Abstract
An experiment was conducted in microplots (7 by 7m) to investigate the effect of 2 non-symbiotic N2-fixing bacteria [ Azotobacter (strain CS1) and Azospirillum (strain CM4)] in the presence of 50 kg N/ha on the performances of the diazotrophs with respect to nitrogen accretion and its transformation in the rhizosphere soils of rice ( Oryza sativa L. cv. IR-36). In most cases, a successful inoculation of the diazotrophs was recorded, with the proliferation of Azotobacter and Azospirillum , either alone or in combination, in the rhizosphere soils, and nitrogenase activity (C2H2 reduction) of the microbes was present in rice roots. The uninoculated soil receiving 100 kg N/ha recorded the highest amount of total nitrogen, non-hydrolysable organic nitrogen, available nitrogen, and hydrolysable organic nitrogen content in the rhizosphere soils, resulting in greater yield of the crop. Inoculation of the diazotrophs substantially increased different fractions of nitrogen content in the rhizosphere soils, and the increase in total nitrogen, non-hydrolysable organic nitrogen, and hydrolysable organic nitrogen was greater due to Azotobacter than either Azospirillum or a combination of Azotobacter and Azospirillum . Total and mineral nitrogen content increased at maximum tillering to flowering stages of the crop, followed by a decline at maturity, whereas, hydrolysable organic nitrogen decreased with a concomitant increase in non-hydrolysable fraction with the age of the crop.
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Claims 16
Claim · model-written summary
Azotobacter proliferated in rice rhizosphere soil after inoculation.
- Taxon
- rice
Oryza sativat0 - Interactor
- Azotobacter
Azotobactere0symbiont - Outcome
- proliferation of Azotobactere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proliferation of Azotobacter and Azospirillum , either alone or in combination, in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Azospirillum proliferated in rice rhizosphere soil after inoculation.
- Taxon
- riceOryza sativat0
- Interactor
- Azospirillum
Azospirillume0symbiont - Outcome
- proliferation of Azotobacter and Azospirillume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proliferation of Azotobacter and Azospirillum , either alone or in combination, in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Microbial nitrogenase activity was present in rice roots.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Gene
- nitrogenasee0
- Outcome
- nitrogenase activity (C2H2 reduction) of the microbes was presente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogenase activity (C2H2 reduction) of the microbes was present in rice roots”
Claim · model-written summary
Uninoculated soil with 100 kg N/ha had the highest total rhizosphere nitrogen.
- Taxon
- riceOryza sativat0
- Treatment
- 100 kg N/hae0
- Outcome
- total nitrogene0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uninoculated soil receiving 100 kg N/ha recorded the highest amount of total nitrogen, non-hydrolysable organic nitrogen, available nitrogen, and hydrolysable organic nitrogen content in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Uninoculated soil with 100 kg N/ha had the highest non-hydrolysable organic nitrogen.
- Taxon
- riceOryza sativat0
- Treatment
- 100 kg N/hae0
- Outcome
- non-hydrolysable organic nitrogene0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uninoculated soil receiving 100 kg N/ha recorded the highest amount of total nitrogen, non-hydrolysable organic nitrogen, available nitrogen, and hydrolysable organic nitrogen content in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Uninoculated soil with 100 kg N/ha had the highest available nitrogen.
- Taxon
- riceOryza sativat0
- Treatment
- 100 kg N/hae0
- Outcome
- available nitrogene0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uninoculated soil receiving 100 kg N/ha recorded the highest amount of total nitrogen, non-hydrolysable organic nitrogen, available nitrogen, and hydrolysable organic nitrogen content in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Uninoculated soil with 100 kg N/ha had the highest hydrolysable organic nitrogen.
- Taxon
- riceOryza sativat0
- Treatment
- 100 kg N/hae0
- Outcome
- hydrolysable organic nitrogene0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uninoculated soil receiving 100 kg N/ha recorded the highest amount of total nitrogen, non-hydrolysable organic nitrogen, available nitrogen, and hydrolysable organic nitrogen content in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Uninoculated 100 kg N/ha soil produced greater rice yield.
