Abstract
Cowpea can obtain N through biological nitrogen fixation (BNF) through symbiosis with rhizobacteria. However, nodulation and BNF are influenced by edaphoclimatic factors that may bring about benefits or damages to the process, and the availability of nutrients is among the main factors that affect BNF and phosphorus (P). Thus, the present study aimed to determine the effectiveness of doses and sources of soluble P on nodulation, accumulation of nutrients, N and P absorption and use efficiency in cowpea plants inoculated with or without rhizobacteria. The experiment was conducted in a greenhouse at the Federal Institute of Education, Science and Technology, Rondônia, Colorado do Oeste-RO Campus, Brazil. The experimental design was randomized blocks in a 5 x 2 x 2 factorial arrangement, corresponding to five P rates (0, 20, 40, 80 and 160 kg ha-1 of P2O5), two soluble sources of P2O5 [single superphosphate (SSP) and thermophosphate], absence and presence of inoculation, with four replication. The findings of this study show that inoculation with Bradyrhizobium sp. promotes increment in the dry matter production and increases N and P absorption efficiency in cowpea plants. The single superphosphate led to higher N and P absorption efficiency, production of shoot dry matter and production of nodules, when compared with thermophosphate. Inoculation with Bradyrhizobium sp. associated with SSP fertilization promotes higher P absorption efficiency in cowpea plants. Therefore, increase in P rates promoted increments in P concentrations in cowpea leaves. Key words: Vigna unguiculata (L.), Bradyrhizobium, phosphorus, fertilization, nutrition.
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Claims 7
Claim · model-written summary
Bradyrhizobium inoculation increased cowpea dry matter production.
- Taxon
- cowpea plants
Vigna unguiculatae0 - Treatment
- inoculation with Bradyrhizobium sp.e0
- Interactor
- Bradyrhizobium sp.
Bradyrhizobiume0symbiont - Outcome
- dry matter productione0
- Direction
- incremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The findings of this study show that inoculation with Bradyrhizobium sp. promotes increment in the dry matter production and increases N and P absorption efficiency in cowpea plants.”
Claim · model-written summary
Bradyrhizobium inoculation increased N and P absorption efficiency in cowpea.
- Taxon
- cowpea plantsVigna unguiculatae0
- Treatment
- inoculation with Bradyrhizobium sp.e0
- Interactor
- Bradyrhizobium sp.Bradyrhizobiume0symbiont
- Outcome
- N and P absorption efficiencye0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The findings of this study show that inoculation with Bradyrhizobium sp. promotes increment in the dry matter production and increases N and P absorption efficiency in cowpea plants.”
Claim · model-written summary
Single superphosphate produced higher N and P absorption efficiency than thermophosphate in cowpea.
- Taxon
- cowpea plantsVigna unguiculatat0
- Treatment
- single superphosphatee0
- Outcome
- N and P absorption efficiencye0
- Direction
- highere0
- Comparator
- thermophosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea plants”
e0“The single superphosphate led to higher N and P absorption efficiency, production of shoot dry matter and production of nodules, when compared with thermophosphate.”
Claim · model-written summary
Single superphosphate produced higher production of shoot dry matter than thermophosphate in cowpea.
- Taxon
- cowpea plantsVigna unguiculatat0
- Treatment
- single superphosphatee0
- Outcome
- production of shoot dry mattere0
- Direction
- highere0
- Comparator
- thermophosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea plants”
e0“The single superphosphate led to higher N and P absorption efficiency, production of shoot dry matter and production of nodules, when compared with thermophosphate.”
Claim · model-written summary
Single superphosphate produced higher production of nodules than thermophosphate in cowpea.
- Taxon
- cowpea plantsVigna unguiculatat0
- Treatment
- single superphosphatee0
- Outcome
- production of nodulese0
- Direction
- highere0
- Comparator
- thermophosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea plants”
e0“The single superphosphate led to higher N and P absorption efficiency, production of shoot dry matter and production of nodules, when compared with thermophosphate.”
Claim · model-written summary
Bradyrhizobium inoculation with SSP increased cowpea P absorption efficiency.
- Taxon
- cowpea plantsVigna unguiculatae0
- Treatment
- Inoculation with Bradyrhizobium sp. associated with SSP fertilizatione0
- Interactor
- Bradyrhizobium sp.Bradyrhizobiume0symbiont
- Outcome
- P absorption efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with Bradyrhizobium sp. associated with SSP fertilization promotes higher P absorption efficiency in cowpea plants.”
Claim · model-written summary
Increasing P rates increased P concentrations in cowpea leaves.
- Taxon
- cowpea plantsVigna unguiculatat0
- Organ / stage
- cowpea leavese0
- Treatment
- increase in P ratese0
- Outcome
- P concentrationse0
- Direction
- incrementse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea plants”
e0“Therefore, increase in P rates promoted increments in P concentrations in cowpea leaves.”
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See all 78 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.