Soil temperature effects on uptake of cadmium and zinc by vegetables grown on sludge-amended soil

Journal Article · Sun Apr 01 04:00:00 EST 1979 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1979.00472425000800020020x· OSTI ID:5759318

Giordano, P M; Mays, D A; Behel, Jr, A D

The effects of soil temperature on the uptake of heavy metals by plants grown on sludge-amended soil has not been established. A field experiment was initiated in 1975 to determine uptake of Cd and Zn by several vegetables from Sango sil amended with 224 metric tons/ha of an anaerobically digested sewage sludge. A variety of commonly grown garden vegetables were selected since many home gardeners have been utilizing digested sewage for its nutrient and soil conditioning value. Soils were heated to approximately 27/sup 0/C using thermostatically controlled resistance cables placed 30 cm deep and 30 cm apart in the soil. Crops were grown in 1975, 1976, and 1977 to measure immediate and residual uptake of heavy metals in edible plant parts. Concentrations of DTPA-extractable metals in soil increased from 1975 to 1977, but these increases were not reflected in higher plant concentrations. Soil heating significantly increased Cd and Zn concentrations in broccoli and potato; concentrations of Cd and Zn were higher in several other vegetables with heating but differences were not statistically significant. Liming reduced the concentration of Zn and Cd in the crops, but dilution due to better growth may have accounted for a part of the reduction. Analyses of soil cores taken after cropping in 1977 indicated movement of Zn and Cd to a maximum depth of 20 to 30 cm.

• Research Organization: TVA, Muscle Shoals, AL
• OSTI ID: 5759318
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 8:2; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ADDITIVES
ANAEROBIC DIGESTION
BIOCONVERSION
CADMIUM
DATA
DATA COMPILATION
DATA FORMS
DIGESTION
ELEMENTS
ENVIRONMENTAL TRANSPORT
FOOD
INFORMATION
MANAGEMENT
MASS TRANSFER
METABOLISM
METALS
NUMERICAL DATA
NUTRIENTS
PLANTS
PROCESSING
SEWAGE
SEWAGE SLUDGE
SOILS
TABLES
TEMPERATURE EFFECTS
UPTAKE
VEGETABLES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
ZINC