Abstract
Abstract The uptake and distribution of manganese (Mn) in field‐grown maize (Zea mays L.) was studied in a long‐term sewage sludge field trial on an acid sandy soil at Bordeaux. Since 1974, sewage sludge had been applied at levels of 101 dry matter (DM) ha‐1 year‐1 (SS 10) and 1001 DM ha‐1 per 2 years (SS 100) on annually cropped maize plots. Treatment with farmyard manure (FYM) at a rate of 10 t DM ha‐1 year‐1 served as unpolluted control. Five replicate plants per treatment were examined at six different growth stages. At each stage, the whole plant was separated into its different organs and the Mn distribution was determined in at least 12 different plant parts. Manganese concentrations were always higher in SS 100 plants compared to FYM and SS 10 treated plants. Significant treatment‐dependent differences occurred almost all in the roots and in the different leaf levels while we found similar Mn concentrations in the stalk and in the reproductive organs. In the different stalk levels and in the ear composites we determined low Mn concentrations with critical deficiency values in FYM and SS 10 plants while Mn concentrations in SS 100 plants were in the normal range. Soil treatment also significantly influenced the initial absorption by the roots. Despite low absolute Mn concentrations in the roots of FYM plants, the Mn transfer coefficient (plant Mn concentration/soil Mn concentration) was highest in FYM plants and lowest in SS 100 plants indicating a relatively low Mn plant availability in the sludge‐treated plots.
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Claims 7
Claim · model-written summary
Maize plants receiving SS 100 had higher Mn concentrations than plants receiving FYM or SS 10.
- Treatment
- SS 100e1
- Outcome
- Manganese concentrationse1
- Direction
- highere1
- Comparator
- FYM and SS 10 treated plantse1
- Setting
- Bordeauxe0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e0“The uptake and distribution of manganese (Mn) in field‐grown maize (Zea mays L.) was studied in a long‐term sewage sludge field trial on an acid sandy soil at Bordeaux”
e1“Manganese concentrations were always higher in SS 100 plants compared to FYM and SS 10 treated plants”
Claim · model-written summary
Mn concentrations in the stalk levels and ear composites were low, at critical deficiency values, in FYM and SS 10 plants.
- Organ / stage
- stalk levels and in the ear compositese3
- Treatment
- FYM and SS 10e3
- Outcome
- Mn concentrationse3
- Direction
- lowe3
- Qualifier
- critical deficiency valuese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e3“In the different stalk levels and in the ear composites we determined low Mn concentrations with critical deficiency values in FYM and SS 10 plants”
Claim · model-written summary
Treatment-dependent differences in Mn concentrations were significant in the roots and the different leaf levels.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e2“Significant treatment‐dependent differences occurred almost all in the roots and in the different leaf levels”
Claim · model-written summary
Mn concentrations in the stalk and reproductive organs were similar across treatments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e2“we found similar Mn concentrations in the stalk and in the reproductive organs”
Claim · model-written summary
Soil treatment significantly influenced the initial absorption of Mn by the roots.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e4“Soil treatment also significantly influenced the initial absorption by the roots”
Claim · model-written summary
The Mn transfer coefficient was highest in FYM plants and lowest in SS 100 plants.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e5“the Mn transfer coefficient (plant Mn concentration/soil Mn concentration) was highest in FYM plants and lowest in SS 100 plants”
Claim · model-written summary
The lower Mn transfer coefficient suggests relatively low Mn plant availability in the sludge-treated plots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Distribution of sludge‐borne manganese in field‐grown maize”
e5“indicating a relatively low Mn plant availability in the sludge‐treated plots”