Claim · model-written summary
Onion bulb diameter did not differ significantly among treatments.
- Taxon
- onion
Allium cepae0 - Treatment
- natural rock powder (NRP)e1
- Outcome
- bulb diametere0
- Direction
- no significant differencese0
- Comparator
- mineral fertilizer controle2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences in onion fresh weight or bulb diameter across all treatments”
e1“natural rock powder (NRP), derived from potassium (K) feldspar”
e2“a mineral fertilizer control”
Title
Evaluation of Natural Rock Powder as a Potassium Source for Onion (Allium cepa L.) Cultivation
Jinhwan Park; Taehee Baek; Namhee Yi; et al. Korean Journal of Soil Science and Fertilizer 2026. doi:10.7745/kjssf.2026.59.2.198
Other claims from this paper (8)
- Intervention effect Onion fresh weight did not differ significantly among fertilizer treatments.
- Intervention effect Plant tissue K content was lower with NRP than with mineral fertilizer.
- Intervention effect NRP-2 significantly reduced plant tissue K content relative to control.
- Intervention effect NRP-MP significantly reduced plant tissue K content relative to control.
- Mechanism Lower K uptake was attributed to low NRP solubility and retention on mulch during top dressing.
- Method / resource Mineral fertilizer released about twice the cumulative K of NRP in laboratory elution tests.
- Method / resource Si release from the control and NRP treatments was comparable in elution tests.
- Recommendation The authors recommend improving NRP solubility or application methods for plastic-mulched crops.