Claim · model-written summary
Applying 200 kg nitrogen fertilizer per hectare gave no further yield gain.
- Taxon
- soybean
Glycine maxt0 - Treatment
- 200 kg of N fertilizer ha -1e0
- Outcome
- yielde0
- Direction
- no further gainse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 200 kg of N fertilizer ha -1 drastically decreased nodulation and the contribution of BNF (to 44%), with no further gains in yield.”
t0“soybean”
Title
Mariangela Hungria; Julio C Franchini; Rubens J Campo; et al. Canadian Journal of Plant Science 2006. doi:10.4141/p05-098
Other claims from this paper (12)
- Intervention effect Reinoculation raised the estimated biological nitrogen fixation contribution from 79% to 84%.
- Intervention effect Reinoculation increased grain yield by an average 127 kg ha -1 or 4.7%.
- Intervention effect Reinoculation increased total grain nitrogen by an average 6.6%.
- Intervention effect Applying 200 kg of nitrogen fertilizer per hectare drastically decreased nodulation and BNF contribution to 44%.
- Intervention effect Starter nitrogen at sowing slightly decreased nodulation and BNF contribution.
- Intervention effect Starter nitrogen at sowing did not increase yield.
- Intervention effect Nitrogen applied at R2 and R4 decreased BNF contribution to 77%.
- Intervention effect Nitrogen applied at R2 and R4 also decreased yield.
- Observation Estimated ammonia volatilization was 15–25% of applied nitrogen fertilizer.
- Observation Nitrogen fertilizer showed no residual benefits in the winter crop.
- Recommendation The authors conclude replacing nitrogen fertilizer with inoculation has economic and environmental benefits in Brazil.
- Recommendation The authors support reinoculation even in soils with high Bradyrhizobium populations.