Abstract
ABSTRACT Low grain yield of cowpea is influenced by several production factors, especially inadequate soil fertilization, in particular, phosphorus application. Tropical soils have low phosphorus and zinc levels due to either the source material or the absence of fertilization, which restricts cowpea grain yield; besides of that, zinc deficiency is accentuated with phosphor application. This study aimed to evaluate the effect of fertilization with phosphorus and zinc on cowpea yield. Two experiments were conducted, one with ‘BRS Guariba’ cultivar and another with ‘BRS Aracê’ cultivar. Both of them were performed on a medium-texture dystrophic Yellow Latosol (Oxisol), in the city of Magalhães de Almeida, Maranhão state (Brazil), in 2015. The experimental design was a randomized complete block in a 4 x 4 factorial scheme, using four doses of phosphorus (0, 40, 80, and 120 kg P2O5 ha-1), and four of zinc (0, 2, 4, and 6 kg of Zn ha-1). There was an interaction between these minerals (p<0.01). Maximum grain yields of 1,376 kg ha-1 and 2,165 kg ha-1 were obtained at doses of 118 kg P2O5 ha-1 and 0.9 kg zinc ha-1 for ‘BRS Guariba’, and 120 kg P2O5 ha-1 and 3.1 kg zinc ha-1 for ‘BRS Aracê’, respectively. The production component of greatest influence on grain yield was the number of pods per plant, with average values of 6 and 10 for ‘BRS Guariba’ and ‘BRS Aracê’ cultivars, respectively. The mean correlation coefficient was 0.82 (p < 0.01).
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Claims 6
Claim · model-written summary
Phosphorus and zinc showed a significant interaction in cowpea.
- Taxon
- COWPEA
Vigna unguiculatat0 - Treatment
- these mineralse0
- Outcome
- interaction between these mineralse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was an interaction between these minerals (p<0.01)”
t0“COWPEA”
Claim · model-written summary
For cultivar BRS Guariba, maximum grain yield was 1,376 kg ha-1, obtained at 118 kg P2O5 ha-1 and 0.9 kg zinc ha-1.
- Taxon
- COWPEAVigna unguiculatat0
- Material
- BRS Guaribae0
- Treatment
- 118 kg P2O5 ha-1 and 0.9 kg zinc ha-1e0
- Outcome
- grain yieldse0
- Direction
- Maximume0
- Value
- 1,376 kg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum grain yields of 1,376 kg ha-1 and 2,165 kg ha-1 were obtained at doses of 118 kg P2O5 ha-1 and 0.9 kg zinc ha-1 for ‘BRS Guariba’, and 120 kg P2O5 ha-1 and 3.1 kg zinc ha-1 for ‘BRS Aracê’, respectively”
t0“COWPEA”
Claim · model-written summary
For cultivar BRS Aracê, maximum grain yield was 2,165 kg ha-1, obtained at 120 kg P2O5 ha-1 and 3.1 kg zinc ha-1.
- Taxon
- COWPEAVigna unguiculatat0
- Material
- BRS Aracêe0
- Treatment
- 120 kg P2O5 ha-1 and 3.1 kg zinc ha-1e0
- Outcome
- grain yieldse0
- Direction
- Maximume0
- Value
- 2,165 kg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum grain yields of 1,376 kg ha-1 and 2,165 kg ha-1 were obtained at doses of 118 kg P2O5 ha-1 and 0.9 kg zinc ha-1 for ‘BRS Guariba’, and 120 kg P2O5 ha-1 and 3.1 kg zinc ha-1 for ‘BRS Aracê’, respectively”
t0“COWPEA”
Claim · model-written summary
The yield component of greatest influence on grain yield was pods per plant, averaging 6 in BRS Guariba.
- Taxon
- COWPEAVigna unguiculatat0
- Material
- BRS Guaribae0
- Outcome
- number of pods per plante0
- Value
- 6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production component of greatest influence on grain yield was the number of pods per plant, with average values of 6 and 10 for ‘BRS Guariba’ and ‘BRS Aracê’ cultivars, respectively”
t0“COWPEA”
Claim · model-written summary
The yield component of greatest influence on grain yield was pods per plant, averaging 10 in BRS Aracê.
- Taxon
- COWPEAVigna unguiculatat0
- Material
- BRS Aracêe0
- Outcome
- number of pods per plante0
- Value
- 10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production component of greatest influence on grain yield was the number of pods per plant, with average values of 6 and 10 for ‘BRS Guariba’ and ‘BRS Aracê’ cultivars, respectively”
t0“COWPEA”
Claim · model-written summary
The mean correlation coefficient was 0.82 (p < 0.01).
- Taxon
- COWPEAVigna unguiculatat0
- Outcome
- mean correlation coefficiente0
- Value
- 0.82e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean correlation coefficient was 0.82 (p < 0.01)”
t0“COWPEA”
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zinc atom · yield · Vigna unguiculata (cowpea)Results agree
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- no effect
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See all 113 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.