TY - JOUR
T1 - Integrating partial root-zone drying and saline water irrigation to sustain sunflower production in freshwater-scarce regions
AU - Khaleghi, Moazam
AU - Hassanpour, Farzad
AU - Karandish, Fatemeh
AU - Shahnazari, Ali
N1 - Elsevier deal
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Applying saline water resources for irrigating croplands requires serious attentions when sustainable agriculture is considered. A two-year field investigation was carried out in a drip-irrigated sunflower field under six irrigation treatments, including (i) full freshwater irrigation (FI), full irrigation with diluted seawater (DS) (SI), alternate DS-freshwater irrigation (FSI), freshwater-PRD (partial root-zone drying) irrigation with 25 % less water than full (PRD
1), DS-PRD irrigation with 25 % less water than full (PRD
2), alternate DS-freshwater irrigation under PRD with 25 % less water than full (PRD
3), in three replicates. Compared to the FI treatment, crop yield was reduced by 3.1–32 %, with the lowest one under PRD
1. Among the DS treatments, PRD
3, resulted in the highest grain yield (4306 kg ha
−1), grain nitrogen content (2.83 %), oil yield (1907 kg ha
−1) and irrigation water productivity (1.10). PRD
3 also saved freshwater by 20 %, and kept soil salinity of the rooting-zone below the maximum crop tolerance threshold. Based on the results, PRD
3 might be a cost-effective pathway which guarantees the sustainable application of diluted seawater in the irrigated sunflower lands.
AB - Applying saline water resources for irrigating croplands requires serious attentions when sustainable agriculture is considered. A two-year field investigation was carried out in a drip-irrigated sunflower field under six irrigation treatments, including (i) full freshwater irrigation (FI), full irrigation with diluted seawater (DS) (SI), alternate DS-freshwater irrigation (FSI), freshwater-PRD (partial root-zone drying) irrigation with 25 % less water than full (PRD
1), DS-PRD irrigation with 25 % less water than full (PRD
2), alternate DS-freshwater irrigation under PRD with 25 % less water than full (PRD
3), in three replicates. Compared to the FI treatment, crop yield was reduced by 3.1–32 %, with the lowest one under PRD
1. Among the DS treatments, PRD
3, resulted in the highest grain yield (4306 kg ha
−1), grain nitrogen content (2.83 %), oil yield (1907 kg ha
−1) and irrigation water productivity (1.10). PRD
3 also saved freshwater by 20 %, and kept soil salinity of the rooting-zone below the maximum crop tolerance threshold. Based on the results, PRD
3 might be a cost-effective pathway which guarantees the sustainable application of diluted seawater in the irrigated sunflower lands.
KW - Diluted seawater
KW - Irrigation water productivity
KW - Partial root-zone drying
KW - Salt accumulation
KW - Sunflower production
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85080878215&partnerID=8YFLogxK
U2 - 10.1016/j.agwat.2020.106094
DO - 10.1016/j.agwat.2020.106094
M3 - Article
VL - 234
SP - 106094
JO - Agricultural water management
JF - Agricultural water management
SN - 0378-3774
M1 - 106094
ER -