Abstract
Salt stress is highlighted as one of the limiting factors for the establishment of agriculture in the semiarid region of Northeastern Brazil. In this context, it is essential to look for new strategies aiming at minimizing the effects of salt stress on the crops. The present work aimed to evaluate the photochemical efficiency, photosynthetic pigments, and growth of the watermelon cv. Sugar Baby under different use strategies with saline waters and nitrogen fertilization. The experiment was conducted in a protected environment at the Center of Technology and Natural Resources of the Federal University of Campina Grande, municipality of Campina Grande, Paraíba. An experimental design in randomized blocks was adopted, arranged in a 6 x 2 factorial scheme, with six management strategies of water salinity and two nitrogen doses (corresponding to 50 and 100% of the recommendation), with five replications. Two salinity levels of the irrigation water were studied, one with low and another with a high level of electrical conductivity of the water (ECw = 0.8 and 3.2 dS m-1). The watermelon cv. Sugar Baby expressed higher sensitivity to salt stress in the flowering phase, with a decrease in the synthesis of chlorophyll b, chlorophyll total, and carotenoids. The 50% dose of N provided an increment in the initial fluorescence, stem diameter, and the number of leaves of the watermelon cv. Sugar Baby. The length of the main branch of the watermelon plants decreased with the salt stress applied in the fructification phase; however, the fertilization with 100% of N stimulated a higher growth when the irrigation with saline waters was performed at the vegetative and flowering phases.
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Claims 4
Claim · model-written summary
Watermelon was more sensitive to salt stress during flowering, with lower chlorophyll b, total chlorophyll and carotenoids.
- Taxon
- watermelon
Citrullus lanatuse0 - Material
- Sugar Babye0
- Organ / stage
- flowering phasee0
- Treatment
- salt stress in the flowering phasee0
- Outcome
- chlorophyll b, chlorophyll total, and carotenoidse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The watermelon cv. Sugar Baby expressed higher sensitivity to salt stress in the flowering phase, with a decrease in the synthesis of chlorophyll b, chlorophyll total, and carotenoids.”
Claim · model-written summary
The 50% nitrogen dose increased initial fluorescence, stem diameter and leaf number.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- Sugar Babye0
- Treatment
- 50% dose of Ne0
- Outcome
- initial fluorescence, stem diameter, and the number of leavese0
- Direction
- incremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 50% dose of N provided an increment in the initial fluorescence, stem diameter, and the number of leaves of the watermelon cv. Sugar Baby.”
Claim · model-written summary
Salt stress during fructification reduced main branch length.
- Taxon
- watermelonCitrullus lanatuse0
- Organ / stage
- fructification phasee0
- Treatment
- salt stress applied in the fructification phasee0
- Outcome
- length of the main branche0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of the main branch of the watermelon plants decreased with the salt stress applied in the fructification phase”
Claim · model-written summary
Full nitrogen fertilization stimulated higher growth when saline irrigation occurred during vegetative and flowering phases.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- fertilization with 100% of Ne0
- Outcome
- growthe0
- Direction
- highere0
- Qualifier
- irrigation with saline waters was performed at the vegetative and flowering phasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fertilization with 100% of N stimulated a higher growth when the irrigation with saline waters was performed at the vegetative and flowering phases.”
t0“watermelon”
The same questions in other papers
fertilization · growth · Citrullus lanatus (watermelon)Positive and negative results
38 papers in the same direction as this paper · 5 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
42 papers more in this group
See all 46 papers →salinity · physiology: pigments · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.