Abstract
The objective of this work was to verify the influence of light environments combined with rhizobia inoculation on cowpea growth and productivity. A completely random design was used in a 4x4 factorial scheme, with four light environments, four nitrogen sources and eight replicates in split plot parcels. Light environments were set by means of photo-conversion and thermo-conversion nettings (Aluminet®, red net and black net) and control treatment without shading (full sun). Nitrogen sources were constituted by the strains INPA 03-11B - SEMIA 6462 (Bradyrhizobium elkanni) and UFLA 03-84 - SEMIA 6461 (Bradyrhizobium viridifuturi), and two control treatments: with 70 kg ha-1 of mineral nitrogen and without N. Plant height, indices of chlorophyll a, b and total chlorophill, the number of leaves, number of nodules, dry matter of nodules, dry matter of the aerial portion, dry matter of roots and total dry matter, relative efficiency, gathering of nitrogen in the aerial portion, number, length and matter of pods per plant and dry matter of 100 grains, were evaluated. . There was interaction between light conditions and nitrogen sources for the number of nodules. Individual effect was observed in all other variables. Strain INPA 03-11B was able to promote higher nodulation in cowpea plants in light environments under full sun and Aluminet and the strain UFLA 03-84 only under full sun conditions. However, the efficiency of diazotrophic bacteria to promote vegetative growth, nitrogen gathering and production was not influenced by different light environments. Thus, full sun cultivation is recommended, independently of the nitrogen source used.
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Claims 6
Claim · model-written summary
Light environment and nitrogen source interacted for cowpea nodule number.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- light conditions and nitrogen sourcese0
- Outcome
- number of nodulese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was interaction between light conditions and nitrogen sources for the number of nodules.”
t0“cowpea”
Claim · model-written summary
Individual effects were observed for all other evaluated variables.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- all other variablese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Individual effect was observed in all other variables.”
t0“cowpea”
Claim · model-written summary
INPA 03-11B promoted higher cowpea nodulation under full sun and Aluminet.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Strain INPA 03-11Be0
- Interactor
- INPA 03-11Be0symbiont
- Outcome
- nodulatione0
- Direction
- highere0
- Qualifier
- full sun and Aluminete0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strain INPA 03-11B was able to promote higher nodulation in cowpea plants in light environments under full sun and Aluminet”
Claim · model-written summary
UFLA 03-84 promoted higher cowpea nodulation only under full sun.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- strain UFLA 03-84e0
- Interactor
- UFLA 03-84e0symbiont
- Outcome
- strain UFLA 03-84 only under full sun conditionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and the strain UFLA 03-84 only under full sun conditions.”
t0“cowpea”
Claim · model-written summary
Light environments did not influence diazotrophic bacterial efficiency for vegetative growth, nitrogen gathering and production.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- different light environmentse0
- Interactor
- diazotrophic bacteriae0symbiont
- Outcome
- efficiency of diazotrophic bacteria to promote vegetative growth, nitrogen gathering and productione0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the efficiency of diazotrophic bacteria to promote vegetative growth, nitrogen gathering and production was not influenced by different light environments.”
t0“cowpea”
Claim · model-written summary
Full sun cultivation was recommended regardless of nitrogen source.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- full sun cultivation is recommendede0
- Qualifier
- independently of the nitrogen source usede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, full sun cultivation is recommended, independently of the nitrogen source used.”
t0“cowpea”
The same questions in other papers
light · yield · Vigna unguiculata (cowpea)Positive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →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.