Claim · model-written summary
N loss to the environment in onion production could only be decreased by lowering the fixed N rate before sowing or the threshold values.
- Taxon
- onions
Allium cepat0 - Treatment
- lowering the fixed N rate before sowing or lowering the threshold valuese6
- Outcome
- N loss to the environmente6
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“spring-sown onions”
e6“N loss to the environment could only be decreased by either lowering the fixed N rate before sowing or lowering the threshold values”
Title
C. L. De Visser The Journal of Horticultural Science and Biotechnology 1998. doi:10.1080/14620316.1998.11510992
Other claims from this paper (7)
- Observation The experimental recommendation system resulted in an average onion application rate of 72–110 kg N ha–1 for two- or three-way N splitting.
- Intervention effect The experimental recommendation system did not cause a loss of onion yield compared with the pre-sowing fixed N rate of 100 kg ha–1.
- Recommendation Reducing the threshold values of the experimental recommendation system could further reduce the total N rate for onions without yield loss.
- Intervention effect N splitting did not affect the estimated N loss during the growing season, the residual N in soil or the apparent recovery rate of onion N.
- Association Total N rate significantly influenced the estimated N loss, residual N and apparent recovery rate of onion N.
- Recommendation A soil sampling before sowing can be omitted from the sampling scheme of the experimental recommendation system for onions.
- Intervention effect Onion growth until the 3–4 leaf stage did not appear to be influenced by the N rate before sowing.