Abstract
Abstract Using phosphate fertilizer (particularly at high levels) to improve the phosphorus (P) level of soils during the cultivation of legumes and other cereals unfortunately has negative effect on the levels of micronutrients like zinc (Zn) in grains. This study evaluated the influence of P and nitrogen (N) fertilization on iron (Fe) and Zn levels of cowpea grains. Cowpea genotypes B301, TV u 16514, IT 90K‐205‐8, UAM 09‐1046‐6‐1 and TV u 1272 were grown in greenhouse pots containing barren soils (to simulate micronutrient‐deficient soils) in two stages of varied P (0, 20, 40, and 60 kg P ha −1 ) with and without N (i.e. P only and P v N). The effect of these interactions on Fe and Zn levels were measured. Application of P alone showed no significant ( p > 0.05) negative influence on Zn and Fe content of the grains. However, a combination of N and P fertilization reduced Zn content significantly at 60P ( p < 0.05). Further evaluation showed TV u 1272 as highest in terms of Fe and Zn at all P levels. Significant reduction of grain Zn was found at 60P on N and P interaction. No such negative correlation was observed for Fe. TV u 1272 (a high‐yielding genotype) is recommended as a source of high micronutrient.
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Claims 5
Claim · model-written summary
Application of P alone had no significant negative influence on grain Zn and Fe content of cowpea
- Taxon
- Vigna unguiculata
Vigna unguiculatat0 - Treatment
- Application of P alonee1
- Outcome
- Zn and Fe content of the grainse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna unguiculata”
e1“Application of P alone showed no significant ( p > 0.05) negative influence on Zn and Fe content of the grains”
Claim · model-written summary
Combined N and P fertilization reduced grain Zn content significantly at 60P
- Taxon
- Vigna unguiculataVigna unguiculatat0
- Treatment
- a combination of N and P fertilizatione2
- Outcome
- Zn contente2
- Direction
- reducede2
- Qualifier
- at 60Pe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna unguiculata”
e2“a combination of N and P fertilization reduced Zn content significantly at 60P ( p < 0.05)”
Claim · model-written summary
Genotype TV u 1272 had the highest Fe and Zn content at all P levels
- Taxon
- Vigna unguiculataVigna unguiculatat0
- Material
- TV u 1272e3
- Outcome
- Fe and Zne3
- Direction
- higheste3
- Qualifier
- at all P levelse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna unguiculata”
e3“Further evaluation showed TV u 1272 as highest in terms of Fe and Zn at all P levels”
Claim · model-written summary
No negative correlation between the N and P interaction and grain Fe was observed
- Taxon
- Vigna unguiculataVigna unguiculatat0
- Treatment
- N and P interactione4
- Outcome
- Fee4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna unguiculata”
e4“Significant reduction of grain Zn was found at 60P on N and P interaction. No such negative correlation was observed for Fe”
Claim · model-written summary
TV u 1272 is recommended as a source of high micronutrient
- Taxon
- Vigna unguiculataVigna unguiculatat0
- Material
- TV u 1272e5
- Outcome
- source of high micronutriente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna unguiculata”
e5“TV u 1272 (a high‐yielding genotype) is recommended as a source of high micronutrient”
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