Abstract
3 Abstract: In Brazil, many factors affect cowpea yield, such as soils low fertility, especially phosphorous. Allied to that, the efficiency in the use of phosphorous fertilization is very low due to the large fixation of this element in clay soils. An experiment was carried out to assess the effects of phosphorus fertilization on the nutrition and yield of cowpea (Vigna unguiculata (L.) Walp), cultivar BR 17 Gurgeia grown in an arenosols. Treatments considered of five levels of phosphorus: 0, 50, 100, 150, 200 and 300 kg ha of P O arranged in a 1 25 randomized complete block design with five replicates. The effects of these treatments were evaluated by measuring P (resin) content in the soil, macro and micronutrients leaf contents, yield and seed content. P rates increased P level in the soil, leaves and in grain yield but decreased foliar concentrations of zinc. The maximum yield was of 1,319 kg ha achieved with 168 kg ha of P O. Generally, rates of phosphorus increases the 11 25 rendering of cowpea grain, but with a reduction in levels of foliar zinc.
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Claims 5
Claim · model-written summary
Phosphorus rates increased soil phosphorus level.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- P ratese0
- Outcome
- P level in the soile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P rates increased P level in the soil, leaves and in grain yield but decreased foliar concentrations of zinc”
t0“cowpea”
Claim · model-written summary
Phosphorus rates increased leaf phosphorus level in cowpea.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- P ratese0
- Outcome
- P level in the soil, leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P rates increased P level in the soil, leaves and in grain yield but decreased foliar concentrations of zinc”
t0“cowpea”
Claim · model-written summary
Phosphorus rates increased cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- P ratese0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P rates increased P level in the soil, leaves and in grain yield but decreased foliar concentrations of zinc”
t0“cowpea”
Claim · model-written summary
Phosphorus rates decreased foliar zinc concentration in cowpea.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- P ratese0
- Outcome
- foliar concentrations of zince0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P rates increased P level in the soil, leaves and in grain yield but decreased foliar concentrations of zinc”
t0“cowpea”
Claim · model-written summary
Maximum cowpea yield was 1,319 kg ha at the stated phosphorus rate.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 168 kg ha of P Oe0
- Outcome
- maximum yielde0
- Direction
- maximume0
- Value
- 1,319 kg hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum yield was of 1,319 kg ha achieved with 168 kg ha of P O”
t0“cowpea”
The same questions in other papers
phosphorus · yield · Vigna unguiculata (cowpea)Results differ
106 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
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19 papers in the same direction as this paper · 6 in the opposite direction
- no effect
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See all 26 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.