Abstract
Abstract The use of plant growth–promoting rhizobacteria (PGPR) associated with rhizobia may improve biological N fixation, nutrient acquisition, and grain yield of the peanut ( Arachis hypogaea L.). However, few studies have reported the effect of inoculation of rhizobia and PGPR in association with Mo in tropical soil conditions. This study examined the effectiveness of (co)inoculation with Bradyrhizobium spp. and/or Azospirillum brasilense and Mo application in improving the yield response of creeping peanut crop (‘RUNNER IAC 886’). The effects of rhizobacteria and Mo on nodulation, crop growth, chlorophyll content, and yield of peanut were investigated in a moderately acidic sandy soil (pH 5.0) from the Brazilian Cerrado during the 2016–2017 and 2017–2018 growing seasons. Four seed inoculation treatments (control [uninoculated seeds], inoculation with Bradyrhizobium spp. strains SEMIA 5079 and SEMIA 5080, inoculation with Azospirillum brasilense strains Ab‐V5 and Ab‐V6, and co‐inoculation of Bradyrhizobium spp. and Azospirillum brasilense ) and two Mo levels (0 and 200 mg Mo kg −1 of seed) were studied. Results showed that the effects of the interaction between rhizobacteria and Mo application were not significant ( p > .05) for all crop traits. Root nodulation, dry matter accumulation, and chlorophyll content were significantly greater in Mo‐treated peanut plants than control plants in both seasons. However, the response of crop grain yield was significantly greater (17.7%) in Mo‐treated plants only in the 2017–2018 season. Therefore, the improved root nodulation, crop growth, and chlorophyll content resulting from Mo application can lead to increased pod and grain yield in peanut. Inoculation with Bradyrhizobium spp. alone or combined with A. brasilense enhanced root nodulation, chlorophyll content, and peanut grain yield. Over two harvests, average peanut grain yield increased by 25.3 and 24.0% with inoculation of Bradyrhizobium spp. alone and combined with A. brasilense , respectively, compared with noninoculated plants. Due to lower cost and higher profitability, inoculation of Bradyrhizobium spp. alone is the most efficient practice for peanut cropping in sandy soils of the Brazilian Cerrado. Together with Mo application, these agricultural practices can be recommended for Brazilian peanut farmers.
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Claims 9
Claim · model-written summary
The rhizobacteria by molybdenum interaction was not significant for crop traits.
- Taxon
- peanut
Arachis hypogaeae1 - Treatment
- rhizobacteria and Mo applicatione0
- Outcome
- all crop traitse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of the interaction between rhizobacteria and Mo application were not significant ( p > .05) for all crop traits”
e1“yield of peanut”
Claim · model-written summary
Molybdenum increased root nodulation, dry matter accumulation, and chlorophyll content in both seasons.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- Mo‐treatede0
- Outcome
- Root nodulation, dry matter accumulation, and chlorophyll contente0
- Direction
- greatere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root nodulation, dry matter accumulation, and chlorophyll content were significantly greater in Mo‐treated peanut plants than control plants in both seasons”
Claim · model-written summary
Molybdenum increased peanut grain yield by 17.7% only in 2017–2018.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- Mo‐treatede0
- Outcome
- crop grain yielde0
- Direction
- greatere0
- Value
- 17.7%e0
- Qualifier
- only in the 2017–2018 seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the response of crop grain yield was significantly greater (17.7%) in Mo‐treated plants only in the 2017–2018 season”
e1“yield of peanut”
Claim · model-written summary
Bradyrhizobium inoculation alone enhanced nodulation, chlorophyll content, and grain yield.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- Inoculation with Bradyrhizobium spp. alonee0
- Interactor
- Bradyrhizobium spp.
Bradyrhizobiume0symbiont - Outcome
- root nodulation, chlorophyll content, and peanut grain yielde0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with Bradyrhizobium spp. alone or combined with A. brasilense enhanced root nodulation, chlorophyll content, and peanut grain yield”
Claim · model-written summary
Bradyrhizobium with A. brasilense enhanced nodulation, chlorophyll content, and grain yield.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- combined with A. brasilensee0
- Interactor
- Bradyrhizobium spp.Bradyrhizobiume0symbiont
- Second interactor
- A. brasilense
Azospirillum brasilensee0symbiont - Outcome
- root nodulation, chlorophyll content, and peanut grain yielde0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with Bradyrhizobium spp. alone or combined with A. brasilense enhanced root nodulation, chlorophyll content, and peanut grain yield”
Claim · model-written summary
Bradyrhizobium alone increased average grain yield 25.3% over uninoculated plants.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- inoculation of Bradyrhizobium spp. alonee0
- Interactor
- Bradyrhizobium spp.Bradyrhizobiume0symbiont
- Outcome
- average peanut grain yielde0
- Direction
- increasede0
- Value
- 25.3e0
- Comparator
- noninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average peanut grain yield increased by 25.3 and 24.0% with inoculation of Bradyrhizobium spp. alone and combined with A. brasilense , respectively, compared with noninoculated plants”
Claim · model-written summary
Bradyrhizobium and A. brasilense co-inoculation increased average grain yield 24.0% over uninoculated plants.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- combined with A. brasilensee0
- Interactor
- Bradyrhizobium spp.Bradyrhizobiume0symbiont
- Second interactor
- A. brasilenseAzospirillum brasilensee0symbiont
- Outcome
- average peanut grain yielde0
- Direction
- increasede0
- Value
- 24.0%e0
- Comparator
- noninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average peanut grain yield increased by 25.3 and 24.0% with inoculation of Bradyrhizobium spp. alone and combined with A. brasilense , respectively, compared with noninoculated plants”
Claim · model-written summary
Bradyrhizobium alone was judged most efficient for sandy-soil peanut cropping because of cost and profitability.
- Taxon
- peanutArachis hypogaeae0
- Interactor
- Bradyrhizobium spp.Bradyrhizobiume0symbiont
- Outcome
- inoculation of Bradyrhizobium spp. alone is the most efficient practicee0
- Setting
- Brazilian Cerradoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Due to lower cost and higher profitability, inoculation of Bradyrhizobium spp. alone is the most efficient practice for peanut cropping in sandy soils of the Brazilian Cerrado”
Claim · model-written summary
The authors recommend Bradyrhizobium inoculation together with molybdenum for Brazilian peanut farmers.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- Mo applicatione0
- Interactor
- Bradyrhizobium spp.Bradyrhizobiume1symbiont
- Outcome
- these agricultural practices can be recommendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Together with Mo application, these agricultural practices can be recommended for Brazilian peanut farmers”
e1“inoculation of Bradyrhizobium spp. alone is the most efficient practice for peanut cropping”
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See all 221 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.