- Taxon
- riceOryza sativat0
- Treatment
- 100 kg N/hae0
- Outcome
- yield of the crope0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uninoculated soil receiving 100 kg N/ha recorded the highest amount of total nitrogen, non-hydrolysable organic nitrogen, available nitrogen, and hydrolysable organic nitrogen content in the rhizosphere soils, resulting in greater yield of the crop”
t0“rice”
Claim · model-written summary
Diazotroph inoculation increased nitrogen fractions in rice rhizosphere soil.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculation of the diazotrophse0
- Outcome
- different fractions of nitrogen content in the rhizosphere soilse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of the diazotrophs substantially increased different fractions of nitrogen content in the rhizosphere soils”
t0“rice”
Claim · model-written summary
Azotobacter increased total nitrogen more than Azospirillum or their combination.
- Taxon
- riceOryza sativat0
- Treatment
- Azotobactere0
- Interactor
- AzotobacterAzotobactere0symbiont
- Second interactor
- AzospirillumAzospirillume0symbiont
- Outcome
- total nitrogene0
- Direction
- greatere0
- Comparator
- Azospirillume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in total nitrogen, non-hydrolysable organic nitrogen, and hydrolysable organic nitrogen was greater due to Azotobacter than either Azospirillum or a combination of Azotobacter and Azospirillum”
t0“rice”
Claim · model-written summary
Azotobacter increased non-hydrolysable organic nitrogen more than alternatives.
- Taxon
- riceOryza sativat0
- Treatment
- Azotobactere0
- Interactor
- AzotobacterAzotobactere0symbiont
- Outcome
- non-hydrolysable organic nitrogene0
- Direction
- greatere0
- Comparator
- Azospirillume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in total nitrogen, non-hydrolysable organic nitrogen, and hydrolysable organic nitrogen was greater due to Azotobacter than either Azospirillum or a combination of Azotobacter and Azospirillum”
t0“rice”
Claim · model-written summary
Azotobacter increased hydrolysable organic nitrogen more than alternatives.
- Taxon
- riceOryza sativat0
- Treatment
- Azotobactere0
- Interactor
- AzotobacterAzotobactere0symbiont
- Outcome
- hydrolysable organic nitrogene0
- Direction
- greatere0
- Comparator
- Azospirillume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in total nitrogen, non-hydrolysable organic nitrogen, and hydrolysable organic nitrogen was greater due to Azotobacter than either Azospirillum or a combination of Azotobacter and Azospirillum”
t0“rice”
Claim · model-written summary
Total nitrogen rose from tillering to flowering and then fell by maturity.
- Taxon
- riceOryza sativat0
- Organ / stage
- maximum tillering to flowering stagese0
- Outcome
- Total and mineral nitrogen contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total and mineral nitrogen content increased at maximum tillering to flowering stages of the crop, followed by a decline at maturity”
t0“rice”
Claim · model-written summary
Mineral nitrogen rose from tillering to flowering and then fell by maturity.
- Taxon
- riceOryza sativat0
- Organ / stage
- maximum tillering to flowering stagese0
- Outcome
- mineral nitrogen contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total and mineral nitrogen content increased at maximum tillering to flowering stages of the crop, followed by a decline at maturity”
t0“rice”
Claim · model-written summary
Hydrolysable organic nitrogen declined with crop age.
- Taxon
- riceOryza sativat0
- Outcome
- hydrolysable organic nitrogene0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydrolysable organic nitrogen decreased with a concomitant increase in non-hydrolysable fraction with the age of the crop”
t0“rice”
Claim · model-written summary
Non-hydrolysable nitrogen increased with crop age.
- Taxon
- riceOryza sativat0
- Outcome
- non-hydrolysable fractione0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydrolysable organic nitrogen decreased with a concomitant increase in non-hydrolysable fraction with the age of the crop”
t0“rice”
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See all 167 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.