Claim · model-written summary
At higher nitrogen level with Pb, ammonia nitrogen had the reverse effect on spinach leaf nitrogen accumulation.
- Taxon
- spinach
Spinacia oleraceat0 - Treatment
- ammonia nitrogene1
- Outcome
- spinach leaves N accumulatione1
- Direction
- reverse resulte0
- Qualifier
- at a higher N level in the presence of Pbe0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it will lead to a reverse result at a higher N level in the presence of Pb”
e1“ammonia nitrogen is beneficial to spinach leaves N accumulation”
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 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.
- Association SPAD values correlated well with spinach leaf nitrate concentration.
- Recommendation SPAD could be used to pre-evaluate spinach nitrate concentration and potentially determine harvest time.