Intervention effectmodel-written summary

SK2046H reached maximum panicle density and thousand-grain weight at 34 g/m2 plus 200 kg N/ha.

A claim from PERFORMANCE OF TRANSPLANTED HYBRID RICE VARIETIES UNDER DIFFERENT SEED RATES AND N-LEVELS · 2012

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Taxon: RICE VARIETIESOryza sativat0
Material: SK2046H (H2)e0
Treatment: 34 g/m2 with 200 kg N/hae0
Outcome: Number of panicles/m2 and 1000-grain weighte0
Direction: maximume0

Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

*Oryza sativa* · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0
“Number of panicles/m2 and 1000-grain weight of SK2046H (H2) reached to maximum value under seed rate of 34 g/m2 with 200 kg N/ha.”
✓ located verbatim in the source · abstract, characters 1863–1992

t0
“RICE VARIETIES”
✓ located verbatim in the source · title, characters 35–49

Title

PERFORMANCE OF TRANSPLANTED HYBRID RICE VARIETIES UNDER DIFFERENT SEED RATES AND N-LEVELS

R. Gorgy Journal of Plant Production 2012. doi:10.21608/jpp.2012.84029

Other claims from this paper (19)

Observation SK2034H exceeded SK2046H in seedling and shoot length.
Observation SK2046H exceeded SK2034H in leaves per seedling and root-to-shoot ratio.
Intervention effect Seed rates of 34 and 46 g/m2 gave the greatest nursery seedling vigor.
Intervention effect SK2034H had the highest leaves per seedling at 34 g/m2.
Intervention effect SK2046H had its highest leaves per seedling at 34 and 46 g/m2.
Intervention effect Rates of 34, 46, and 58 g/m2 improved the root-to-shoot ratio of SK2034H.
Intervention effect Only 34 g/m2 improved root-to-shoot ratio of SK2046H.
Observation SK2046H had higher dry matter, leaf area index, flag leaf area, and root dry weight than SK2034H.
Intervention effect A 34 g/m2 seed rate gave the highest field growth traits.
Intervention effect Applying 200 kg N/ha gave the greatest field growth parameters.
Intervention effect Combining 34 g/m2 with 200 kg N/ha maximized SK2046H dry matter content and flag leaf area.
Observation H2 exceeded H1 in panicle density, thousand-grain weight, and harvest index.
Observation H2 exceeded H1 in grain yield.
Observation H1 exceeded H2 in panicle weight and filled grains per panicle.
Intervention effect A 34 g/m2 seed rate was best for panicle density and yield components.
Intervention effect Seed rates of 34 and 46 g/m2 gave the highest grain yield and harvest index.
Intervention effect Adding 200 kg N/ha produced the greatest grain yield and yield components.
Intervention effect SK2034H had the most filled grains per panicle at 34 g/m2 and 200 kg N/ha.
Intervention effect Both hybrids had their best grain yield and harvest index at 34 or 46 g/m2 combined with 200 kg N/ha.

Record rev-e717b102b987f536f5b830e91f6d70de7e38122981471e39b67c204b6dd50711 · schema claims-v0.9 · position 18 in the model’s answer

nitrogen · yield · Oryza sativa (rice)Positive and negative results

2,045 papers: 1,803 positive, 242 negative or no effect

1,802 papers in the same direction as this claim · 193 in the opposite direction · 49 reporting no difference from an alternative

positive
N application increased grain yield, number of grains per panicle and number of tillers of rice in field conditions.
Response of Rice Cultivars to Rates of Nitrogen and Potassium Application in Field and Pot Conditions · 2007
Same directionCited by this paper
positive
Grain and straw nitrogen content and uptake rose significantly with nitrogen rate through 220 kg N/ha.
INFLUENCE OF SEEDLING AGE AND NITROGEN FERTILIZER LEVELS ON GROWTH, GRAIN YIELD, N-UPTAKE AND N-USE EFFICIENCY OF HYBRID RICE VARIETIES. · 2011
Same directionCited by this paper
negative
Green manure and rice straw nitrogen, alone or in combination with inorganic N, gave lower grain yield, agronomic efficiency and apparent nitrogen uptake than a standard split application of prilled urea.
Long-term Comparison of the Agronomic Efficiency and Residual Benefits of Organic and Inorganic Nitrogen Sources for Tropical Lowland Rice · 1996 · compared with a standard split application of prilled urea
Opposite direction
negative
Chaffy grain number and chaffy grain weight per 5 panicles increased significantly with enhancing nitrogen doses.
Physiological response of rice (Oryza sativaL.) genotypes to elevated nitrogen applied under field conditions · 2014
Opposite direction
negative
Excessive nitrogen yielded 2.68–6.31% less than appropriate nitrogen application.
Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains · 2022 · compared with appropriate nitrogen application (270 kg N ha−1)
Opposite direction
negative
SCU reduced rice yield, though not significantly.
Effects of different types of slow- and controlled-release fertilizers on rice yield · 2021
Opposite direction
negative
Preflood urea applied 14 days early yielded lowest grain yield of rice.
Ammonia Volatilization and Nitrogen Uptake for Conventional and Conservation Tilled Dry‐Seeded, Delayed‐Flood Rice · 2007
Opposite direction
no effect
Applying 30 kg N ha−1 at each SPAD drop below 37.5 gave rice yields equivalent to 120 kg N ha−1 applied in three splits
Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India · 2002 · compared with 120 kg N ha−1 applied in three splits
Opposite direction

2,036 papers more in this group

See all 2,045 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.

Other papers on the same question

nitrogen · yield · Oryza sativa (rice)Positive and negative results