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Effects of trace elements on urease activity in soils

Abstract

Disposal of sewage sludges and effluents on agricultural land is becoming a widespread practice. Most sludge samples disposed on soils contain large quantities of various trace elements. Studies of 20 trace elements commonly found in sludge samples showed that they inhibit the activity of urease in soils and that their order of effectiveness as inhibitors of urease depends on the soil. When the trace elements were compared by using 5 ..mu..mol . g/sup -1/ soil, however, some of them showed the same order of effectiveness as urease inhibitors in the six soils studied i.e., for the monovalent and divalent ions. Ag/sup +/ greater than or equal to Hg/sup 2 +/ > Cu/sup 2 +/ > Cd/sup 2 +/ > Zn/sup 2 +/ > Sn/sup 2 +/ > Mn/sup 2 +/, and generally, Fe/sup 3 +/ > Fe/sup 2 +/ and Cu/sup 2 +/ > Cu/sup +/. Other trace element ions that inhibited urease were Ni/sup 2 +/, Co/sup 2 +/, Pb/sup 2 +/, Ba/sup 2 +/, As/sup 3 +/, B/sup 3 +/, Cr/sup 3 +/, Al/sup 3 +/, V/sup 4 +/, Se/sup 4 +/, and Mo/sup 6 +/. Of the trace element ions studied, only As/sup 5 +/ and W/sup  More>>
Authors:
Publication Date:
Jan 01, 1977
Product Type:
Journal Article
Reference Number:
ERA-02-046290; EDB-77-121598
Resource Relation:
Journal Name: Soil Biol. Biochem.; (United Kingdom); Journal Volume: 9:7
Subject:
54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; ELEMENTS; BIOLOGICAL EFFECTS; AGRICULTURE; ALUMINIUM; ARSENIC; BARIUM; BORON; CADMIUM; CHROMIUM; COPPER; IRON; LEAD; LIQUID WASTES; MANGANESE; MERCURY; NICKEL; SELENIUM; SEWAGE SLUDGE; SILVER; TIN; TRACE AMOUNTS; VANADIUM; WASTE DISPOSAL; ZINC; ALKALINE EARTH METALS; MANAGEMENT; METALS; SEMIMETALS; SEWAGE; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTES; 510200* - Environment, Terrestrial- Chemicals Monitoring & Transport- (-1989); 550200 - Biochemistry
OSTI ID:
7143084
Research Organizations:
Iowa State Univ., Ames
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: SBIOA
Submitting Site:
TIC
Size:
Pages: 9-13
Announcement Date:

Citation Formats

Tabatabai, M A. Effects of trace elements on urease activity in soils. United Kingdom: N. p., 1977. Web. doi:10.1016/0038-0717(77)90054-2.
Tabatabai, M A. Effects of trace elements on urease activity in soils. United Kingdom. doi:10.1016/0038-0717(77)90054-2.
Tabatabai, M A. 1977. "Effects of trace elements on urease activity in soils." United Kingdom. doi:10.1016/0038-0717(77)90054-2. https://www.osti.gov/servlets/purl/10.1016/0038-0717(77)90054-2.
@misc{etde_7143084,
title = {Effects of trace elements on urease activity in soils}
author = {Tabatabai, M A}
abstractNote = {Disposal of sewage sludges and effluents on agricultural land is becoming a widespread practice. Most sludge samples disposed on soils contain large quantities of various trace elements. Studies of 20 trace elements commonly found in sludge samples showed that they inhibit the activity of urease in soils and that their order of effectiveness as inhibitors of urease depends on the soil. When the trace elements were compared by using 5 ..mu..mol . g/sup -1/ soil, however, some of them showed the same order of effectiveness as urease inhibitors in the six soils studied i.e., for the monovalent and divalent ions. Ag/sup +/ greater than or equal to Hg/sup 2 +/ > Cu/sup 2 +/ > Cd/sup 2 +/ > Zn/sup 2 +/ > Sn/sup 2 +/ > Mn/sup 2 +/, and generally, Fe/sup 3 +/ > Fe/sup 2 +/ and Cu/sup 2 +/ > Cu/sup +/. Other trace element ions that inhibited urease were Ni/sup 2 +/, Co/sup 2 +/, Pb/sup 2 +/, Ba/sup 2 +/, As/sup 3 +/, B/sup 3 +/, Cr/sup 3 +/, Al/sup 3 +/, V/sup 4 +/, Se/sup 4 +/, and Mo/sup 6 +/. Of the trace element ions studied, only As/sup 5 +/ and W/sup 6 +/ did not inhibit urease activity in soils. Studies on the distribution of urease activity showed that it is concentrated in surface soils and decreases with depth. Urease activity was proportional to organic C distribution in each soil profile and was significantly correlated with organic C in the surface soils studied.}
doi = {10.1016/0038-0717(77)90054-2}
journal = {Soil Biol. Biochem.; (United Kingdom)}
volume = {9:7}
journal type = {AC}
place = {United Kingdom}
year = {1977}
month = {Jan}
}