Abstract
Abstract Chelated Fe fertilizer (FeEDDHA) was irradiated and applied . at five rates to three soils classified as Lake Charles clay (C), Zapata clay loam (CL), and Edna sandy loam (SL). Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse. Plant 59Fe concentration, uptake, fertilizer efficiency and magnitude of Fe fertilizer fixation were studied independently from indigenous Fe. The clay and sandy loam soils had exhibited occasional Fe deficiency problems, whereas, the clay loam soil caused extremely severe Fe chlorosis. In this clay loam soil, correction of Fe chlorosis with FeEDDHA was nil. The concentration of 59Fe in plants was determined using a Ge‐Li detector, and the total Fe (indigenous + 59Fe) by atomic absorption spectrophotometry, while the indigenous Fe was calculated by difference. The 59Fe concentration and uptake in the plants increased with applied rates regardless of soil type. Second crop plants had less 59Fe than the first crop at all Fe levels. Sorghum plants absorbed similar amounts of total Fe (Fe + 59Fe) per unit weight of dry matter regardless of soil type or Fe rate. 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. Indigenous Fe concentrations in plants ranged as high as 400 fold that of 59Fe taken up from applied fertilizer. Maximum 59Fe fertilizer efficiency (% plant recovery) was 1.2%. Very low amounts of DTPA extractable 59Fe were obtained from the different soils indicating that the greater portion of applied Fe was fixed. Although rather high rates of soil applied Fe are often required to correct Fe chlorosis, small applications strikingly stimulate uptake of indigenous Fe and plant growth response.
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Claims 11
Claim · model-written summary
The 59Fe concentration and uptake in sorghum increased with applied Fe rates
- Taxon
- Sorghum bicolor
Sorghum bicolore2 - Treatment
- applied ratese1
- Outcome
- 59Fe concentration and uptakee1
- Direction
- increasede1
- Setting
- greenhousee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e1“The 59Fe concentration and uptake in the plants increased with applied rates regardless of soil type”
Claim · model-written summary
Second crop plants had less 59Fe than the first crop
- Taxon
- Sorghum bicolorSorghum bicolore2
- Outcome
- 59Fee3
- Direction
- lesse3
- Comparator
- first crope3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e3“Second crop plants had less 59Fe than the first crop at all Fe levels”
Claim · model-written summary
Sorghum absorbed similar total Fe per unit dry matter regardless of soil type or Fe rate
- Taxon
- Sorghum bicolorSorghum bicolore2
- Outcome
- total Fe (Fe + 59Fe) per unit weight of dry mattere4
- Qualifier
- regardless of soil type or Fe ratee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e4“Sorghum plants absorbed similar amounts of total Fe (Fe + 59Fe) per unit weight of dry matter regardless of soil type or Fe rate”
Claim · model-written summary
Fe fertilization enhanced indigenous Fe uptake
- Taxon
- Sorghum bicolorSorghum bicolore2
- Treatment
- Fe fertilizatione5
- Outcome
- Indigenous Fe uptakee5
- Direction
- enhancede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e5“Indigenous Fe uptake was enhanced by Fe fertilization”
Claim · model-written summary
Plants grown in Fe treated soils had 2 fold greater indigenous Fe concentrations than controls
- Taxon
- Sorghum bicolorSorghum bicolore2
- Treatment
- Fe treated soilse6
- Outcome
- indigenous Fe concentrationse6
- Direction
- greatere6
- Value
- 2 folde6
- Comparator
- controlse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e6“Plants grown in Fe treated soils had 2 fold greater indigenous Fe concentrations than those in the controls”
Claim · model-written summary
Indigenous Fe concentrations in sorghum ranged as high as 400 fold the 59Fe taken up from applied fertilizer
- Taxon
- Sorghum bicolorSorghum bicolore2
- Outcome
- Indigenous Fe concentrations in plantse7
- Value
- 400 folde7
- Qualifier
- ranged as high ase7
- Comparator
- 59Fe taken up from applied fertilizere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e7“Indigenous Fe concentrations in plants ranged as high as 400 fold that of 59Fe taken up from applied fertilizer”
Claim · model-written summary
Maximum 59Fe fertilizer efficiency was 1.2%
- Taxon
- Sorghum bicolorSorghum bicolore2
- Outcome
- 59Fe fertilizer efficiency (% plant recovery)e3
- Value
- 1.2%e3
- Qualifier
- Maximume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e3“Maximum 59Fe fertilizer efficiency (% plant recovery) was 1.2%”
Claim · model-written summary
Very low amounts of DTPA extractable 59Fe were obtained from the soils
- Taxon
- Sorghum bicolorSorghum bicolore2
- Outcome
- DTPA extractable 59Fee4
- Qualifier
- Very low amountse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e4“Very low amounts of DTPA extractable 59Fe were obtained from the different soils indicating that the greater portion of applied Fe was fixed”
Claim · model-written summary
The greater portion of applied Fe was fixed in the soil
- Taxon
- Sorghum bicolorSorghum bicolore2
- Outcome
- DTPA extractable 59Fee4
- Qualifier
- the greater portion of applied Fe was fixede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e4“Very low amounts of DTPA extractable 59Fe were obtained from the different soils indicating that the greater portion of applied Fe was fixed”
Claim · model-written summary
Small Fe applications stimulated indigenous Fe uptake and plant growth response
- Taxon
- Sorghum bicolorSorghum bicolore2
- Treatment
- small applicationse4
- Outcome
- uptake of indigenous Fe and plant growth responsee4
- Direction
- stimulatee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e4“small applications strikingly stimulate uptake of indigenous Fe and plant growth response”
Claim · model-written summary
FeEDDHA did not correct Fe chlorosis in the clay loam soil
- Taxon
- Sorghum bicolorSorghum bicolore2
- Treatment
- FeEDDHAe4
- Outcome
- correction of Fe chlorosise4
- Direction
- nile4
- Setting
- clay loam soile4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Sorghum (Sorghum bicolor L. Moench) plants were grown in a greenhouse”
e4“In this clay loam soil, correction of Fe chlorosis with FeEDDHA was nil”
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See all 21 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.