Abstract
Microbial biodiversity in soil following different fertilisation regimes and their impact on potato brown rot suppression was studied. Evaluation was made at four naturally infested locations in Egypt. Fields with low components of organic matter (OM) and low carbon nitrogen (C:N) ratio were conducive to the disease caused by Ralstonia solanacearum. Contrary to fields rich in antagonistic actinomycetes and microbial biodiversity. The effect of different regimes on disease control varied from location to another according to difference in edaphic factors. The effect of NPK (nitrogen, phosphorous and potassium) suppression was remarkable as related to increase in eubacteria biodiversity, endospores bacteria and actinomycetes in alkaline soils. Replacement of potassium with magnesium (NPMg) significantly suppressed infection and was associated with soil oligotrophism and antagonistic actinomycetes. Replacement of potassium with calcium (NPCa) significantly suppressed infection, increased fungal biodiversity and antagonistic actinomycetes. Composted chicken manure increased suppression and accompanied with a clear shift in soil biodiversity and increased antagonistic bacteria and fluorescent pseudomonas ratios. Decrease in soil biodiversity was recorded in some cases. Plant animal compost showed disease suppression which accompanied with an increase in microbial biodiversity along with high ratio of antagonistic bacteria. On the other hand, an increase in OM dissociation and reduction in C:N ratio was recorded in one area, characterised with natural high soil OM content, which enhanced soil conduciveness. In conclusion, the recommended fertilisation regime to suppress potato brown rot disease vary from soil to another according to different soil edaphic factors.
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Claims 12
Claim · model-written summary
Fields with low organic matter and low carbon nitrogen ratio were conducive to potato brown rot.
- Taxon
- potato
Solanum tuberosumt0 - Interactor
- Ralstonia solanacearum
Ralstonia solanacearume0pathogen - Outcome
- the disease caused by Ralstonia solanacearume0
- Direction
- conducivee0
- Setting
- Fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fields with low components of organic matter (OM) and low carbon nitrogen (C:N) ratio were conducive to the disease caused by Ralstonia solanacearum.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Disease control by fertilization regimes varied by location and edaphic factors.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- different regimese0
- Outcome
- disease controle0
- Direction
- variede0
- Qualifier
- difference in edaphic factorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of different regimes on disease control varied from location to another according to difference in edaphic factors.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
NPK suppression was associated with increased eubacteria biodiversity, endospore bacteria and actinomycetes in alkaline soils.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- NPKe0
- Outcome
- suppressione0
- Direction
- increasee0
- Setting
- alkaline soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of NPK (nitrogen, phosphorous and potassium) suppression was remarkable as related to increase in eubacteria biodiversity, endospores bacteria and actinomycetes in alkaline soils.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Replacing potassium with magnesium significantly suppressed infection.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Replacement of potassium with magnesium (NPMg)e0
- Outcome
- infectione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Replacement of potassium with magnesium (NPMg) significantly suppressed infection and was associated with soil oligotrophism and antagonistic actinomycetes.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Replacing potassium with calcium significantly suppressed infection.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Replacement of potassium with calcium (NPCa)e0
- Outcome
- infectione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Replacement of potassium with calcium (NPCa) significantly suppressed infection, increased fungal biodiversity and antagonistic actinomycetes.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Replacing potassium with calcium increased fungal biodiversity and antagonistic actinomycetes.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Replacement of potassium with calcium (NPCa)e0
- Outcome
- fungal biodiversity and antagonistic actinomycetese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Replacement of potassium with calcium (NPCa) significantly suppressed infection, increased fungal biodiversity and antagonistic actinomycetes.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Composted chicken manure increased disease suppression.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Composted chicken manuree0
- Outcome
- suppressione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Composted chicken manure increased suppression and accompanied with a clear shift in soil biodiversity and increased antagonistic bacteria and fluorescent pseudomonas ratios.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Composted chicken manure shifted soil biodiversity and increased antagonistic bacteria and fluorescent pseudomonas ratios.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Composted chicken manuree0
- Outcome
- antagonistic bacteria and fluorescent pseudomonas ratiose0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Composted chicken manure increased suppression and accompanied with a clear shift in soil biodiversity and increased antagonistic bacteria and fluorescent pseudomonas ratios.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Plant animal compost suppressed disease.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Plant animal composte0
- Outcome
- disease suppressione0
- Direction
- suppressione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant animal compost showed disease suppression which accompanied with an increase in microbial biodiversity along with high ratio of antagonistic bacteria.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Plant animal compost increased microbial biodiversity with a high ratio of antagonistic bacteria.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Plant animal composte0
- Outcome
- microbial biodiversitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant animal compost showed disease suppression which accompanied with an increase in microbial biodiversity along with high ratio of antagonistic bacteria.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
In a naturally high organic matter area, increased organic matter dissociation and reduced carbon nitrogen ratio enhanced soil conduciveness to disease.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- soil conducivenesse0
- Direction
- enhancede0
- Qualifier
- natural high soil OM contente0
- Setting
- one areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in OM dissociation and reduction in C:N ratio was recorded in one area, characterised with natural high soil OM content, which enhanced soil conduciveness.”
t0“potato brown rot”
t1“potato brown rot”
Claim · model-written summary
Fertilization regimes for potato brown rot suppression should vary with soil edaphic factors.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- recommended fertilisation regime to suppress potato brown rot diseasee0
- Qualifier
- according to different soil edaphic factorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the recommended fertilisation regime to suppress potato brown rot disease vary from soil to another according to different soil edaphic factors.”
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