Abstract
ABSTRACT Salinity is one of the abiotic stresses that affect gas exchange and growth of pomegranate. In this context, the application of nitrogen fertilizer through the leaves can minimize these effects. Thus, the objective of present study was to evaluate the effect of foliar nitrogen fertilization on pomegranate seedlings irrigated with brackish water. The design used was randomized blocks, in an incomplete factorial scheme (Central Composite Design) with five electrical conductivities of irrigation water - ECw (0.50, 1.15, 2.75, 4.35, and 5.00 dS m-1) and five doses of foliar nitrogen fertilization - FNF (0, 0.33, 1.15, 1.97, and 2.30 g L-1), with four replicates and two plants per experimental plot. Plant height, number of leaves, stem diameter, and gas exchange (stomatal conductance, net photosynthesis, intercellular CO2 concentration, transpiration rate, instantaneous carboxylation efficiency, instantaneous water use efficiency, and intrinsic water use efficiency) were evaluated at 60 days after the beginning of irrigation with saline water. Salinity of irrigation water negatively affects the gas exchange of pomegranate seedlings. Foliar nitrogen fertilization up to 1.31 g L-1 improves plant height and number of leaves in pomegranate seedlings under salt stress. Foliar nitrogen fertilization up to 1.59 g L-1 increases the net photosynthesis of pomegranate seedlings.
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Claims 4
Claim · model-written summary
Saline irrigation impaired pomegranate seedling gas exchange.
- Taxon
- pomegranate
Punica granatume0 - Treatment
- Salinity of irrigation watere0
- Outcome
- gas exchangee0
- Direction
- negatively affectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity of irrigation water negatively affects the gas exchange of pomegranate seedlings”
Claim · model-written summary
Foliar nitrogen up to 1.31 g L-1 improved seedling height.
- Taxon
- pomegranatePunica granatume0
- Treatment
- Foliar nitrogen fertilization up to 1.31 g L-1e0
- Outcome
- plant heighte0
- Direction
- improvese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar nitrogen fertilization up to 1.31 g L-1 improves plant height and number of leaves in pomegranate seedlings under salt stress”
Claim · model-written summary
Foliar nitrogen up to 1.31 g L-1 improved leaf number.
- Taxon
- pomegranatePunica granatume0
- Treatment
- Foliar nitrogen fertilization up to 1.31 g L-1e0
- Outcome
- number of leavese0
- Direction
- improvese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar nitrogen fertilization up to 1.31 g L-1 improves plant height and number of leaves in pomegranate seedlings under salt stress”
Claim · model-written summary
Foliar nitrogen up to 1.59 g L-1 increased net photosynthesis.
- Taxon
- pomegranatePunica granatume0
- Treatment
- Foliar nitrogen fertilization up to 1.59 g L-1e0
- Outcome
- net photosynthesise0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar nitrogen fertilization up to 1.59 g L-1 increases the net photosynthesis of pomegranate seedlings”
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