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Fate of bound methyl parathion residues in soils as affected by agronomic practices
Year:
1985
Source of publication :
Soil Biology and Biochemistry
Authors :
Gerstl, Zev
;
.
Volume :
17
Co-Authors:
Gerstl, Z., Pesticide Degradation Laboratory, U.S. Department of Agriculture, Beltsville, MD 20705, United States
Helling, C.S., Pesticide Degradation Laboratory, U.S. Department of Agriculture, Beltsville, MD 20705, United States
Facilitators :
From page:
667
To page:
673
(
Total pages:
7
)
Abstract:
The fate of [ring-14C]methyl parathion in a silt loam soil was monitored during a 49-day incubation. After this period, 54% of the initial 14C remained in the soil; of this, 13% was soxhletextractable with methanol and 87% was bound residue. Soils were then treated with inorganic and organic amendments and incubated for an additional 70 days. Release of methyl parathion bound residues could not be demonstrated, but both bound and extractable 14C were mineralized to 14CO2, CO2 was evolved slowly and continuously by the controls and where soil was amended with H2SO4, (NH4)2SO4, NH4OH, chitin, oat seedlings or oat straw. Glucose and asparagine caused higher rates of 14CO2 production. HgCl2 gave very high initial rates of 14CO2 loss; the rate declined to that of the control only after 9-10 weeks. The lime treatment exceeded the controls after 1 week, declining only slightly with time. The effects of sewage sludge and dairy manure were similar to the controls except that: sludge caused a very high initial release of 14CO2, and both treatments gave an unaccountable loss of 14C, perhaps as 14CH4 resulting from the formation of anaerobic conditions. By 70 days, amounts of extractable 14C and bound 14C had both declined twice as rapidly in certain soils as in unamended controls. Studies carried out with soxhlet-extracted soils, containing only bound residues, indicated that the soil microflora able to mineralize bound residues without any appreciable buildup of 14C activity in the extractable phase. © 1985.
Note:
Related Files :
Agriculture
nonhuman
parathion
parathion methyl
radioisotope
soil
theoretical study
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More details
DOI :
10.1016/0038-0717(85)90044-6
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
24418
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:07
Scientific Publication
Fate of bound methyl parathion residues in soils as affected by agronomic practices
17
Gerstl, Z., Pesticide Degradation Laboratory, U.S. Department of Agriculture, Beltsville, MD 20705, United States
Helling, C.S., Pesticide Degradation Laboratory, U.S. Department of Agriculture, Beltsville, MD 20705, United States
Fate of bound methyl parathion residues in soils as affected by agronomic practices
The fate of [ring-14C]methyl parathion in a silt loam soil was monitored during a 49-day incubation. After this period, 54% of the initial 14C remained in the soil; of this, 13% was soxhletextractable with methanol and 87% was bound residue. Soils were then treated with inorganic and organic amendments and incubated for an additional 70 days. Release of methyl parathion bound residues could not be demonstrated, but both bound and extractable 14C were mineralized to 14CO2, CO2 was evolved slowly and continuously by the controls and where soil was amended with H2SO4, (NH4)2SO4, NH4OH, chitin, oat seedlings or oat straw. Glucose and asparagine caused higher rates of 14CO2 production. HgCl2 gave very high initial rates of 14CO2 loss; the rate declined to that of the control only after 9-10 weeks. The lime treatment exceeded the controls after 1 week, declining only slightly with time. The effects of sewage sludge and dairy manure were similar to the controls except that: sludge caused a very high initial release of 14CO2, and both treatments gave an unaccountable loss of 14C, perhaps as 14CH4 resulting from the formation of anaerobic conditions. By 70 days, amounts of extractable 14C and bound 14C had both declined twice as rapidly in certain soils as in unamended controls. Studies carried out with soxhlet-extracted soils, containing only bound residues, indicated that the soil microflora able to mineralize bound residues without any appreciable buildup of 14C activity in the extractable phase. © 1985.
Scientific Publication
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