Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China
文献类型：期刊论文
| 作者 | Li, Danfeng1; Wang, Xunming1,2 |
| 刊名 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 322页码:17 |
| 关键词 | Water saving irrigation Water exchange Water productivity Agricultural management Oasis-desert ecotone |
| ISSN号 | 0167-8809 |
| DOI | 10.1016/j.agee.2021.107647 |
| 通讯作者 | Li, Danfeng(lidf@igsnrr.ac.cn) |
| 英文摘要 | Water is the key factor limiting crop production in arid inland river basins of northwestern China, where water scarcity challenges food security and the sustainability of eco-environment. Changing the chronical management strategies is urgent to realize more crop per drop and to satisfy ecological water requirement in the Hexi Corridor, where agriculture relied heavily on irrigation using groundwater. Long-term observations of soil water balance components and crop production are lack but essential to optimize irrigation schedules with moderate groundwater recharge. AquaCrop model was calibrated and validated using field data on spring wheat and spring maize rotation in the midstream of the Heihe River from 2005 to 2014, and used to assess current irrigation practices and to generate optimal deficit irrigation schedules. Simulations of soil water balance, canopy progression, biomass accumulation and yield production over time well mimicked the water utilization and crop development. Plastic mulching prevented 53.5% and 62.6% of potential soil evaporation for spring wheat and spring maize, respectively. Temporary water logging soon after irrigation reduced transpiration by restricting canopy development and stomatal conductance. No more than 30% of water supply was used by crops, but drainage below mot zone occupied more than 68% of water supply by present. Mean biomass water use efficiency (WUE) was 0.034 kg m(-3) and 0.047 kg m(-3), and mean yield WUE was 1.16 kg m(-3) and 2.41 kg m(-3) for spring wheat and spring maize, respectively. Cultivar "2014" for spring wheat and cultivar "8703" for spring maize were suitable for yield production in this area. Beyond 50% of applied water would be productively used with reduction of drainage in water supply by more than 25% under the modified irrigation schedules. Total amount of applied water reduced by about 50%, but the biomass and yield values would remain unchanged. These irrigation schedules will greatly improve WUE of irrigated agriculture, supporting the rational allocation of water resources of the inland river basins at a watershed scale. |
| WOS关键词 | SIMULATE YIELD RESPONSE ; FAO AQUACROP MODEL ; GROUNDWATER RECHARGE ; CROP MODEL ; GAS-EXCHANGE ; SOIL ; MAIZE ; WHEAT ; STRATEGIES ; MANAGEMENT |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0305] ; National Natural Science Foundation of China[41701251] ; National Natural Science Foundation of China[41930640] |
| WOS研究方向 | Agriculture ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000707000600002 |
| 出版者 | ELSEVIER |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167103]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Danfeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Danfeng,Wang, Xunming. Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,322:17. |
| APA | Li, Danfeng,&Wang, Xunming.(2021).Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,322,17. |
| MLA | Li, Danfeng,et al."Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 322(2021):17. |
入库方式： OAI收割
来源：地理科学与资源研究所
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