Claim · model-written summary
SPAD values correlated well with spinach leaf nitrate concentration.
- Taxon
- spinach
Spinacia oleraceat0 - Outcome
- leaf nitrate concentratione0
- Comparator
- SPAD valuese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“good correlation between SPAD values and leaf nitrate concentration”
t0“spinach”
Title
How does nitrogen fertilizer forms, dose and soil Pb pollution affect spinach qualities?
Yanju Liu; Yong‐Guan Zhu; Hui Ding; et al. Research Center for Eco-Environmental Sciences OpenIR (Chinese Academy of Sciences) 2008
Other claims from this paper (12)
- Intervention effect Spinach biomass did not differ by nitrogen fertilizer form.
- Intervention effect Raising ammonium nitrogen increased spinach biomass.
- Intervention effect Raising nitrate nitrogen decreased spinach biomass.
- Intervention effect Ammonia nitrogen fertilizer gave the lowest nitrate accumulation in spinach leaves among nitrogen forms.
- Intervention effect Nitrate nitrogen fertilizer produced higher nitrate nitrogen accumulation than other fertilizer forms.
- Intervention effect At low nitrogen level, ammonia nitrogen benefited spinach leaf nitrogen accumulation.
- Intervention effect At higher nitrogen level with Pb, ammonia nitrogen had the reverse effect on spinach leaf nitrogen accumulation.
- Intervention effect Urea nitrogen facilitated Pb accumulation in spinach roots.
- Intervention effect Ammonium nitrogen facilitated Pb accumulation in spinach leaves.
- Intervention effect Soil Pb pollution decreased spinach quality.
- Intervention effect Nitrate nitrogen fertilizer yielded lower leaf and root Pb than urea and ammonia fertilizer.
- Recommendation SPAD could be used to pre-evaluate spinach nitrate concentration and potentially determine harvest time.