Claim · model-written summary
The three crops took up similar quantities of total and soil nitrogen across fertilizer labeling treatments.
- Taxon
- maize, sorghum and sunflower
Helianthus annuus
Sorghum
Zea mayse1 - Treatment
- ammonium nitratee2
- Outcome
- total N and soil Ne0
- Direction
- similare0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“similar quantities of total N and soil N were together taken up by the three crops.”
e1“maize, sorghum and sunflower plants”
e2“The maize (1st) crop utilized 45.2%, the sorghum (2nd) crop 23.2% and the sunflower (3rd) crop 12.5% of the ammonium nitrate.”
Title
Utilization of initially-applied labelled ammonium nitrate by three successive crops
A. D.P. Botha; D. C. Pretorius; J. C. Johnson; et al. South African Journal of Plant and Soil 1992. doi:10.1080/02571862.1992.10634597
Other claims from this paper (10)
- Intervention effect Crop tops recovered 75.8% of initially applied labeled ammonium nitrogen, significantly less than nitrate nitrogen.
- Observation Crop tops recovered 85.9% of labeled nitrate nitrogen.
- Observation maize utilized 45.2% of the ammonium nitrate.
- Observation sorghum utilized 23.2% of the ammonium nitrate.
- Observation sunflower utilized 12.5% of the ammonium nitrate.
- Observation Nitrogen recovery with both ions labeled corresponded to the sum of separately labeled ion recoveries.
- Intervention effect Ammonium nitrate fertilization increased successive crops’ nitrogen uptake from soil reserves relative to controls.
- Observation Ammonium nitrate apparently stimulated humus mineralization in fertilized pots.
- Observation At the end of the experiment, 17.7% of fertilizer nitrogen remained in pot soil.
- Observation The nitrogen balance accounted for an average of 100% of applied ammonium nitrate.