Claim · model-written summary
Increasing nitrogen rate reduced soil-derived nitrogen accumulated in wheat.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- increase of N fertilizer ratee0
- Outcome
- soil N accumulated in wheat plante0
- Direction
- decreasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With an increase of N fertilizer rate,soil N accumulated in wheat plant decreased”
t0“winter wheat”
Title
Zhao Jun; Zhen Yu Acta Ecologica Sinica 2006
Other claims from this paper (19)
- Observation At maturity, 73.32% to 87.27% of wheat nitrogen came from soil.
- Observation At maturity, 4.51% to 9.40% of wheat nitrogen came from basal fertilizer.
- Observation At maturity, 8.22% to 17.28% of wheat nitrogen came from topdressed fertilizer.
- Intervention effect Increasing nitrogen rate increased fertilizer nitrogen accumulated in wheat and remaining in soil.
- Intervention effect Fertilizer nitrogen recovery rate declined significantly with increasing nitrogen rate.
- Observation Basal fertilizer contributed less nitrogen to wheat and residual soil than topdressed fertilizer.
- Observation Basal fertilizer nitrogen losses exceeded topdressed fertilizer nitrogen losses.
- Association Wheat absorbed more soil nitrogen in the higher fertility field.
- Association Wheat absorbed less fertilizer nitrogen in the higher fertility field.
- Association More fertilizer nitrogen remained in soil or was lost in the higher fertility field.
- Observation Differences between fertility fields in plant uptake, soil residual nitrogen, and nitrogen loss arose mainly from basal fertilizer.
- Observation At 105 kg/hm~2 nitrogen, no large nitrate accumulation was found in 0～100cm soil at maturity.
- Intervention effect Soil nitrate increased sharply as nitrogen fertilizer rate increased.
- Observation Above 195 kgN/hm~2 nitrogen, soil nitrate moved down.
- Association Upward soil nitrate movement occurred earlier and deeper in the higher fertility field.
- Intervention effect Increasing nitrogen fertilizer rate lowered wheat nitrogen uptake and utilization efficiency.
- Intervention effect Appropriate nitrogen fertilization increased grain yield, protein content, and wheat nitrogen accumulation.
- Observation Both fields achieved high grain yield of 8800 kg/hm~2 and protein content of 14.20%.
- Recommendation The authors recommend nitrogen rates of 105～150 kg/hm~2 and 150～195 kg/hm~2 for the two fields, respectively.