Abstract
Sununary - Effects of Meloidogyne graminicola and nitrogen applications on growth and yield of upland rice cultivar UPL Ri-5 were studied in two glasshouse experiments. Plant height, shoot weight, I.eaf area, root weight, depth of rooting, and number of panicles and grains were reduced by the nematode. Grain yield was reduced by 30-70 % when the number of infective juveniles present around young seedlings at transplanting (Pi) was ~ 375. Total nitrogen in shoots decreased by 10-31 % at maximum tiUering and by 14-20 % at flowering when 375 ~ Pi ~ 7500. Nitrogen concentration in shoots was not reduced. Root nitrogen concentra tion increased by 70-140 % at flowering and by 101-145 % at maturiry with 375 ~ Pi ~ 7500. The nitrogen concentration in roots was positively correlated with Pi and the number of juveniles recovered from the rOOts. Nitrogen application increased growth and yield whether plants were infested by the nematode or not. However, because the percentage of yield loss remained approximately constant for a given Pi across the range of nitrogen quantities applied, nitrogen applications did not reduce the relative nematode effect.
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Claims 10
Claim · model-written summary
Meloidogyne graminicola reduced rice growth components and grain numbers.
- Taxon
- upland rice
Oryza sativat0 - Treatment
- nematodee0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Plant height, shoot weight, I.eaf areae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, shoot weight, I.eaf area, root weight, depth of rooting, and number of panicles and grains were reduced by the nematode”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
The nematode reduced grain yield by 30-70 % near Pi 375.
- Taxon
- upland riceOryza sativat0
- Treatment
- infective juvenilese0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Grain yielde0
- Direction
- reducede0
- Value
- 30-70 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was reduced by 30-70 % when the number of infective juveniles present around young seedlings at transplanting (Pi) was ~ 375”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Shoot total nitrogen decreased by 10-31 % at maximum tillering.
- Taxon
- upland riceOryza sativat0
- Treatment
- Meloidogyne graminicolat0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Total nitrogen in shootse0
- Direction
- decreasede0
- Value
- 10-31 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total nitrogen in shoots decreased by 10-31 % at maximum tiUering”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Shoot total nitrogen decreased by 14-20 % at flowering.
- Taxon
- upland riceOryza sativat0
- Treatment
- Meloidogyne graminicolat0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Total nitrogen in shootse1
- Direction
- decreaseinferredt0
- Value
- 14-20 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 14-20 % at flowering when 375 ~ Pi ~ 7500”
e1“Total nitrogen in shoots decreased by 10-31 % at maximum tiUering”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Shoot nitrogen concentration was not reduced by nematodes.
- Taxon
- upland riceOryza sativat0
- Treatment
- Meloidogyne graminicolat0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Nitrogen concentration in shootse0
- Direction
- not reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen concentration in shoots was not reduced”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Root nitrogen concentration rose 70-140 % at flowering.
- Taxon
- upland riceOryza sativat0
- Treatment
- Meloidogyne graminicolat0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Root nitrogen concentra tione0
- Direction
- increasede0
- Value
- 70-140 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root nitrogen concentra tion increased by 70-140 % at flowering”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Root nitrogen concentration rose 101-145 % at maturity.
- Taxon
- upland riceOryza sativat0
- Treatment
- Meloidogyne graminicolat0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- Root nitrogen concentra tione1
- Direction
- increaseinferredt0
- Value
- 101-145 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 101-145 % at maturiry with 375 ~ Pi ~ 7500”
e1“Root nitrogen concentra tion increased by 70-140 % at flowering”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Root nitrogen concentration correlated positively with Pi and recovered juveniles.
- Taxon
- upland riceOryza sativat0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- nitrogen concentration in rootse0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen concentration in roots was positively correlated with Pi and the number of juveniles recovered from the rOOts”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Nitrogen application increased rice growth and yield irrespective of infestation.
- Taxon
- upland riceOryza sativat0
- Treatment
- Nitrogen applicatione0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- growth and yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application increased growth and yield whether plants were infested by the nematode or not”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
Claim · model-written summary
Nitrogen application did not reduce relative nematode yield loss.
- Taxon
- upland riceOryza sativat0
- Treatment
- nitrogen applicationse0
- Interactor
- Meloidogyne graminicolaMeloidogyne graminicolat0pathogen
- Outcome
- relative nematode effecte0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen applications did not reduce the relative nematode effect”
t0“upland rice cultivar UPL Ri-5 caused by Meloidogyne graminicola”
The same questions in other papers
Meloidogyne graminicola · nutrient: content · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
infection · Meloidogyne graminicola · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
nitrogen · Meloidogyne graminicola · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
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.