Abstract
The aim of this study was to evaluate the salinity tolerance of cotton plants grown under saline stress in two substrates. The experiment was carried out in an experimental area at the Centec Cariri School of Technology (FATEC Cariri), located in the city of Juazeiro do Norte, Ceará state. A completely randomized design was applied, using a 4 x 2 factorial scheme consisting of four irrigation water salinity levels (0.5; 3.0; 5.0, and 10 dS m-1) and two substrates (0 - 20 cm soil layers and earthworm humus) with four replications. To assess the tolerance of cotton plants to salinity, the methodology proposed by Fageria (1985) was used. The percentage reductions in plant height, absolute growth rate, stem diameter, number of leaves, and leaf area of cotton plants submitted to different levels of irrigation with saline water in the two substrates were quantified, comparing them to the control (plants cultivated with water whose electrical conductivity is equal to 0.5 dS m-1). Based on the found results, it was found that the used type of substrate changed the classification of cotton salinity tolerance, especially at the highest salinity levels tested (5.0 and 10 dS m-1). When considering the data of stem diameter and leaf area, cotton plants grown in soil substrate showed greater tolerance to salinity. However, from the data regarding absolute growth rate and number of leaves, cotton plants grown in earthworm humus substrate were more tolerant to salinity.
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Claims 3
Claim · model-written summary
Substrate changed the classification of cotton salinity tolerance, particularly at 5.0 and 10 dS m-1.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- type of substratee0
- Outcome
- classification of cotton salinity tolerancee0
- Qualifier
- 5.0 and 10 dS m-1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the used type of substrate changed the classification of cotton salinity tolerance, especially at the highest salinity levels tested (5.0 and 10 dS m-1).”
Claim · model-written summary
Cotton in soil substrate had greater salinity tolerance by stem diameter and leaf area.
- Taxon
- cotton plantsGossypium hirsutume0
- Treatment
- soil substratee0
- Outcome
- stem diameter and leaf areae0
- Direction
- greater tolerancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When considering the data of stem diameter and leaf area, cotton plants grown in soil substrate showed greater tolerance to salinity.”
Claim · model-written summary
Cotton in earthworm humus substrate had greater salinity tolerance by growth rate and leaf number.
- Taxon
- cotton plantsGossypium hirsutume0
- Treatment
- earthworm humus substratee0
- Outcome
- absolute growth rate and number of leavese0
- Direction
- more tolerante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, from the data regarding absolute growth rate and number of leaves, cotton plants grown in earthworm humus substrate were more tolerant to salinity.”
The same questions in other papers
growing medium · growth · Gossypium hirsutum (cotton)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
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.