Abstract
Biofertilisers produced with phosphate rock (PR) plus sulphur (S) inoculated with Acidithiobacillus can promote plant growth and increase available P in tropical soils. Pot and field experiments were carried out in a Brazilian tableland soil with low available P to evaluate the suitability of P biofertiliser at different levels as an alternative to soluble P fertiliser for cowpea, with and without rhizobial inoculation. In the pot experiment, P treatments were: PR — 800 kg/ha; PR plus S (S:PR = 100g/kg) — 800 kg/ha; biofertiliser (B) [phosphate rock treated with sulphur (S:PR = 100g/kg) plus Acidithiobacillus] — 200, 400, 600 and 800 kg/ha; and triple superphosphate (TSP) — 400 kg/ha. In the field experiment, P treatments were: PR — 800 kg/ha; biofertiliser — 300, 600 and 900 kg/ha; and triple superphosphate (TSP) — 400 kg/ha. A treatment without added P, S or Acidithiobacillus (P 0 ) was added as the control in both experiments. Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied. The best values for soil available P were obtained with application of P biofertiliser, especially with higher levels. Uninoculated cowpea nodulated with native rhizobia present in the tableland soil, although rhizobial strains selected for acid soils were more effective on inoculated plants. In pot experiments, rhizobial inoculation showed interaction with biofertiliser, although no significant differences were observed under field conditions. The results suggest that P biofertiliser may be used as an alternative to triple superphosphate in soils with low available P for fertilising tropical crops and pastures.
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Claims 12
Claim · model-written summary
TSP and biofertiliser increased cowpea nodulation.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- TSP and biofertilisere0
- Outcome
- Nodulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
TSP and biofertiliser increased cowpea dry matter yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- TSP and biofertilisere0
- Outcome
- plant dry matter yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
TSP and biofertiliser increased cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- TSP and biofertilisere0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
TSP and biofertiliser increased cowpea nitrogen and phosphorus uptake.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- TSP and biofertilisere0
- Outcome
- N and P uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
TSP and biofertiliser increased soil pH.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- TSP and biofertilisere0
- Outcome
- soil pHe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
TSP and biofertiliser increased soil available phosphorus.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- TSP and biofertilisere0
- Outcome
- available Pe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation, plant dry matter yield, grain yield, N and P uptake, soil pH and available P increased when TSP and biofertiliser were applied”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Biofertiliser, especially higher levels, gave the best soil available phosphorus values.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- P biofertilisere0
- Outcome
- soil available Pe0
- Direction
- beste0
- Qualifier
- especially with higher levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best values for soil available P were obtained with application of P biofertiliser, especially with higher levels”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Uninoculated cowpea nodulated with native rhizobia in tableland soil.
- Taxon
- cowpeaVigna unguiculatae0
- Interactor
- native rhizobiae0symbiont
- Outcome
- nodulated with native rhizobiae0
- Setting
- tableland soile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uninoculated cowpea nodulated with native rhizobia present in the tableland soil”
Claim · model-written summary
Selected acid soil rhizobia were more effective on inoculated plants.
- Taxon
- cowpeaVigna unguiculatat0
- Interactor
- rhizobial strainse0symbiont
- Outcome
- more effectivee0
- Direction
- more effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rhizobial strains selected for acid soils were more effective on inoculated plants”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Rhizobial inoculation interacted with biofertiliser in pot experiments.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- rhizobial inoculatione0
- Outcome
- interaction with biofertilisere0
- Setting
- pot experimentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pot experiments, rhizobial inoculation showed interaction with biofertiliser”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
Field conditions showed no significant differences for the rhizobial inoculation and biofertiliser interaction.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- rhizobial inoculatione1
- Outcome
- differencese0
- Direction
- no significant differencese0
- Setting
- field conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences were observed under field conditions”
e1“rhizobial inoculation showed interaction with biofertiliser”
t0“cowpea (Vigna unguiculata)”
Claim · model-written summary
The authors suggest P biofertiliser as an alternative to triple superphosphate in low phosphorus soils.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- P biofertiliser may be used as an alternative to triple superphosphatee0
- Qualifier
- soils with low available Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P biofertiliser may be used as an alternative to triple superphosphate in soils with low available P for fertilising tropical crops and pastures”
t0“cowpea (Vigna unguiculata)”
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