Abstract
The use of nitrogen-fixing bacteria reduces the use of synthetic nitrogen fertilizers. However, salt stress can negatively affect the establishment of biological nitrogen fixation (BNF). In this context, the aim was to evaluate the use of brackish water at different phenological stages on the gas exchange and mineral composition of inoculated and non-inoculated peanut crops. The experimental design used was completely randomized, following a 5x2 factorial arrangement, with four replications, using five irrigation strategies with brackish water with an electrical conductivity of 5.0 dS m-1 applied at different phenological stages of the crop: E1 - at 14 days after sowing - DAS (vegetative stage); E2 - at 25 DAS (flowering stage); E3 - at 36 DAS (gynophore emergence stage); E4 - at 46 DAS (pod formation stage); and E5 - control, and inoculated and non-inoculated plants. The earlier the salt stress is applied, the lower the gas exchange in the peanut crop, with more significant effects up to 36 DAS, the phase of gynophore emergence and elongation, so plants inoculated with rhizobia show greater efficiency in the use of brackish water. Similarly, from 36 DAS onwards, leaf mineral content decreases, with the exception of sodium, which increases. It is recommended to use brackish water associated with the use of Bradyrhizobium spp. in the pod formation stage of the peanut crop.
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Claims 5
Claim · model-written summary
Earlier brackish-water stress lowered peanut gas exchange, particularly through 36 days after sowing.
- Taxon
- peanut crop
Arachis hypogaeae0 - Treatment
- salt stresse0
- Outcome
- gas exchangee0
- Direction
- lowere0
- Qualifier
- up to 36 DASe0
- Comparator
- earliere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The earlier the salt stress is applied, the lower the gas exchange in the peanut crop, with more significant effects up to 36 DAS”
Claim · model-written summary
Rhizobial inoculation improved peanut efficiency in using brackish water.
- Taxon
- peanutsArachis hypogaeat0
- Treatment
- inoculated with rhizobiae0
- Interactor
- rhizobiae0symbiont
- Outcome
- efficiency in the use of brackish watere0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants inoculated with rhizobia show greater efficiency in the use of brackish water”
t0“peanuts”
Claim · model-written summary
Peanut leaf mineral content decreased from 36 days after sowing onward.
- Taxon
- peanutsArachis hypogaeat0
- Organ / stage
- leafe0
- Outcome
- mineral contente0
- Direction
- decreasese0
- Qualifier
- from 36 DAS onwardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 36 DAS onwards, leaf mineral content decreases”
t0“peanuts”
Claim · model-written summary
Peanut leaf sodium increased from 36 days after sowing onward.
- Taxon
- peanutsArachis hypogaeat0
- Organ / stage
- leafe0
- Outcome
- sodiume0
- Direction
- increasese0
- Qualifier
- from 36 DAS onwardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 36 DAS onwards, leaf mineral content decreases, with the exception of sodium, which increases”
t0“peanuts”
Claim · model-written summary
The authors recommend brackish water together with Bradyrhizobium spp. at peanut pod formation.
- Taxon
- peanut cropArachis hypogaeae0
- Interactor
- Bradyrhizobium spp.
Bradyrhizobiume0symbiont - Outcome
- use brackish water associated with the use of Bradyrhizobium spp. in the pod formation stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is recommended to use brackish water associated with the use of Bradyrhizobium spp. in the pod formation stage of the peanut crop”
The same questions in other papers
salinity · physiology: gas exchange · Arachis hypogaea (peanut)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.