Claim · model-written summary
Labeled nitrate appeared in autumn drainage water five months after spring fertilizer application.
- Taxon
- winter wheat
Triticum aestivumt0 - Outcome
- 15 N‐labelled nitrate was detectede0
- Qualifier
- 5 months after the spring applicatione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“15 N‐labelled nitrate was detected in the first drainage water collected in autumn, 5 months after the spring application.”
t0“winter wheat”
Title
J. MARTINEZ; G. GUIRAUD Journal of Soil Science 1990. doi:10.1111/j.1365-2389.1990.tb00040.x
Other claims from this paper (18)
- Observation Winter wheat took up 154 kg N per hectare and recovered 60% of fertilizer nitrogen.
- Observation Winter wheat recovered 60% of fertilizer derived nitrogen.
- Observation Ryegrass catch crop produced 3.8t ha −1 dry herbage.
- Observation Ryegrass catch crop contained 43 kg N ha −1.
- Observation Of ryegrass nitrogen, 4.1% derived from labeled fertilizer.
- Observation Drainage nitrate concentration under bare fallow reached 68 mg N1 −1 and averaged 40 mg N1 −1.
- Observation Drainage nitrate concentration with ryegrass declined from 41 to 0.25 mg N I −1.
- Intervention effect Nitrogen leaching was 110 kg N ha −1 under bare fallow versus 40 kg N ha −1 under catch crop.
- Intervention effect Fertilizer nitrogen leaching was 18.7% under bare fallow versus 7.1% with catch crop.
- Observation Labeled fertilizer nitrogen accounted for about 34% of nitrogen loss in both treatments.
- Intervention effect Incorporated ryegrass reduced subsequent maize grain yield by 13%.
- Intervention effect Maize nitrogen uptake was 224 kg N ha −1 after fallow versus 180 kg ha −1 after ryegrass.
- Intervention effect Residual labeled nitrogen uptake by maize was 3% after fallow and 2% after ryegrass.
- Intervention effect After maize harvest, organic labeled fertilizer nitrogen in topsoil was 22.7% after ryegrass versus 15.7% after fallow.
- Observation Labeled nitrogen recovery was 91.7% in wheat/ryegrass/maize rotation.
- Observation Labeled nitrogen recovery was 97% in wheat/fallow/maize rotation.
- Recommendation The authors concluded that catch cropping reduces nitrogen leaching.
- Observation Establishing maize after ploughed down ryegrass was problematic.