The pH effect on sdrption‐desorption and fractions of zinc in phosphate treated soils
作者:
R.J. Xie,
A.F. MacKenzie,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1988)
卷期:
Volume 19,
issue 7-12
页码: 873-886
ISSN:0010-3624
年代: 1988
DOI:10.1080/00103628809367981
出版商: Taylor & Francis Group
关键词: pH;buffer;Zn sorption;Zn desorption;Zn fractions
数据来源: Taylor
摘要:
Zinc sorption‐desorption and Zn fractions in three soils, a Dalhousie clay (DT: Eutric Brunisol), a St Bernard loam (ST: Melanic Brunisol) and an Uplands sand (UT: Ferro‐Humic Podzol), were studied with and without added P at different pH values. Phosphate addition increased Zn sorption (Zns) in the order: DT clay > ST loam > UT sand. A positive correlation was noted between Znsand pH for soils treated with and without P. Phosphate addition reduced Zn desorption (ZnD) especially at low pH and was attributed to P induced pH effect. At high pH values, the P effect was less important. An increase in pH value resulted in less 0.5 M KNO3‐extractable Zn (ZnKNO3) and more 0.5 NaOH‐Zn (ZnNaOH) and HNO3extractable Zn (ZnHNO3). Compared with zero P treatments, P addition reduced ZnKNO3at low pH value but increased ZnNaOHat all pH values.
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