat, the objective planning model of wheat planting area at county level was established at the regional scale in the north China region, and the optimization scheme of regional wheat production layout was discussed from the perspective of the trade-off between production and water consumption.【Result】Spatiotemporal characteristics of evapotranspiration during wheat season was first analyzed. From 2001 to 2009, evapotranspiration during wheat season in the north China region showed an increasing trend, and then a significant decreasing trend from 2010 to 2018 (p<0.05). Furthermore, evapotranspiration during wheat season showed significant differences among different hydrological years (p<0.05), which showed the characteristics of “the highest in dry year, the second in normal year, and the lowest in wet year”. The results of the objective optimization model showed that: at the provincial level, when the weight of production was 1, the wheat yield can be increased by 1.2%~2.3% under the existing irrigation level, and the evapotranspiration of wheat can be reduced by 0.4%~0.8% when the weight of evapotranspiration was 1. And the corresponding results at the municipal level were 0.7%~1.6% and 0.3%~0.5%, respectively. In addition, under the same irrigation level, in the process of decreasing the weight of production and increasing the weight of evapotranspiration, the regions that could maintain a high wheat planting scale shifted regularly (from south to north in Hebei), reflecting the advantages of different counties in wheat production or water consumption management.【Conclusion】No matter at the current irrigation level or under certain irrigation constraints, more yield or less evapotranspiration can be achieved by optimizing the county-scale wheat planting area in the north China region. This study can provide a certain reference for the optimization of regional wheat planting pattern and water resources management in this region. |
| Key words: wheat planting, regional optimization, trade-off between production and water consumption, irrigation constraint |
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