Abstract
A screenhouse and field experiment was carried out at Obafemi Awolowo University, Ile-Ife, in 2016 to investigate the effect of Plant Growth Promoting Rhizobacteria (PGPR) on cowpea (Vigna unguiculata) using biochar as a carrier. This was to evaluate the suitability of PGPR as fertilizers, pesticides as well as soil fertility improvement. The experimental design was a randomized complete block design with six treatments, replicated six times. Treatments used were Control, 40 ml biofertilizer (Bacillus thuringiensis, Pseudomonas putida and Klebsiella variicola), biofertilizer (40 ml) + biochar (40 g), biochar (40 g), 60 KgP2O5/ha Single Super Phosphate SSP and 2.5% of Lambda Cyhalothrin (Laraforce insecticide). Agronomic data were recorded and post-harvest soil analyses were carried out. The nodulation and plant heights of cowpea plants increased with the application of biofertilizer + biochar and showed about 13% and 53% increase in plant height and number of leaves respectively, over the control for the field experiment. Biofertilizer + biochar showed just about 2% decrease in the number of pods when compared with SSP which recorded the highest number. Biofertilizer + biochar treated soils recorded high microbial respiration with about 41% increase over control soils. Biochar application significantly increased the soil exchangeable K and Mg while the application of biofertilizer alone had a significant effect on Ca and the soil organic matter. The results suggest that PGPR as a potential alternative for chemical fertilizers and pesticides in cowpea production and its combination with biochar is a good technology to be adopted for soil fertility improvement.
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Claims 7
Claim · model-written summary
Biofertilizer plus biochar increased cowpea nodulation.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- biofertilizer + biochare0
- Outcome
- nodulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nodulation and plant heights of cowpea plants increased with the application of biofertilizer + biochar”
Claim · model-written summary
Biofertilizer plus biochar increased cowpea plant height by about 13% versus control in the field.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- biofertilizer + biochare0
- Outcome
- plant heighte0
- Direction
- increasee0
- Value
- 13%e0
- Comparator
- controle0
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nodulation and plant heights of cowpea plants increased with the application of biofertilizer + biochar and showed about 13% and 53% increase in plant height and number of leaves respectively, over the control for the field experiment.”
Claim · model-written summary
Biofertilizer plus biochar increased cowpea leaf number by about 53% versus control in the field.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- biofertilizer + biochare0
- Outcome
- number of leavese0
- Direction
- increasee0
- Value
- 53%e0
- Comparator
- controle0
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biofertilizer + biochar and showed about 13% and 53% increase in plant height and number of leaves respectively, over the control for the field experiment.”
t0“PERFORMANCE OF COWPEA (Vigna unguiculata (L.)Walp)”
Claim · model-written summary
Biofertilizer plus biochar produced about 2% fewer pods than SSP.
- Taxon
- COWPEAVigna unguiculatat0
- Treatment
- Biofertilizer + biochare0
- Outcome
- number of podse0
- Direction
- decreasee0
- Value
- 2%e0
- Comparator
- SSPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biofertilizer + biochar showed just about 2% decrease in the number of pods when compared with SSP which recorded the highest number.”
t0“PERFORMANCE OF COWPEA (Vigna unguiculata (L.)Walp)”
Claim · model-written summary
Biofertilizer plus biochar raised soil microbial respiration about 41% over control.
- Taxon
- COWPEAVigna unguiculatat0
- Treatment
- Biofertilizer + biochare0
- Outcome
- microbial respiratione0
- Direction
- increasee0
- Value
- 41%e0
- Comparator
- control soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biofertilizer + biochar treated soils recorded high microbial respiration with about 41% increase over control soils.”
t0“PERFORMANCE OF COWPEA (Vigna unguiculata (L.)Walp)”
Claim · model-written summary
Biochar significantly increased soil exchangeable K and Mg.
- Taxon
- COWPEAVigna unguiculatat0
- Treatment
- Biochar applicatione0
- Outcome
- soil exchangeable K and Mge0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biochar application significantly increased the soil exchangeable K and Mg”
t0“PERFORMANCE OF COWPEA (Vigna unguiculata (L.)Walp)”
Claim · model-written summary
Biofertilizer alone significantly affected soil Ca and organic matter.
- Taxon
- COWPEAVigna unguiculatat0
- Treatment
- application of biofertilizer alonee0
- Outcome
- Ca and the soil organic mattere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of biofertilizer alone had a significant effect on Ca and the soil organic matter.”
t0“PERFORMANCE OF COWPEA (Vigna unguiculata (L.)Walp)”
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See all 7 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.