| Interactive effects of CO2 and nitrogen application on water use efficiency of spring wheat in water\|limited environments |
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| DOI：10.7606/j.issn.1000-7601.2023.01.27 |
| Key Words: climate change water\|limited environments spring wheat water use efficiency CO2 concentration increasing nitrogen level |
| Author Name | Affiliation | | LI yu | School of Chemical Engineering, Northwest University for Nationalities, Provincial Key Laboratory of Environmentally Friendly Composite Materials and Biomass Utilization in Universities of Gansu Province, Lanzhou, Gansu 730030, China
Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of CMA, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020， China | | QI Yue | Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of CMA, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020 | | WANG Xiaoheng | School of Medical Sciences, Northwest University for Nationalities, Lanzhou, Gansu 730030, China | | ZHU Qingqing | School of Chemical Engineering, Northwest University for Nationalities, Provincial Key Laboratory of Environmentally Friendly Composite Materials and Biomass Utilization in Universities of Gansu Province, Lanzhou, Gansu 730030, China | | YUE Ping | Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of CMA, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020 | | ZHANG Qiang | Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of CMA, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020 |
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| Abstract: |
| A simulated change climatic manipulation was conducted to evaluate the effects of CO2 concentration and nitrogen level increase on water use efficiency in spring wheatat Dingxi Drought Meteorological and Ecological Environment Experimental Base of China Meteorological Administration in 2011. The objective of this study was to determine if increasing CO2 and nitrogen level would significantly change water use efficiency in spring wheat. The results revealed that the interactivity of increasing in CO2 concentration and nitrogen level led to a significant change in water use efficiency of yield in spring wheat. Compared to CK, the interaction influence of water use efficiency of spring wheat in a 90 μmol·mol-1 CO2 concentration and nitrogen application of 135 kg·hm-2 and 315 kg·hm-2 decreased by 5.8% and 15.1%, respectively. The interaction effect in a 90 μmol·mol-1 CO2 concentration and nitrogen fertilization treatment increased yield water use efficiency of 9.3% and 8.9% in spring wheat under 225 kg·hm-2 and 405 kg·hm-2, respectively. Likewise, the water use efficiency of spring wheat biomass in the nitrogen treatments of 225 kg·hm-2 and 405 kg·hm-2 decreased by 10.4% and 10.8% compared with CK, respectively. However, the nitrogen treatments of 135 kg·hm-2 and 315 kg·hm-2 decrease the water use efficiency of spring wheat biomass. The increase of 90 μmol·mol-1 CO2 concentration and nitrogen application resulted in the decrease of water use efficiency of 1000-grain weight. The water use efficiency of 1000-grain weight of spring wheatin the nitrogen treatments of 135 kg·hm-2 and 315 kg·hm-2 decreased by 13.9% and 21.2% compared with CK, respectively. A 180 μmol·mol-1 CO2 concentration and nitrogen treatments had no significant effects on water use efficiency of spring wheat biomass. Although nitrogen application increased the water use efficiency of spring wheat biomass, but it decreased the water utilization rate of 1000-grain weight in different degrees. In conclusion, the results obtained from this simulated experiment show that the interactivity of increasing in CO2 concentration and nitrogen level changed the water use efficiency dynamics in spring wheat.Regulating the fertilize amount on the base of increase of CO2 concentration should be beneficial in improving water use efficiency of spring wheat with global climate change variables. |
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