Abstract
Abstract Disposal of municipal sludge on cropland raises the question of availability to plants of Cd which is often much more concentrated in sludges compared to native levels in soil. In a greenhouse experiment, Cd added in a factorial design with heated anaerobically digested sewage sludge and Cd acetate as factors was readily available to the soybean plant ( Glycine max L.) where it was translocated to aerial parts, accumulating up to 18 ppm in the mature plant. Incremental additions of sewage sludge tended to depress the Cd levels observed in the mature plant and seed. Cd contents in the plant at harvest and in seed were directly related to soil levels extractable by 0.1/V HCl. Seed levels of about 1.0 ppm Cd produced by application of 144 metric tons/ha of sludge solids were not within toxic limits reported in the literature.
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Claims 4
Claim · model-written summary
Added cadmium was available to soybean and translocated to aerial parts, reaching 18 ppm in mature plants.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- aerial partse0
- Treatment
- Cd addede0
- Outcome
- translocated to aerial partse0
- Value
- 18 ppme0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd added in a factorial design with heated anaerobically digested sewage sludge and Cd acetate as factors was readily available to the soybean plant ( Glycine max L.) where it was translocated to aerial parts, accumulating up to 18 ppm in the mature plant”
Claim · model-written summary
Incremental sewage sludge additions tended to reduce cadmium levels in mature plants and seeds.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- mature plant and seede0
- Treatment
- Incremental additions of sewage sludgee0
- Outcome
- Cd levelse0
- Direction
- depresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incremental additions of sewage sludge tended to depress the Cd levels observed in the mature plant and seed.”
t0“Soybeans”
Claim · model-written summary
Plant and seed cadmium contents were directly related to HCl-extractable soil levels.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- plant at harvest and in seede0
- Outcome
- Cd contentse0
- Comparator
- soil levels extractable by 0.1/V HCle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd contents in the plant at harvest and in seed were directly related to soil levels extractable by 0.1/V HCl.”
t0“Soybeans”
Claim · model-written summary
Application of 144 metric tons/ha sludge solids produced approximately 1.0 ppm cadmium in soybean seed.
- Taxon
- soybeanGlycine maxt0
- Treatment
- application of 144 metric tons/ha of sludge solidse0
- Outcome
- Seed levelse0
- Value
- about 1.0 ppme0
- Qualifier
- not within toxic limits reported in the literaturee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed levels of about 1.0 ppm Cd produced by application of 144 metric tons/ha of sludge solids were not within toxic limits reported in the literature.”
t0“Soybeans”
The same questions in other papers
organic · nutrient: content · Glycine max (soybean)Positive and negative results
14 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- no effect
15 papers more in this group
See all 19 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.