Abstract
The effects of calcium hydrogen phosphate on lead (Pb) uptake by cowpea (Vigna unguiculata) were investigated in a growth chamber experiment coupled with atomic absorption spectrophotometry (AAS) and colorimetry analyses. Cowpea seeds were planted and harvested in soil samples treated with Pb+2 added as lead nitrate at the rates of 0, 1000 and 3000 mg/kg followed by calcium hydrogen phosphate (CaHPO4) at 0, 10, 50 and 250 mg/kg. Increases in shoot yield brought about by phosphate fertilization were observed to oppress the shoot lead concentration as a result of growth dilution, where the actual amount of lead in shoots was unaffected by phosphate treatment. This work revealed that there is no substantial effect on lead uptake by cowpea, as a result of phosphate fertilization. Therefore, phosphate fertilization is a good means of cowpea production with minimal lead uptake and hence safe for human consumption
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Claims 5
Claim · model-written summary
Phosphate fertilization increased cowpea shoot yield.
- Taxon
- cowpea (Vigna unguiculata)
Vigna unguiculatae0 - Treatment
- phosphate fertilizatione1
- Outcome
- shoot yielde1
- Direction
- Increasese1
- Setting
- growth chambere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of calcium hydrogen phosphate on lead (Pb) uptake by cowpea (Vigna unguiculata) were investigated in a growth chamber experiment”
e1“Increases in shoot yield brought about by phosphate fertilization were observed to oppress the shoot lead concentration as a result of growth dilution, where the actual amount of lead in shoots was unaffected by phosphate treatment”
Claim · model-written summary
Phosphate fertilization lowered the shoot lead concentration of cowpea through growth dilution.
- Taxon
- cowpea (Vigna unguiculata)Vigna unguiculatae0
- Treatment
- phosphate fertilizatione1
- Outcome
- shoot lead concentratione1
- Direction
- oppresse1
- Qualifier
- as a result of growth dilutione1
- Setting
- growth chambere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of calcium hydrogen phosphate on lead (Pb) uptake by cowpea (Vigna unguiculata) were investigated in a growth chamber experiment”
e1“Increases in shoot yield brought about by phosphate fertilization were observed to oppress the shoot lead concentration as a result of growth dilution, where the actual amount of lead in shoots was unaffected by phosphate treatment”
Claim · model-written summary
Phosphate treatment left the actual amount of lead in cowpea shoots unaffected.
- Taxon
- cowpea (Vigna unguiculata)Vigna unguiculatae0
- Treatment
- phosphate treatmente1
- Outcome
- actual amount of lead in shootse1
- Direction
- unaffectede1
- Setting
- growth chambere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of calcium hydrogen phosphate on lead (Pb) uptake by cowpea (Vigna unguiculata) were investigated in a growth chamber experiment”
e1“Increases in shoot yield brought about by phosphate fertilization were observed to oppress the shoot lead concentration as a result of growth dilution, where the actual amount of lead in shoots was unaffected by phosphate treatment”
Claim · model-written summary
Phosphate fertilization had no substantial effect on lead uptake by cowpea.
- Taxon
- cowpea (Vigna unguiculata)Vigna unguiculatae0
- Treatment
- phosphate fertilizatione2
- Outcome
- lead uptakee2
- Direction
- no substantial effecte2
- Setting
- growth chambere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of calcium hydrogen phosphate on lead (Pb) uptake by cowpea (Vigna unguiculata) were investigated in a growth chamber experiment”
e2“This work revealed that there is no substantial effect on lead uptake by cowpea, as a result of phosphate fertilization”
Claim · model-written summary
Phosphate fertilization is a good means of cowpea production with minimal lead uptake.
- Taxon
- cowpeaVigna unguiculatae3
- Treatment
- phosphate fertilizatione3
- Outcome
- minimal lead uptakee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Therefore, phosphate fertilization is a good means of cowpea production with minimal lead uptake and hence safe for human consumption”
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