Abstract
Field experiments were conducted at two locations (one at normal soil, BARI Gazipur and another at saline soil, ARS, Benarpota, Satkhira) during two consecutive years (2014 and 2015) to study the effects of deficit irrigation (DI) on yield, water productivity and economics on sunflower production. Design was RCB and irrigation treatments were: FI-100 (T1), DI-80 (T2) and DI-60 (T3) at vegetative, pre-flowering and heading stages, FI-100 (T4), DI-80 (T5) and DI-60 (T6) at vegetative and pre-flowering stages, and FI-100 (T7), DI-80 (T8) and DI-60 (T9) at vegetative and heading stages. Results indicated that DI treatments significantly reduced plant growth parameters (canopy coverage, and biomass except root length density), yield attributes and seed yield compared to full irrigation (FI) (T1). Pre-flowering stage was the critical stage to DI. DI-60 at vegetative and pre-flowering stages (T6) produced 2.18 and 2.53 t ha−1 seed yields by saving 68.15 and 54.75% water at normal and at saline soil. This treatment (T6) also gave the highest water productivity, irrigation water productivity, and net financial return. The results will be helpful for taking policy decision regarding efficient irrigation and water management under prevailing water scarce situation.
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Claims 8
Claim · model-written summary
Deficit irrigation significantly reduced sunflower plant growth parameters (canopy coverage and biomass, not root length density) compared with full irrigation.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- DI treatmentse1
- Outcome
- plant growth parameters (canopy coverage, and biomass except root length density)e1
- Direction
- reducede1
- Qualifier
- except root length densitye1
- Comparator
- full irrigation (FI) (T1)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e1“DI treatments significantly reduced plant growth parameters (canopy coverage, and biomass except root length density), yield attributes and seed yield compared to full irrigation (FI) (T1)”
Claim · model-written summary
Deficit irrigation significantly reduced sunflower yield attributes and seed yield compared with full irrigation.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- DI treatmentse1
- Outcome
- yield attributes and seed yielde1
- Direction
- reducede1
- Comparator
- full irrigation (FI) (T1)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e1“DI treatments significantly reduced plant growth parameters (canopy coverage, and biomass except root length density), yield attributes and seed yield compared to full irrigation (FI) (T1)”
Claim · model-written summary
The pre-flowering stage was the critical stage for sunflower response to deficit irrigation.
- Taxon
- sunflowerHelianthus annuust0
- Organ / stage
- Pre-flowering stagee2
- Treatment
- DIe2
- Outcome
- critical stage to DIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e2“Pre-flowering stage was the critical stage to DI”
Claim · model-written summary
DI-60 at vegetative and pre-flowering stages gave a seed yield of 2.18 t ha−1 at normal soil.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- DI-60 at vegetative and pre-flowering stages (T6)e3
- Outcome
- seed yieldse3
- Value
- 2.18e3
- Setting
- normal and at saline soile3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e3“DI-60 at vegetative and pre-flowering stages (T6) produced 2.18 and 2.53 t ha−1 seed yields by saving 68.15 and 54.75% water at normal and at saline soil”
Claim · model-written summary
DI-60 at vegetative and pre-flowering stages gave a seed yield of 2.53 t ha−1 at saline soil.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- DI-60 at vegetative and pre-flowering stages (T6)e3
- Outcome
- seed yieldse3
- Value
- 2.53e3
- Setting
- normal and at saline soile3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e3“DI-60 at vegetative and pre-flowering stages (T6) produced 2.18 and 2.53 t ha−1 seed yields by saving 68.15 and 54.75% water at normal and at saline soil”
Claim · model-written summary
DI-60 at vegetative and pre-flowering stages saved 68.15% water at normal soil.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- DI-60 at vegetative and pre-flowering stages (T6)e3
- Outcome
- watere3
- Direction
- savinge3
- Value
- 68.15e3
- Setting
- normale3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e3“DI-60 at vegetative and pre-flowering stages (T6) produced 2.18 and 2.53 t ha−1 seed yields by saving 68.15 and 54.75% water at normal and at saline soil”
Claim · model-written summary
DI-60 at vegetative and pre-flowering stages saved 54.75% water at saline soil.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- DI-60 at vegetative and pre-flowering stages (T6)e3
- Outcome
- watere3
- Direction
- savinge3
- Value
- 54.75e3
- Setting
- saline soile3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e3“DI-60 at vegetative and pre-flowering stages (T6) produced 2.18 and 2.53 t ha−1 seed yields by saving 68.15 and 54.75% water at normal and at saline soil”
Claim · model-written summary
The T6 treatment gave the highest water productivity, irrigation water productivity and net financial return among the sunflower irrigation treatments.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- T6e4
- Outcome
- water productivity, irrigation water productivity, and net financial returne4
- Direction
- higheste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“economic return of sunflower”
e4“This treatment (T6) also gave the highest water productivity, irrigation water productivity, and net financial return”
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