Claim · model-written summary
Incorporated ryegrass reduced subsequent maize grain yield by 13%.
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the ryegrass catch crop incorporated at the time of seedbed preparation in spring, the subsequent maize grain‐yield was lowered by an average of 13%.”
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.
- Observation Labeled nitrate appeared in autumn drainage water five months after spring fertilizer application.
- 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 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.