Claim · model-written summary
Nitrogen source did not significantly affect soybean total N accumulation except under sole ammonium at pH 4.5.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- N-sourcee1
- Outcome
- total N accumulatione1
- Direction
- not significantly affectede1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean plants (Glycine max [L.] Merr. cv Ransom)”
e1“Dry matter and total N accumulation of the plants was not significantly affected by N-source at any of the pH levels except for decreases in these parameters in plants supplied solely with NH4+ at pH 4.5.”
Title
Root‐zone acidity affects relative uptake of nitrate and ammonium from mixed nitrogen sources
J. Kevin Vessey; Leslie T. Henry; Sylvain Chaillou; et al. Journal of Plant Nutrition 1990. doi:10.1080/01904169009364061
Other claims from this paper (10)
- Intervention effect Nitrogen source did not significantly affect soybean dry matter except under sole ammonium at pH 4.5.
- Intervention effect Sole ammonium at pH 4.5 decreased soybean dry matter.
- Intervention effect Sole ammonium at pH 4.5 decreased soybean total N accumulation.
- Association A greater ammonium proportion increased soybean shoot-to-root ratios at all pH levels.
- Association The absorbed proportion of each nitrogen ion increased with its proportion in solution at every pH.
- Observation In mixed nitrogen solution at pH 6.0, soybean absorbed ammonium over nitrate at a 2:1 ratio.
- Association Declining root-zone pH decreased soybean ammonium uptake.
- Association Declining root-zone pH increased soybean nitrate uptake.
- Association The soybean ammonium-to-nitrate uptake ratio declined as root-zone pH decreased.
- Mechanism Authors hypothesized that low pH inhibits ammonium-dependent soybean growth through reduced ammonium uptake and nitrogen stress.