Abstract
Afield experiment was conducted at Rice Research Station of Tonekabon, Iran, to determine the effect of seed inoculation with plant growth-promoting rhizobacteria on rice grain yield and yield components under different nitrogen (N) rates. The experimental design was a Randomized Complete Block with factorial arrangement and three replicates. Factors included seed inoculation with plant growth-promoting rhizobacteria [control (un-inoculated), seed inoculation with Azospirillum lipoferum, seed inoculation with Azotobacter chroococcum, and seed inoculation with a combination of A. lipoferum and A. chroococcum] and N rates (100%, 75%, and 50% of recommended nitrogen rates, i.e. 100, 75 and 50 kg N ha-1, respectively). Results showed that the highest grain yield (7875 kg ha-1) was recorded for plants inoculated with a combination of A. lipoferum and A. chroococcum, while the lowest one was recorded for un-inoculated control plants. Moreover, rice grain yield, panicle number per m2, grain number per panicle, and 1000-grain weight increased by 9%, 9%, 18%, and 6%, respectively, as N fertilizer rate increased from 50 to 100 kg ha-1. The highest grain yield (7875 kg ha-1) was obtained when N was applied at the rate of 75 kg ha-1 to seeds inoculated with a combination of A. lipoferum and A. chroococcum.
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Claims 6
Claim · model-written summary
Seed inoculation with A. lipoferum and A. chroococcum combined gave the highest rice grain yield, against un-inoculated control plants
- Taxon
- rice
Oryza sativat0 - Treatment
- inoculated with a combination of A. lipoferum and A. chroococcume0
- Interactor
- A. lipoferumAzospirillum lipoferume0symbiont
- Second interactor
- A. chroococcumAzotobacter chroococcume0symbiont
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 7875 kg ha-1e0
- Comparator
- un-inoculated control plantse0
- Setting
- Rice Research Station of Tonekabon, Irane2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest grain yield (7875 kg ha-1) was recorded for plants inoculated with a combination of A. lipoferum and A. chroococcum, while the lowest one was recorded for un-inoculated control plants”
t0“Rice Fields”
e2“experiment was conducted at Rice Research Station of Tonekabon, Iran”
Claim · model-written summary
Rice grain yield increased by 9% as N fertilizer rate increased from 50 to 100 kg ha-1
- Taxon
- riceOryza sativae1
- Treatment
- N fertilizer rate increased from 50 to 100 kg ha-1e1
- Outcome
- grain yielde1
- Direction
- increasede1
- Value
- 9%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“rice grain yield, panicle number per m2, grain number per panicle, and 1000-grain weight increased by 9%, 9%, 18%, and 6%, respectively, as N fertilizer rate increased from 50 to 100 kg ha-1”
t0“Rice Fields”
Claim · model-written summary
Panicle number per m2 increased by 9% as N fertilizer rate increased from 50 to 100 kg ha-1
- Taxon
- riceOryza sativae1
- Treatment
- N fertilizer rate increased from 50 to 100 kg ha-1e1
- Outcome
- panicle number per m2e1
- Direction
- increasede1
- Value
- 9%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“rice grain yield, panicle number per m2, grain number per panicle, and 1000-grain weight increased by 9%, 9%, 18%, and 6%, respectively, as N fertilizer rate increased from 50 to 100 kg ha-1”
t0“Rice Fields”
Claim · model-written summary
Grain number per panicle increased by 18% as N fertilizer rate increased from 50 to 100 kg ha-1
- Taxon
- riceOryza sativae1
- Treatment
- N fertilizer rate increased from 50 to 100 kg ha-1e1
- Outcome
- grain number per paniclee1
- Direction
- increasede1
- Value
- 18%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“rice grain yield, panicle number per m2, grain number per panicle, and 1000-grain weight increased by 9%, 9%, 18%, and 6%, respectively, as N fertilizer rate increased from 50 to 100 kg ha-1”
t0“Rice Fields”
Claim · model-written summary
1000-grain weight increased by 6% as N fertilizer rate increased from 50 to 100 kg ha-1
- Taxon
- riceOryza sativae1
- Treatment
- N fertilizer rate increased from 50 to 100 kg ha-1e1
- Outcome
- 1000-grain weighte1
- Direction
- increasede1
- Value
- 6%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“rice grain yield, panicle number per m2, grain number per panicle, and 1000-grain weight increased by 9%, 9%, 18%, and 6%, respectively, as N fertilizer rate increased from 50 to 100 kg ha-1”
t0“Rice Fields”
Claim · model-written summary
Highest rice grain yield (7875 kg ha-1) obtained with 75 kg N ha-1 applied to seeds inoculated with A. lipoferum and A. chroococcum
- Taxon
- riceOryza sativat0
- Treatment
- N was applied at the rate of 75 kg ha-1 to seeds inoculated with a combination of A. lipoferum and A. chroococcume3
- Interactor
- A. lipoferumAzospirillum lipoferume3symbiont
- Second interactor
- A. chroococcumAzotobacter chroococcume3symbiont
- Outcome
- grain yielde3
- Direction
- higheste3
- Value
- 7875 kg ha-1e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The highest grain yield (7875 kg ha-1) was obtained when N was applied at the rate of 75 kg ha-1 to seeds inoculated with a combination of A. lipoferum and A. chroococcum”
t0“Rice Fields”
The same questions in other papers
Azotobacter chroococcum · yield · Oryza sativa (rice)Results agree
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- positive
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- negative
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See all 418 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- no effect
- no effect
- negative
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See all 3,455 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.