Abstract
Summary Groundnut plants can obtain N from N 2 fixation via symbiosis with rhizobia, and inoculation with selected strains can improve grain yields. We report the results of four field experiments carried out under subtropical conditions to confirm whether microbial inoculants can improve groundnut performance through the effects of single inoculation with Bradyrhizobium arachidis (SEMIA6144), coinoculation with Arthrospira platensis (IPR7059) or Synechocystis sp. (IPR7061), or N fertilization with 100 kg ha -1 N on plant growth, nodulation, N accumulation in tissues, grain protein concentration (GPC), and grain yield. There were no effects of inoculation treatment or N fertilizer on shoot or root dry weight. In clayey soil, coinoculation with B. arachidis and cyanobacteria increased grain productivity by an average of 19% compared to that in the noninoculated control. In this clayey soil with a higher P content, regardless of whether coinoculated with B. arachidis or cyanobacteria or single inoculated, grain productivity was 16% greater on average than that resulting from N fertilizer addition. In conclusion, the success of rhizobial inoculation in groundnuts is dependent on the soil, probably due to P limitation and weather conditions.
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Claims 5
Claim · model-written summary
Inoculation and nitrogen fertilizer did not affect shoot dry weight.
- Taxon
- groundnut
Arachis hypogaeat0 - Treatment
- inoculation treatment or N fertilizere0
- Outcome
- shoot or root dry weighte0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“groundnut”
e0“There were no effects of inoculation treatment or N fertilizer on shoot or root dry weight”
Claim · model-written summary
Inoculation and nitrogen fertilizer did not affect root dry weight.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- inoculation treatment or N fertilizere0
- Outcome
- root dry weighte0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“groundnut”
e0“There were no effects of inoculation treatment or N fertilizer on shoot or root dry weight”
Claim · model-written summary
Bradyrhizobium and cyanobacteria coinoculation increased grain productivity by 19% versus uninoculated control in clayey soil.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- coinoculation with B. arachidis and cyanobacteriae0
- Interactor
- B. arachidisBradyrhizobium arachidise0symbiont
- Second interactor
- cyanobacteriaCyanobacteriotae0symbiont
- Outcome
- grain productivitye0
- Direction
- increasede0
- Value
- 19%e0
- Comparator
- noninoculated controle0
- Setting
- clayey soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“groundnut”
e0“In clayey soil, coinoculation with B. arachidis and cyanobacteria increased grain productivity by an average of 19% compared to that in the noninoculated control”
Claim · model-written summary
Inoculation produced 16% greater grain productivity than nitrogen fertilizer in clayey soil.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- coinoculated with B. arachidis or cyanobacteria or single inoculatede0
- Interactor
- B. arachidisBradyrhizobium arachidise0symbiont
- Second interactor
- cyanobacteriaCyanobacteriotae0symbiont
- Outcome
- grain productivitye0
- Direction
- greatere0
- Value
- 16%e0
- Comparator
- N fertilizer additione0
- Setting
- clayey soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“groundnut”
e0“In this clayey soil with a higher P content, regardless of whether coinoculated with B. arachidis or cyanobacteria or single inoculated, grain productivity was 16% greater on average than that resulting from N fertilizer addition”
Claim · model-written summary
The authors concluded that rhizobial inoculation success depends on soil, possibly phosphorus and weather.
- Taxon
- groundnutArachis hypogaeat0
- Outcome
- success of rhizobial inoculation in groundnutse0
- Qualifier
- probably due to P limitation and weather conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“groundnut”
e0“the success of rhizobial inoculation in groundnuts is dependent on the soil, probably due to P limitation and weather conditions”
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