Abstract
The differential ability of genotypes of soybean (Glycine max) and cowpea (Vigna unguiculata) to thrive under low-phosphorus (P) conditions by utilising P from sources with low solubility was assessed in a greenhouse study with a low-P savanna soil collected from a research field in Fashola, south-western Nigeria. The P sources added (21 mg P kg-1soil) were calcium phosphate (Ca-P), iron phosphate (Fe-P), aluminium phosphate (Al-P), and triple superphosphate (TSP). Soil without P addition served as a control. The soybean genotypes were TGm 1039, TGm 1196, TGm 1293, TGm 1360, TGm 1420, TGm 1511, and TGm 1540. The cowpea genotypes were Dan-ila, IT89KD-349, IT89KD-391, IT90K-59, and IT82D-716. Nearly all the soybean genotypes significantly increased their shoot dry matter yield (DMY) and accumulation of P from the various sources when compared with the control; the ranking for P acquisition was control<Al-P<Fe-P<Ca-P=TSP. The shoot DMY and shoot P accumulation of most of the cowpea genotypes were also significantly increased by the addition of Ca-P, Fe-P, and TSP; the addition of Al-P had no significant effect. The cowpea genotypes varied widely in acquiring P from the P sources. However, the general ranking was control=Al-P<Fe-P<Ca-P=TSP. For both crop species, the shoot DM yields under Ca-P and TSP treatments were not significantly different. From the analysis of shoot P accumulation with the Additive Main Effects and Multiplicative Interaction (AMMI) model, the cowpea genotype IT89KD-391 was better than other genotypes with Ca-P as P source; genotype IT90K-59 was better when Fe-P was the P source. In contrast, most of the soybean genotypes appeared to have access to the P sources in a similar manner.
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Claims 11
Claim · model-written summary
Nearly all soybean genotypes had significantly higher shoot dry matter yield and P accumulation with added P than controls.
- Taxon
- soybean
Glycine maxe0 - Treatment
- various sourcese0
- Outcome
- shoot dry matter yield (DMY) and accumulation of Pe0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nearly all the soybean genotypes significantly increased their shoot dry matter yield (DMY) and accumulation of P from the various sources when compared with the control”
Claim · model-written summary
Soybean P acquisition ranked control, Al-P, Fe-P, then Ca-P and TSP jointly.
- Taxon
- soybeanGlycine maxe1
- Outcome
- P acquisitione0
- Qualifier
- control<Al-P<Fe-P<Ca-P=TSPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ranking for P acquisition was control<Al-P<Fe-P<Ca-P=TSP”
e1“Nearly all the soybean genotypes significantly increased”
Claim · model-written summary
Ca-P, Fe-P and TSP significantly increased shoot dry matter yield and P accumulation in most cowpea genotypes.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- addition of Ca-P, Fe-P, and TSPe0
- Outcome
- shoot DMY and shoot P accumulatione0
- Direction
- increasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot DMY and shoot P accumulation of most of the cowpea genotypes were also significantly increased by the addition of Ca-P, Fe-P, and TSP”
e1“Soil without P addition served as a control.”
Claim · model-written summary
Al-P addition did not significantly affect cowpea shoot yield and P accumulation.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- addition of Al-Pe0
- Outcome
- shoot DMY and shoot P accumulatione1
- Direction
- no significant effecte0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“addition of Al-P had no significant effect”
e1“shoot DMY and shoot P accumulation of most of the cowpea genotypes”
e2“Soil without P addition served as a control.”
Claim · model-written summary
Cowpea genotypes varied widely in P acquisition.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- acquiring P from the P sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea genotypes varied widely in acquiring P from the P sources”
Claim · model-written summary
Cowpea P acquisition ranked control and Al-P jointly below Fe-P, then Ca-P and TSP jointly.
- Taxon
- cowpeaVigna unguiculatae1
- Outcome
- acquiring P from the P sourcese1
- Qualifier
- control=Al-P<Fe-P<Ca-P=TSPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“general ranking was control=Al-P<Fe-P<Ca-P=TSP”
e1“cowpea genotypes varied widely in acquiring P from the P sources”
Claim · model-written summary
Soybean shoot dry matter yields under Ca-P and TSP did not differ significantly.
- Taxon
- soybeanGlycine maxt0
- Outcome
- shoot DM yieldse0
- Comparator
- Ca-P and TSP treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both crop species, the shoot DM yields under Ca-P and TSP treatments were not significantly different”
t0“soybean”
Claim · model-written summary
Cowpea shoot dry matter yields under Ca-P and TSP did not differ significantly.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- shoot DM yieldse0
- Comparator
- Ca-P and TSP treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both crop species, the shoot DM yields under Ca-P and TSP treatments were not significantly different”
t0“cowpea”
Claim · model-written summary
Cowpea IT89KD-391 accumulated P better than other genotypes with Ca-P.
- Taxon
- cowpeaVigna unguiculatae0
- Material
- IT89KD-391e0
- Treatment
- Ca-Pe0
- Outcome
- shoot P accumulatione1
- Direction
- bettere0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea genotype IT89KD-391 was better than other genotypes with Ca-P as P source”
e1“From the analysis of shoot P accumulation”
Claim · model-written summary
Cowpea IT90K-59 accumulated P better than other genotypes with Fe-P.
- Taxon
- cowpeaVigna unguiculatae1
- Material
- IT90K-59e0
- Treatment
- Fe-Pe0
- Outcome
- shoot P accumulatione2
- Direction
- bettere0
- Comparator
- other genotypese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotype IT90K-59 was better when Fe-P was the P source”
e1“cowpea genotype IT89KD-391 was better than other genotypes with Ca-P as P source; genotype IT90K-59 was better when Fe-P was the P source”
e2“From the analysis of shoot P accumulation”
Claim · model-written summary
Most soybean genotypes appeared to access the P sources similarly.
- Taxon
- soybeanGlycine maxe0
- Outcome
- access to the P sources in a similar mannere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of the soybean genotypes appeared to have access to the P sources in a similar manner”
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106 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
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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.