Abstract
The aim of this study was to evaluate the effectiveness of a mixed biofertilizer with phosphate and potash rocks (PK biofertilizer) combined with an earthworm compound inoculated with free living diazotrophic bacteria and Cunninghamella elegans, fungi that produces chitosan, on cowpea nodulation, biomass yield and nutrient uptake.The effects of some chemical attributes from an acidic soil of the Brazilian Northeast were also studied.The treatments were as follows: a) biofertilizer enriched in N by free living diazotrophic bacteria(NPKB), applying crustaceous chitosan (ChCru) at a rate 2 mg mL -1 ; b) NPKB and ChCru at a rate 4 mg mL -1 ; c) NPKB and ChCru at a rate 6 mg mL -1 ; d) NPKB and fungi chitosan (ChFu, 2 mg mL -1 ); e) NPKB+C.elegans (NPKP); f) NPKB without chitosan; g) mineral fertilizers (NPKF); and h) control without NPK fertilizer and chitosan.Biofertilizer treatments increased cowpea nodules biomass, shoot biomass, and total N, P, and K in the shoots.The largest increase was obtained with ChCru, and the highest rate was obtained with NPKP.Furthermore, biofertilizers reduced soil pH and increased the total N and available P and K.These results reveal the potential of rock biofertilizer mixed with earthworm compound inoculated with free living diazotrophic bacteria and C. elegans (fungi chitosan) for plant production and nutrient uptake.The biofertilizer may be an alternative for NPK fertilization that slows the release of nutrients, favoring longterm soil fertility.
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Claims 8
Claim · model-written summary
Biofertilizers increased cowpea nodule biomass.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- Biofertilizer treatmentse0
- Outcome
- cowpea nodules biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biofertilizer treatments increased cowpea nodules biomass”
Claim · model-written summary
Biofertilizers increased cowpea shoot biomass.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Biofertilizer treatmentse0
- Outcome
- shoot biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biofertilizer treatments increased cowpea nodules biomass, shoot biomass”
t0“on cowpea nodulation”
Claim · model-written summary
Biofertilizers increased total nitrogen, phosphorus and potassium in cowpea shoots.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Biofertilizer treatmentse0
- Outcome
- total N, P, and K in the shootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biofertilizer treatments increased cowpea nodules biomass, shoot biomass, and total N, P, and K in the shoots”
Claim · model-written summary
ChCru produced the largest increase among treatments.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- ChCrue0
- Outcome
- largest increasee0
- Direction
- largest increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The largest increase was obtained with ChCru”
t0“on cowpea nodulation”
Claim · model-written summary
NPKP yielded the highest rate among treatments.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- NPKPe0
- Outcome
- highest ratee0
- Direction
- highest ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest rate was obtained with NPKP”
t0“on cowpea nodulation”
Claim · model-written summary
Biofertilizers reduced soil pH.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- biofertilizerse0
- Outcome
- soil pHe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biofertilizers reduced soil pH”
t0“on cowpea nodulation”
Claim · model-written summary
Biofertilizers increased total soil N and available P and K.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- biofertilizerse0
- Outcome
- total N and available P and Ke0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biofertilizers reduced soil pH and increased the total N and available P and K”
t0“on cowpea nodulation”
Claim · model-written summary
The authors suggest the biofertilizer as an alternative to NPK fertilization for slower nutrient release and lasting soil fertility.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- alternative for NPK fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biofertilizer may be an alternative for NPK fertilization that slows the release of nutrients, favoring longterm soil fertility.”
t0“on cowpea nodulation”
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