Abstract
Abstract External and internal phosphorus (P) requirements of hybrid maize (FHY-396) and indigenous variety (EV-7004) were compared on a Typic Calciargid soil. A sorption isotherm was constructed by equilibrating 2.5 g soil with 25 mL of a 0.01 M calcium chloride (CaCl2) solution containing 2, 3, 6, 12, 25, 50, and 100 mg P L–1. Sorption data were fitted to a modified Freundlich equation [x/m = Kf(EPC)1/n] to compute P rates (0, 30, 60, and 120 mg kg–1 soil) against solution levels (0, 0.09, 0.26, and 0.76 mg P L–1) for a pot study. Applied P significantly increased shoot dry matter, P concentration, and P uptake in both the genotypes. For optimum shoot growth, internal P requirement of hybrid (2.51 mg g–1) was 5% more than variety (2.39 mg g–1). However, external P requirement of hybrid (0.50 mg L–1) was remarkably more than variety (0.19 mg L–1). This strongly advocated greater P rates for the high-yielding hybrid than for the variety. Keywords: Calcareous soilexternal P requirementFreundlich modelinternal P requirementmaize genotypesP sorption
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Claims 6
Claim · model-written summary
Applied P significantly increased shoot dry matter in both maize genotypes.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Genotypes”
e0“Applied P significantly increased shoot dry matter, P concentration, and P uptake in both the genotypes.”
Claim · model-written summary
Applied P significantly increased P concentration in both maize genotypes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Genotypes”
e0“Applied P significantly increased shoot dry matter, P concentration, and P uptake in both the genotypes.”
Claim · model-written summary
Applied P significantly increased P uptake in both maize genotypes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Genotypes”
e0“Applied P significantly increased shoot dry matter, P concentration, and P uptake in both the genotypes.”
Claim · model-written summary
The hybrid required 2.51 mg g–1 internal P for optimum shoot growth, 5% more than the variety.
- Material
- FHY-396e1
- Outcome
- internal P requiremente0
- Direction
- moree0
- Value
- 2.51 mg g–1e0
- Qualifier
- 5%e0
- Comparator
- varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Genotypes”
e0“For optimum shoot growth, internal P requirement of hybrid (2.51 mg g–1) was 5% more than variety (2.39 mg g–1).”
e1“hybrid maize (FHY-396) and indigenous variety (EV-7004)”
Claim · model-written summary
The hybrid required 0.50 mg L–1 external P, more than the variety.
- Material
- FHY-396e1
- Outcome
- external P requiremente0
- Direction
- moree0
- Value
- 0.50 mg L–1e0
- Comparator
- varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Genotypes”
e0“However, external P requirement of hybrid (0.50 mg L–1) was remarkably more than variety (0.19 mg L–1).”
e1“hybrid maize (FHY-396) and indigenous variety (EV-7004)”
Claim · model-written summary
The authors advocated greater P application rates for the high-yielding hybrid than the variety.
- Outcome
- greater P rates for the high-yielding hybrid than for the varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Maize Genotypes”
e0“This strongly advocated greater P rates for the high-yielding hybrid than for the variety.”
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See all 306 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.