Zinc, copper, and nickel availabilities as determined by soil solution and DTPA extraction of a sludge‐amended soil
作者:
J. F. Adams,
D. E. Kissel,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1989)
卷期:
Volume 20,
issue 1-2
页码: 139-158
ISSN:0010-3624
年代: 1989
DOI:10.1080/00103628909368074
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Extracting sludge‐amended soil with DTPA does not always give a reliable measure of plant‐available heavy metals. The major purpose of this greenhouse pot study was to help explain why. Two anaerobically digested sludges from sewages treated with either Ca(OH)2or FeCl3were applied to 3‐kg samples of a Mollic Albaqualf previously limed with Ca(OH)2rates of 0, 2.5, and 10g/pot that resulted in pHs in the check pots of 5.4, 6.2, or 7.7 after the first harvest. Sludge rates provided 0, 200, 40, 800, and 1600 mg Zn kg‐1of soil. Two consecutive crops of soybeans (Glycine MaxL.) were grown for 42 d each in the greenhouse. DTPA‐extractable, soil‐solution, and plant concentrations of Cu2+, Ni2+, and Zn2+were measured.
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