Abstract
Abstract Plant Fe concentration and uptake of indigenous soil Fe from three soils ranging in Fe deficiency from moderate to severe occurrence were studied. Each soil was treated with 5 rates of 3 different Fe fertilizers (Fe‐EDDHA, FeSO4, and powdered metallic Fe). Separation of the plant Fe derived from indigenous vs applied Fe was facilitated by irradiating the applied Fe fertilizers. A Ge‐Li detector was used in determining 59Fe. Atomic absorption spectrophotometry was used to determine total Fe (indigenous + 59Fe). Indigenous Fe was calculated by difference. Sorghum plants absorbed similar amounts of total Fe (Fe + 59Fe) per unit weight of dry matter, regardless of soil type, Fe rate or Fe source. Indigenous Fe uptake was enhanced by Fe fertilization. Plants grown in Fe treated soils had 2‐fold greater indigenous Fe concentrations than those in the controls. Plant concentrations of indigenous Fe were as much as 1,000‐fold that of applied 59Fe in plants. Root contact is suggested as probably the main mechanism of Fe uptake, especially from indigenous Fe, unstable inorganic Fe sources, and organic sources with low affinity to Fe. Plant growth and alleviation of chlorosis may depend on the utilization of both indigenous and fertilizer Fe since the applied Fe seems to stimulate uptake of indigenous Fe.
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Claims 6
Claim · model-written summary
Sorghum absorbed similar total iron per dry matter across soil types, iron rates and sources.
- Outcome
- total Fe (Fe + 59Fe) per unit weight of dry mattere0
- Direction
- similar amountse0
- Qualifier
- regardless of soil type, Fe rate or Fe sourcee0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum plants”
e0“Sorghum plants absorbed similar amounts of total Fe (Fe + 59Fe) per unit weight of dry matter, regardless of soil type, Fe rate or Fe source.”
Claim · model-written summary
Iron fertilization enhanced uptake of indigenous iron by sorghum.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum plants”
e0“Indigenous Fe uptake was enhanced by Fe fertilization.”
Claim · model-written summary
Sorghum in iron-treated soils had twice the indigenous iron concentration of controls.
- Treatment
- Fe treated soilse0
- Outcome
- indigenous Fe concentrationse0
- Direction
- greatere0
- Value
- 2‐folde0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum plants”
e0“Plants grown in Fe treated soils had 2‐fold greater indigenous Fe concentrations than those in the controls.”
Claim · model-written summary
Indigenous iron concentration in sorghum reached up to 1,000 times applied 59Fe concentration.
- Outcome
- Plant concentrations of indigenous Fee0
- Direction
- as much ase0
- Value
- 1,000‐folde0
- Comparator
- applied 59Fee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum plants”
e0“Plant concentrations of indigenous Fe were as much as 1,000‐fold that of applied 59Fe in plants.”
Claim · model-written summary
Authors suggest root contact is probably the main iron uptake mechanism, especially for indigenous iron and unstable or weakly bound sources.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum plants”
e0“Root contact is suggested as probably the main mechanism of Fe uptake, especially from indigenous Fe, unstable inorganic Fe sources, and organic sources with low affinity to Fe.”
Claim · model-written summary
Authors suggest growth and chlorosis relief may depend on both indigenous and fertilizer iron because applied iron appears to stimulate indigenous iron uptake.
- Outcome
- Plant growth and alleviation of chlorosise0
- Qualifier
- utilization of both indigenous and fertilizer Fee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum plants”
e0“Plant growth and alleviation of chlorosis may depend on the utilization of both indigenous and fertilizer Fe since the applied Fe seems to stimulate uptake of indigenous Fe.”
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See all 118 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.