Abstract
Using nitrogen (N) to increase plant tolerance to salinity has been tested in many species. However, in addition to controversial results, most studies are conducted with annual species and/or in the initial growth stage and there are almost no studies with perennial fruit crops in the production stage. Thus, this study aimed to evaluate the production components and post-harvest quality of ‘Paluma’ guava irrigated with water of increasing salinity in soil fertilized with N. The experiment was carried out for two years in drainage lysimeters in an experimental area of the Federal University of Campina Grande (UFCG), Pombal, PB, Brazil. The experimental design was in randomized blocks, in 5 x 4 factorial scheme, with of five levels of water salinity – ECw (NaCl) (0.3, 1.1, 1.9, 2.7 and 3.5 dS m-1) and four N doses (ureia) (70, 100, 130 and 160% of the recommended dose - 541.1 mg of N dm-3 of soil per year), with three replicates. Number of fruits, mean fruit weight, production per plant, polar and equatorial diameters of fruit and contents of soluble solids and ascorbic acid (vitamin C) decreased linearly with the increase in irrigation water salinity from 0.3 dS m-1. The interaction between water salinity and N doses and the isolated action of N did not interfere statistically with the studied variables.
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Claims 5
Claim · model-written summary
Fruit number, mean weight, and production per plant declined linearly as irrigation water salinity increased from 0.3 dS m-1.
- Taxon
- guava
Psidium guajavat0 - Treatment
- irrigation water salinitye0
- Outcome
- Number of fruits, mean fruit weight, production per plante0
- Direction
- decreased linearlye0
- Comparator
- 0.3 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of fruits, mean fruit weight, production per plant, polar and equatorial diameters of fruit and contents of soluble solids and ascorbic acid (vitamin C) decreased linearly with the increase in irrigation water salinity from 0.3 dS m-1.”
t0“guava fruits”
Claim · model-written summary
Fruit polar and equatorial diameters declined linearly as irrigation water salinity increased.
- Taxon
- guavaPsidium guajavat0
- Treatment
- irrigation water salinitye0
- Outcome
- polar and equatorial diameters of fruite0
- Direction
- decreased linearlye0
- Comparator
- 0.3 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of fruits, mean fruit weight, production per plant, polar and equatorial diameters of fruit and contents of soluble solids and ascorbic acid (vitamin C) decreased linearly with the increase in irrigation water salinity from 0.3 dS m-1.”
t0“guava fruits”
Claim · model-written summary
Fruit soluble solids and ascorbic acid contents declined linearly as irrigation water salinity increased.
- Taxon
- guavaPsidium guajavat0
- Treatment
- irrigation water salinitye0
- Outcome
- contents of soluble solids and ascorbic acid (vitamin C)e0
- Direction
- decreased linearlye0
- Comparator
- 0.3 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of fruits, mean fruit weight, production per plant, polar and equatorial diameters of fruit and contents of soluble solids and ascorbic acid (vitamin C) decreased linearly with the increase in irrigation water salinity from 0.3 dS m-1.”
t0“guava fruits”
Claim · model-written summary
Water salinity and nitrogen dose interaction did not statistically affect the studied variables.
- Taxon
- guavaPsidium guajavat0
- Treatment
- interaction between water salinity and N dosese0
- Outcome
- studied variablese0
- Direction
- did not interfere statisticallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction between water salinity and N doses and the isolated action of N did not interfere statistically with the studied variables.”
t0“guava fruits”
Claim · model-written summary
Nitrogen dose alone did not statistically affect the studied variables.
- Taxon
- guavaPsidium guajavat0
- Treatment
- isolated action of Ne0
- Outcome
- studied variablese0
- Direction
- did not interfere statisticallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction between water salinity and N doses and the isolated action of N did not interfere statistically with the studied variables.”
t0“guava fruits”
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