Abstract
Abstract: The objective of this work was to evaluate the response of the BRS Tumucumaque cowpea (Vigna unguiculata) cultivar to liming and to phosphorus and potassium fertilization in the absence of inoculation or nitrogen fertilization, as well as to inoculation with selected Bradyrhizobium strains, in an upland forest area in the state of Amapá, eastern Amazon, Brazil. Seven experiments were conducted in field conditions, in order to evaluate six limestone, four phosphorus, and four potassium rates, besides the inoculation with four Bradyrhizobium strains. Leaf nitrogen concentrations, pod and grain dry mass per plant, grain yield, and soil pH, Al+3, and Ca+2 + Mg+2 were evaluated. The obtained data were subjected to the analysis of variance, to the regression analysis, or to test to compare means. The soil presented a high buffer power, but liming reduced its chemical limitations. Leaf nitrogen concentrations were correlated to cowpea grain yield. However, there is no effect of the interaction between potassium and phosphorus rates on grain yield. In addition, grain yield is not influenced by liming and potassium fertilization, but is increased by phosphorus fertilization. Inoculation with the UFLA 3-84 and INPA 03-11B strains promotes a greater grain yield than that with BR 3262 and BR 3267, as well as a similar grain yield to that of the control without inoculation.
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Claims 10
Claim · model-written summary
Liming reduced soil chemical limitations.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- liminge0
- Outcome
- chemical limitationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“liming reduced its chemical limitations”
t0“cowpea”
Claim · model-written summary
Leaf nitrogen concentrations correlated with cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Compound
- nitrogene0
- Outcome
- cowpea grain yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf nitrogen concentrations were correlated to cowpea grain yield”
t0“cowpea”
Claim · model-written summary
Potassium and phosphorus rates showed no interaction effect on grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- interaction between potassium and phosphorus ratese0
- Outcome
- grain yielde0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no effect of the interaction between potassium and phosphorus rates on grain yield”
t0“cowpea”
Claim · model-written summary
Liming did not influence grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- liminge0
- Outcome
- grain yielde0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield is not influenced by liming”
t0“cowpea”
Claim · model-written summary
Potassium fertilization did not influence grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- potassium fertilizatione0
- Outcome
- grain yielde0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield is not influenced by liming and potassium fertilization”
t0“cowpea”
Claim · model-written summary
Phosphorus fertilization increased grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- phosphorus fertilizatione0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield is not influenced by liming and potassium fertilization, but is increased by phosphorus fertilization”
t0“cowpea”
Claim · model-written summary
UFLA 3-84 inoculation produced greater grain yield than BR 3262 and BR 3267 inoculation.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- UFLA 3-84e0
- Interactor
- UFLA 3-84e0symbiont
- Outcome
- grain yielde0
- Direction
- greatere0
- Comparator
- BR 3262 and BR 3267e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with the UFLA 3-84 and INPA 03-11B strains promotes a greater grain yield than that with BR 3262 and BR 3267”
t0“cowpea”
Claim · model-written summary
INPA 03-11B inoculation produced greater grain yield than BR 3262 and BR 3267 inoculation.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- INPA 03-11Be0
- Interactor
- INPA 03-11Be0symbiont
- Outcome
- grain yielde0
- Direction
- greatere0
- Comparator
- BR 3262 and BR 3267e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with the UFLA 3-84 and INPA 03-11B strains promotes a greater grain yield than that with BR 3262 and BR 3267”
t0“cowpea”
Claim · model-written summary
UFLA 3-84 inoculation gave grain yield similar to uninoculated controls.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- UFLA 3-84e0
- Interactor
- UFLA 3-84e0symbiont
- Outcome
- grain yielde0
- Direction
- similare0
- Comparator
- control without inoculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with the UFLA 3-84 and INPA 03-11B strains promotes a greater grain yield than that with BR 3262 and BR 3267, as well as a similar grain yield to that of the control without inoculation”
t0“cowpea”
Claim · model-written summary
INPA 03-11B inoculation gave grain yield similar to uninoculated controls.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- INPA 03-11Be0
- Interactor
- INPA 03-11Be0symbiont
- Outcome
- grain yielde0
- Direction
- similare0
- Comparator
- control without inoculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with the UFLA 3-84 and INPA 03-11B strains promotes a greater grain yield than that with BR 3262 and BR 3267, as well as a similar grain yield to that of the control without inoculation”
t0“cowpea”
The same questions in other papers
phosphorus · yield · Vigna unguiculata (cowpea)Results differ
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32 in the opposite direction
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274 papers in the same direction as this paper · 15 in the opposite direction · 2 reporting no difference from an alternative
- no effect
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- no effect
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See all 292 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.