| Title | Responses of Water Fluxes and Water-Use Efficiency of Maize to Warming Based on Water Transformation Dynamical Processes Experimental Device (WTDPED) Experiment |
| Authors | Wu, Yali Ma, Ying Song, Xianfang Yang, Lihu Yang, Shengtian |
| Affiliation | Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China. Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China. Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Sinofrance Inst Earth Syst Sci, Beijing 100871, Peoples R China. Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China. |
| Keywords | water balance components water use efficiency GSPAC warming maize CLIMATE-CHANGE SCENARIOS ZEA-MAYS L. PHOTOSYNTHETIC ACCLIMATION SOLUTE TRANSPORT LARGE LYSIMETER CHANGE IMPACTS CROP YIELD PO VALLEY SIMULATION BALANCE |
| Issue Date | 2018 |
| Publisher | WATER |
| Citation | WATER. 2018, 10(11). |
| Abstract | Evaluating the impacts of warming on water balance components in the groundwater-soil-plant-atmosphere continuum (GSPAC) and crop growth are crucial for assessing the risk of water resources and food security under future global warming. A water transformation dynamical processes experimental device (WTDPED) was developed using a chamber coupled with a weighing lysimeter and groundwater supply system, which could simultaneously control both climatic and ground-water level conditions and accurately monitor water fluxes in the GSPAC. Two experiments with maize under increased temperature by 2 degrees C (T-warm) and ambient temperature (T-control) scenarios were conducted via the WTDPED. The duration of growing season decreased from 125 days under T-control to 117 days under 2 degrees C warming. There was little difference of total evapotranspiration (ET) (332.6 mm vs. 332.5 mm), soil water storage change (Delta W) (-119.0 mm vs. -119.0 mm), drainage (D) (-13.6 mm vs. -13.5 mm) between T-control and T-warm experiments. The average daily ET for maize significantly increased by approximately 6.7% (p < 0.05) in the T-warm experiment, especially during the sixth leaf to tasseling-silking stage with an increase of 0.36 mm with respect to the T-control experiment. There were evident decreases in LAI (leaf area index), whereas non-significant decreases in mean stem diameter, crop height and leaf chlorophyll content under T-warm compared to T-control experiment. However, the chlorophyll content increased by 12% during the sixth leaf to tasseling-silking stage under 2 degrees C warming, which accelerated the photosynthesis and transpiration rate. The grain yield and water-use efficiency (WUE) for maize increased by 11.0% and 11.1% in the T-warm experiment, respectively, especially due to enhanced growth during the sixth leaf to tasseling-silking stage. This study provided important references for agricultural planting and water management to adapt to a warming environment. |
| URI | http://hdl.handle.net/20.500.11897/570953 |
| ISSN | 2073-4441 |
| DOI | 10.3390/w10111660 |
| Indexed | SCI(E) |
| Appears in Collections: | 城市与环境学院 地表过程分析与模拟教育部重点实验室 |
