Abstract
Abstract Several studies have identified drought stress as having particularly deleterious effects on symbiotic nitrogen fixation activity in soybean. Potassium is important in the growth of soybean and an important ion in the physiology of plant water relations. Therefore, this study was undertaken to examine the interactive effects of various levels of potassium and water in the soil on the nitrogen fixation activity of soybean. The experiment was done under greenhouse conditions to provide the plants with well‐defined levels of potassium and to control the soil water availability. No difference in vegetative growth or acetylene reductions rates was detected among the potassium treatments. However, seed yield showed an optimum for the middle potassium treatment (50 mg K2O/kg soil) and the total accumulated nitrogen was lowest for the highest potassium treatment. As expected, dramatic differences as a result of the drought treatments were detected in nitrogen fixation rates and plant growth. Overall, there was little effect of potassium treatment on the nitrogen fixation activity of soybean under drought.
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Claims 5
Claim · model-written summary
Potassium treatments showed no detected difference in soybean vegetative growth or acetylene reduction rates.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- potassium treatmentse0
- Outcome
- vegetative growth or acetylene reductions ratese0
- Direction
- No differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“No difference in vegetative growth or acetylene reductions rates was detected among the potassium treatments.”
Claim · model-written summary
Soybean seed yield was optimal at the middle potassium treatment of 50 mg K2O/kg soil.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- middle potassium treatment (50 mg K2O/kg soil)e0
- Outcome
- seed yielde0
- Direction
- optimume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“seed yield showed an optimum for the middle potassium treatment (50 mg K2O/kg soil)”
Claim · model-written summary
Total accumulated nitrogen was lowest with the highest potassium treatment.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- highest potassium treatmente0
- Outcome
- total accumulated nitrogene0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“the total accumulated nitrogen was lowest for the highest potassium treatment.”
Claim · model-written summary
Drought treatments produced dramatic differences in soybean nitrogen fixation rates and plant growth.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- drought treatmentse0
- Outcome
- nitrogen fixation rates and plant growthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“dramatic differences as a result of the drought treatments were detected in nitrogen fixation rates and plant growth.”
Claim · model-written summary
Potassium treatment had little effect on soybean nitrogen fixation activity under drought.
- Taxon
- soybeanGlycine maxe0
- Treatment
- potassium treatmente0
- Outcome
- nitrogen fixation activitye0
- Direction
- little effecte0
- Qualifier
- under droughte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was little effect of potassium treatment on the nitrogen fixation activity of soybean under drought.”
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See all 11 papers →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.