Water use efficiency of chickpea agro-ecosystems will be boosted by positive effects of CO2 and using suitable genotype × environment × management under climate change conditions

Seyedreza Amiri, Hamed Eyni-Nargeseh, Sajjad Rahimi-Moghaddam and Khosro Azizi

Agricultural Water Management, 2021, vol. 252, issue C

Abstract: The agricultural production faces the inevitable challenges under the climate change conditions which threaten the food security. Under these circumstances, the increase of productivity can be regarded to ensure the food security. The interaction of genetic management determines the performance of given crop and environmental factors, and these elements should be simultaneously considered to have a sustainable production. To enhance the productivity and eco-efficiency of chickpea agro-ecosystems in the west and northwest of Iran, we optimized the genotype (G) × environment (E) × management (M) interactions to access optimum grain yield and water use efficiency using SSM-legume model. Three genotypes, eight locations, and 3 irrigation regimes were considered G, E, and M factors, respectively. The projections of future climate were conducted due to a 5–multi‐model ensemble under two emission scenarios (RCP4.5 and RCP8.5) for 2040–2070 using a methodology introduced by Agricultural Model Intercomparison and Improvement Project (AgMIP). The results indicated that across two RCPs, the climate change increased chickpea grain yield (11%) due to the positive effects of rising CO2 concentration which slightly increased WUE (0.03%) based on an increase in the evapotranspiration (10.9%) and mean temperature (3.4%) and a decrease during the chickpea growing period (21.9%). However, these decreases and increases can be mitigated and boosted using an optimal G × E × M combination. ILC482 (mid-maturity genotype) × cold northwest environment × SI Pod-60 (supplementary irrigation of 60 mm at pod filling) was the best G × E × M interaction due to optimum WUE (6.98 kg ha-1 mm-1) and grain yield (1808.4 kg ha-1) for chickpea agro-ecosystems in upcoming period (2040–2070). In general, climate change and rising CO2 concentration open up the opportunities to produce more grain yield in chickpea agro-ecosystems. Moreover, this production can be sustainably generated regarding WUE by adopting a suitable G × E × M interaction.

Keywords: AgMIP methodology; Grain yield; Irrigation regime; SSM-legume model; WUE (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378377421001931
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:252:y:2021:i:c:s0378377421001931

DOI: 10.1016/j.agwat.2021.106928

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().