Abstract
The effect of inoculation of Azotobacter (strain BS9) and Azospirillum (strain BM9), either singly or in combination, on N-accretion and its transformation in the rhizosphere of wetland rice was investigated. Inoculation of Azotobacter and Azospirillum either alone or in a combination along with N-fertilizer (50 kg ha-1) stimulated the growth and activities of non-symbiotic N2-fixing bacteria in the rhizosphere soil of wetland rice. Inoculation with the diazotrophs increased the nitrogenase activity (C2H2 reduction) of rice roots, availability of inorganic N (exchangeable NH4 +-N and soluble NO3 --N), accumulation and mineralization of hydrolysable organic N (hydrolysable NH4 +-N, amino acid-N and hexosamine-N) in the rhizosphere soil, resulting in a greater yield of the crop. In general, single inoculation of the diazotrophs exhibited better performance than their combined inoculation. Between the two non-symbiotic N2-fixing bacteria, Azotobacter was more effective than Azospirillum in the rice rhizosphere.
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Claims 7
Claim · model-written summary
Azotobacter and Azospirillum inoculation with nitrogen fertilizer stimulated rhizosphere nitrogen-fixing bacterial growth and activity.
- Taxon
- rice
Oryza sativae1 - Treatment
- Inoculation of Azotobacter and Azospirillum either alone or in a combination along with N-fertilizer (50 kg ha-1)e0
- Interactor
- Azotobacter and Azospirillum
Azospirillum
Azotobactere0symbiont - Outcome
- growth and activities of non-symbiotic N2-fixing bacteriae0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of Azotobacter and Azospirillum either alone or in a combination along with N-fertilizer (50 kg ha-1) stimulated the growth and activities of non-symbiotic N2-fixing bacteria in the rhizosphere soil of wetland rice.”
e1“in wetland rice soil”
Claim · model-written summary
Diazotroph inoculation increased nitrogenase activity of rice roots.
- Taxon
- riceOryza sativae1
- Organ / stage
- rice rootse0
- Treatment
- Inoculation with the diazotrophse0
- Outcome
- nitrogenase activity (C2H2 reduction)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with the diazotrophs increased the nitrogenase activity (C2H2 reduction) of rice roots”
e1“in wetland rice soil”
e2“Inoculation with the diazotrophs increased”
Claim · model-written summary
Diazotroph inoculation increased inorganic nitrogen availability in the rice rhizosphere.
- Taxon
- riceOryza sativae1
- Treatment
- diazotrophse2
- Outcome
- availability of inorganic N (exchangeable NH4 +-N and soluble NO3 --N)e0
- Direction
- increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“availability of inorganic N (exchangeable NH4 +-N and soluble NO3 --N)”
e1“in wetland rice soil”
e2“Inoculation with the diazotrophs increased”
e3“Inoculation with the diazotrophs increased”
e4“Inoculation with the diazotrophs increased”
Claim · model-written summary
Diazotroph inoculation increased hydrolysable organic nitrogen accumulation and mineralization in rice rhizosphere soil.
- Taxon
- riceOryza sativae1
- Treatment
- diazotrophse2
- Outcome
- accumulation and mineralization of hydrolysable organic Ne0
- Direction
- increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accumulation and mineralization of hydrolysable organic N (hydrolysable NH4 +-N, amino acid-N and hexosamine-N) in the rhizosphere soil”
e1“in wetland rice soil”
e2“Inoculation with the diazotrophs increased”
e3“Inoculation with the diazotrophs increased”
e4“Inoculation with the diazotrophs increased”
Claim · model-written summary
Diazotroph inoculation resulted in greater rice yield.
- Taxon
- riceOryza sativae1
- Treatment
- diazotrophse2
- Outcome
- yield of the crope0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in a greater yield of the crop.”
e1“in wetland rice soil”
e2“Inoculation with the diazotrophs increased”
e3“Inoculation with the diazotrophs increased”
Claim · model-written summary
Single diazotroph inoculation generally performed better than combined inoculation.
- Taxon
- riceOryza sativae1
- Treatment
- single inoculation of the diazotrophse0
- Outcome
- performancee0
- Direction
- bettere0
- Comparator
- combined inoculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“single inoculation of the diazotrophs exhibited better performance than their combined inoculation.”
e1“in wetland rice soil”
e2“Inoculation with the diazotrophs increased”
Claim · model-written summary
Azotobacter was more effective than Azospirillum in the rice rhizosphere.
- Taxon
- riceOryza sativae1
- Treatment
- Azotobactere0
- Interactor
- AzotobacterAzotobactere0symbiont
- Second interactor
- AzospirillumAzospirillume0symbiont
- Outcome
- effectivee0
- Direction
- more effectivee0
- Comparator
- Azospirillume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azotobacter was more effective than Azospirillum in the rice rhizosphere.”
e1“in wetland rice soil”
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See all 511 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.