Claim · model-written summary
Excess nitrogen decreased physiological efficiency and internal nitrogen use efficiency.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- excessive N applicatione0
- Outcome
- physiological efficiency and internal N use efficiencye0
- Direction
- decreasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the excessive N application also obviously decreased the grain yield, N uptake efficiency, apparent recovery fraction of applied fertilizer N, physiological efficiency and internal N use efficiency”
t0“wheat”
Title
Dong Wang; Zhenzhu Xu; Junye Zhao; et al. Acta Agriculturae Scandinavica Section B - Soil & Plant Science 2011. doi:10.1080/09064710.2010.534108
Other claims from this paper (17)
- Observation Most accumulated wheat nitrogen came from soil, with smaller shares from basal and topdressing fertilizer.
- Observation The basal nitrogen fertilizer recovery averaged 33.9% in plants.
- Observation Basal fertilizer residual nitrogen averaged 59.2% in soil.
- Observation Topdressing fertilizer recovery averaged 50.5% in plants.
- Observation Topdressing residual nitrogen averaged 48.2% in soil.
- Association More topdressing nitrogen accumulated in plants than basal nitrogen.
- Observation More topdressing nitrogen remained in shallower than deeper soil at maturity.
- Observation Soil nitrate moved downward before winter, accumulating mostly below 140 cm.
- Association As nitrogen rate rose, the share of plant nitrogen derived from soil declined.
- Association As nitrogen rate rose, shares of plant nitrogen from basal and topdressing fertilizer increased.
- Association Increasing fertilizer rate decreased plant recovery of basal and topdressing nitrogen.
- Association Increasing fertilizer rate raised residual fertilizer nitrogen in soil.
- Intervention effect Moderate nitrogen application increased soil nitrate, plant nitrogen uptake, grain yield and apparent fertilizer recovery.
- Intervention effect Application above 240 kg N promoted downward movement of basal and topdressing nitrogen and soil nitrate.
- Intervention effect Excess nitrogen had no significant effect on nitrogen uptake amount.
- Intervention effect Excess nitrogen decreased grain yield, nitrogen use and recovery efficiencies.
- Recommendation The authors recommend a nitrogen rate of 96168 kg N ha (1 for high yielding wheat fields.