Abstract
While it is known that superoptimal concentrations of the nitrate (NO3-) ion in solution culture do not increase NO3- uptake or dry matter accumulation, the same is not known for the ammonium (NH4+) ion. An experiment was conducted utilizing flowing solution culture with pH control to investigate the influence of superoptimal NH4+ concentrations on dry matter, nitrogen (N), potassium (K), calcium (Ca), and magnesium (Mg) accumulation by nonnodulated soybean plants. Increasing the NH4+ concentration in solution from 1 to 10 mM did not affect dry matter or N accumulation. Accumulations of K, Ca, and Mg were slightly decreased with increased NH4+ concentration. The NH4+ uptake system, which is saturated at less than 1mM NH4+, is able to regulate uptake of NH4+ at concentrations as high as 10 mM.
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Claims 4
Claim · model-written summary
Increasing ammonium from 1 to 10 mM did not change soybean dry matter accumulation.
- Taxon
- soybean
Glycine maxe1 - Treatment
- NH4+ concentration in solution from 1 to 10 mMe0
- Outcome
- dry mattere0
- Direction
- did not affecte0
- Comparator
- 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the NH4+ concentration in solution from 1 to 10 mM did not affect dry matter or N accumulation”
e1“nonnodulated soybean plants”
Claim · model-written summary
Increasing ammonium from 1 to 10 mM did not change soybean N accumulation.
- Taxon
- soybeanGlycine maxe1
- Treatment
- NH4+ concentration in solution from 1 to 10 mMe0
- Outcome
- N accumulatione0
- Direction
- did not affecte0
- Comparator
- 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the NH4+ concentration in solution from 1 to 10 mM did not affect dry matter or N accumulation”
e1“nonnodulated soybean plants”
Claim · model-written summary
Increasing ammonium slightly decreased soybean K, Ca, and Mg accumulation.
- Taxon
- soybeanGlycine maxe1
- Treatment
- increased NH4+ concentratione0
- Outcome
- Accumulations of K, Ca, and Mge0
- Direction
- decreasede0
- Qualifier
- slightlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accumulations of K, Ca, and Mg were slightly decreased with increased NH4+ concentration”
e1“nonnodulated soybean plants”
Claim · model-written summary
Soybean ammonium uptake remained regulated at concentrations as high as 10 mM.
- Taxon
- soybeanGlycine maxe1
- Outcome
- regulate uptake of NH4+e0
- Qualifier
- at concentrations as high as 10 mMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NH4+ uptake system, which is saturated at less than 1mM NH4+, is able to regulate uptake of NH4+ at concentrations as high as 10 mM”
e1“nonnodulated soybean plants”
The same questions in other papers
ammonium · growth · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- negative
ammonium · nutrient: content · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.