Claim · model-written summary
Rice grain yield rose linearly with vetch to 8.4 Mg/ha at the highest application rate.
- Taxon
- Rice ( Oryza sativa L.)
Oryza sativae2 - Treatment
- vetche0
- Outcome
- Grain yieldse1
- Direction
- responded linearlye0
- Value
- 8.4 Mg/hae0
- Qualifier
- highest rate of additione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“responded linearly to vetch up to 8.4 Mg/ha with the highest rate of addition”
e1“Grain yields were highly dependent on N uptake”
e2“Rice ( Oryza sativa L.)”
Title
Comparison of Organic and Inorganic Nitrogen Sources for Rice1
M. P. Westcott; D. S. Mikkelsen Agronomy Journal 1987. doi:10.2134/agronj1987.00021962007900050037x
Other claims from this paper (10)
- Intervention effect Ammonium sulfate raised extractable nitrogen early in the season more effectively than vetch.
- Intervention effect Ammonium sulfate contributed more to rice nitrogen status throughout the season.
- Intervention effect There was no evidence that vetch prolonged nitrogen availability to rice.
- Association Rice grain yield depended strongly on nitrogen uptake.
- Intervention effect Rice grain yield reached 10.1 Mg/ha with 120 kg N/ha as ammonium sulfate.
- Intervention effect Ammonium sulfate yielded greater labeled nitrogen recovery by rice than vetch, 19% versus 10.1%.
- Intervention effect Ammonium sulfate yielded greater apparent nitrogen recovery by rice than vetch, 55.6% versus 27.9%.
- Intervention effect More vetch nitrogen remained in soil at harvest than nitrogen from ammonium sulfate.
- Intervention effect Total nitrogen recoveries did not differ significantly between sources.
- Mechanism Early green manure nitrogen mineralization appears to limit its performance compared with inorganic nitrogen.