CLIMATE-CHANGE IMPACTS
; WATER-USE EFFICIENCY
; VAPOR-PRESSURE DEFICIT
; OPEN-AIR ELEVATION
; ATMOSPHERIC CO2
; CROP MODEL
; CARBON-DIOXIDE
; RISING CO2
; STOMATAL CONDUCTANCE
; ENRICHMENT FACE
WOS学科分类:
Multidisciplinary Sciences
WOS研究方向:
Science & Technology - Other Topics
英文摘要:
Elevated carbon-dioxide concentration [eCO(2)] is a key climate change factor affecting plant growth and yield. Conventionally, crop modeling work has evaluated the effect of climatic parameters on crop growth, without considering CO2. It is conjectured that a novel multimodal ensemble approach may improve the accuracy of modelled responses to eCO(2). To demonstrate the applicability of a multimodel ensemble of crop models to simulation of eCO(2), APSIM, CropSyst, DSSAT, EPIC and STICS were calibrated to observed data for crop phenology, biomass and yield. Significant variability in simulated biomass production was shown among the models particularly at dryland sites (44%) compared to the irrigated site (22%). Increased yield was observed for all models with the highest average yield at dryland site by EPIC (49%) and lowest under irrigated conditions (17%) by APSIM and CropSyst. For the ensemble, maximum yield was 45% for the dryland site and a minimum 22% at the irrigated site. We concluded from our study that process-based crop models have variability in the simulation of crop response to [eCO(2)] with greater difference under water-stressed conditions. We recommend the use of ensembles to improve accuracy in modeled responses to [eCO(2)].
1.PMAS Arid Agr Univ, Dept Agron, Rawalpindi 46300, Pakistan 2.Washington State Univ, Dept Biol Syst Engn, Pullman, WA 99164 USA 3.Swedish Univ Agr Sci, Dept Northern Agr Sci, S-90183 Umea, Sweden 4.Bahauddin Zakariya Univ, Fac Agr Sci & Technol, Dept Agron, Multan 60800, Pakistan 5.Sichuan Agr Univ, Coll Agron, Chengdu 611130, Sichuan, Peoples R China
Recommended Citation:
Ahmed, Mukhtar,Stockle, Claudio O.,Nelson, Roger,et al. Novel multimodel ensemble approach to evaluate the sole effect of elevated CO2 on winter wheat productivity[J]. SCIENTIFIC REPORTS,2019-01-01,9