Abstract
Rice is important crop for world population, including Brazil. Nitrogen (N) is one of the most yield limiting nutrients in rice production under all agro-ecological conditions. A greenhouse experiment was conducted to evaluate N responses to 12 lowland rice genotypes. Soil used in the experiment was a Gley humic according to Brazilian soil classification system and Inceptisol according to USA soil taxonomy classification. The N rates used were 0 mg kg−1 (low) and 300 mg kg−1 (high) of soil. Plant height, straw yield, grain yield, panicle density, 1000 grain weight, and root dry weight were significantly increased with the addition of N fertilization. These growth, yield, and yield components were also significantly influenced by genotype treatment. Grain yield had significant linear or quadratic association with shoot dry weight, panicle number and 1000 grain weight Based on grain efficiency index genotypes were classified as efficient, moderately efficient and inefficient in N use. The N efficient genotypes were ‘BRS Tropical’, ‘BRS Jaçanã’, ‘BRA 02654’, ‘BRA 051077’, ‘BRA 051083’, ‘BRA 051108’, ‘BRA 051130’ and ‘BRA 051250’. Remaining genotypes fall into moderately efficient group. None of the genotypes were grouped as inefficient in N use efficiency.
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Claims 8
Claim · model-written summary
Nitrogen fertilization significantly increased plant height.
- Taxon
- Rice
Oryza sativat0 - Treatment
- N fertilizatione0
- Outcome
- Plant heighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, straw yield, grain yield, panicle density, 1000 grain weight, and root dry weight were significantly increased with the addition of N fertilization.”
t0“Rice”
Claim · model-written summary
Nitrogen fertilization significantly increased straw yield, grain yield and panicle density.
- Taxon
- RiceOryza sativat0
- Treatment
- N fertilizatione0
- Outcome
- straw yield, grain yield, panicle densitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, straw yield, grain yield, panicle density, 1000 grain weight, and root dry weight were significantly increased with the addition of N fertilization.”
t0“Rice”
Claim · model-written summary
Nitrogen fertilization significantly increased 1000 grain weight and root dry weight.
- Taxon
- RiceOryza sativat0
- Treatment
- N fertilizatione0
- Outcome
- 1000 grain weight, and root dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, straw yield, grain yield, panicle density, 1000 grain weight, and root dry weight were significantly increased with the addition of N fertilization.”
t0“Rice”
Claim · model-written summary
Growth, yield and yield components differed significantly by genotype.
- Taxon
- RiceOryza sativat0
- Treatment
- genotype treatmente0
- Outcome
- growth, yield, and yield componentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These growth, yield, and yield components were also significantly influenced by genotype treatment.”
t0“Rice Genotypes”
Claim · model-written summary
Grain yield had a significant linear or quadratic association with shoot dry weight, panicle number and 1000 grain weight.
- Taxon
- RiceOryza sativat0
- Organ / stage
- shoote0
- Outcome
- Grain yielde0
- Qualifier
- linear or quadratic association with shoot dry weight, panicle number and 1000 grain weighte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield had significant linear or quadratic association with shoot dry weight, panicle number and 1000 grain weight”
t0“Rice”
Claim · model-written summary
Eight named genotypes were classified as nitrogen efficient.
- Taxon
- RiceOryza sativat0
- Outcome
- N efficient genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N efficient genotypes were ‘BRS Tropical’, ‘BRS Jaçanã’, ‘BRA 02654’, ‘BRA 051077’, ‘BRA 051083’, ‘BRA 051108’, ‘BRA 051130’ and ‘BRA 051250’.”
t0“Rice”
Claim · model-written summary
Remaining genotypes were moderately efficient in nitrogen use.
- Taxon
- RiceOryza sativat0
- Outcome
- moderately efficient groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Remaining genotypes fall into moderately efficient group.”
t0“Rice”
Claim · model-written summary
No genotype was classified as inefficient in nitrogen use.
- Taxon
- RiceOryza sativat0
- Outcome
- None of the genotypes were grouped as inefficient in N use efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“None of the genotypes were grouped as inefficient in N use efficiency.”
t0“Rice”
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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.