Claim · model-written summary
Leaf photosynthesis correlated positively with leaf N.
- Taxon
- soybean
Glycine maxt0 - Organ / stage
- leafe0
- Outcome
- Leaf Pge0
- Direction
- positively correlatede0
- Value
- r = 0.87e0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf Pg was positively correlated with N (r = 0.87) and approached zero at approximately 1.75% N, a concentration similar to that of senesced, recently abscised leaves.”
t0“Soybeans”
Title
Effect of Foliar Fertilization on Photosynthesis, Leaf Nutrition, and Yield of Soybeans1
K. J. Boote; R. N. Gallaher; W. K. Robertson; et al. Agronomy Journal 1978. doi:10.2134/agronj1978.00021962007000050022x
Other claims from this paper (14)
- Intervention effect Foliar fertilization increased canopy leaf N concentration from 3.28 to 3.48%.
- Intervention effect Foliar fertilization increased canopy leaf P concentration from 0.24 to 0.29%.
- Intervention effect Foliar fertilization increased canopy leaf K concentration from 0.92 to 1.32%.
- Intervention effect Foliar fertilization significantly increased upper leaf photosynthesis only on two late sample dates.
- Intervention effect Foliar fertilization did not significantly affect seed yield.
- Intervention effect Foliar fertilization did not extend photosynthesis duration.
- Intervention effect Foliar fertilization did not delay maturity.
- Observation Treated soybean yielded 3617 kg/ha versus 3825 kg/ha in controls.
- Observation Leaf photosynthesis and leaf N and P concentrations decreased through seed filling to maturity.
- Observation Leaf K did not decline during seed filling.
- Association Leaf photosynthesis approached zero at about 1.75% N.
- Association Maximum leaf photosynthesis was predicted at 4.6 to 6.0% leaf N.
- Association Leaf photosynthesis and leaf P percentage correlated positively.
- Recommendation The authors propose using the leaf photosynthesis–N relationship to model decline during seed filling.