Abstract
Abstract The influence of delayed inoculation on N2(C2H2)‐fixation by Phaseolus vulgaris L. grown in minesoil is described. Fertilizer treatments included in the study were 0, 25, 50, and 100 kg N/ha applied at 21 days or at seeding. A peat culture of Rhizobium phaseoli was inoculated at 21 days or at seeding. Nitrogenase activity was determined by reduction of C2H2 to C2H4, at 7, 21, 35, and 49 days. Nitrogenase activity was related to N‐fertilizer rate and treatment sequence. Addition of 25 kg N/ha significantly stimulated N2(C2H2)‐ fixation while greater rates of N‐fertilizer decreased the rate of Ng(C2H2)‐fixation. The results of this study suggest that addition of 25 kg N/ha at time of seeding, followed by inoculation with R. phaseoli after legume growth has been established (21 days) results in an initial greater amount of N2(C2H2)‐fixation.
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Claims 4
Claim · model-written summary
Nitrogenase activity depended on fertilizer rate and treatment sequence.
- Taxon
- Phaseolus vulgaris L.
Phaseolus vulgarist0 - Treatment
- N‐fertilizer rate and treatment sequencee0
- Outcome
- Nitrogenase activitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogenase activity was related to N‐fertilizer rate and treatment sequence.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Adding 25 kg N/ha significantly stimulated nitrogen fixation.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- 25 kg N/hae0
- Outcome
- N2(C2H2)‐ fixatione0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of 25 kg N/ha significantly stimulated N2(C2H2)‐ fixation”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Higher nitrogen fertilizer rates decreased fixation.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- greater rates of N‐fertilizere0
- Outcome
- rate of Ng(C2H2)‐fixatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater rates of N‐fertilizer decreased the rate of Ng(C2H2)‐fixation”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
The authors suggest that 25 kg N/ha at seeding followed by inoculation at 21 days initially increases fixation.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Interactor
- R. phaseoliRhizobium phaseolie0symbiont
- Outcome
- addition of 25 kg N/ha at time of seeding, followed by inoculation with R. phaseoli after legume growth has been established (21 days)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“addition of 25 kg N/ha at time of seeding, followed by inoculation with R. phaseoli after legume growth has been established (21 days) results in an initial greater amount of N2(C2H2)‐fixation”
t0“Phaseolus vulgaris L.”
The same questions in other papers
nitrogen · molecular: metabolites · Phaseolus vulgaris (common bean)Results differ
2 papers in the same direction as this paper · 8 in the opposite direction
- negative
- no effect
- no effect
7 papers more in this group
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.