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Bioavailability of Copper, Manganese, and Zinc in Poultry Litter
Author(s) -
Watt H. v. H.,
Sumner M. E.,
Cabrera M. L.
Publication year - 1994
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1994.00472425002300010008x
Subject(s) - poultry litter , chemistry , environmental chemistry , bioavailability , manganese , soil water , calcareous , zinc , ammonium bicarbonate , copper , ammonium , zoology , agronomy , nutrient , environmental science , botany , biology , soil science , raw material , bioinformatics , organic chemistry
Poultry litter is a useful agricultural by‐product but its potential for environmental pollution requires clarification. A poultry litter from north Georgia containing 1196, 944, and 631 mg/kg Cu, Mn, and Zn respectively was used to study the bioavailability of these metals in a short‐term greenhouse pot experiment. Metal uptake from poultry litter applications equivalent to 0, 15, 30, and 60 Mg/ha were compared on pure quartz sand and Cecil (clayey, kaolinitic, thermic Typic Kanhapludult) and Lakeland (thermic, coated Typic Quartzipsamment) soils at soil pH regimes of ≈5 and 7. Sudax [ Sorghum bicolor (L.) Moench)] was used as test crop for metal uptake from 1 kg of soil during a 21‐d growth period. For the litter treatments, the Cu, Mn, and Zn concentrations were in the ranges 5 to 15, 62 to 1933, and 19 to 55 mg/kg. The Cu and Zn plant concentrations were in the normal range, while toxic Mn concentrations (>400 mg/kg) were found only in the case of the more clayey Cecil soil where reducing conditions in the pots may have been responsible for excessive solubilization of Mn. Soil pH was important in determining both ammonium bicarbonate‐DTPA and 0.1 M NaNO 3 extractable soil Cu, Mn, and Zn. Significant ( P < 0.01) correlations were found between soil Cu, Mn, and Zn extracted by these extractants and plant uptake, while inclusion of soil pH improved the significance of the regressions. Analyses of field soils revealed the build‐up of possible toxic levels of Cu, Mn, and Zn in only one soil which had received 6 Mg/ha of poultry litter per annum for 16 yr.