Kinetics of soil phosphate desorption as affected by citric acid
作者:
Jörg Gerke,
期刊:
Zeitschrift für Pflanzenernährung und Bodenkunde
(WILEY Available online 1994)
卷期:
Volume 157,
issue 1
页码: 17-22
ISSN:0044-3263
年代: 1994
DOI:10.1002/jpln.19941570104
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractCitrate can accumulate in the rhizosphere of phosphate (P) deficient plants. Therefore, P desorption was investigated in relation to citrate concentrations applied in a single or sequential mode to a Luvisol and a Podzol. Cumulative P desorption increased up to 20 times that of the control, the absolute increase being higher in the Podzol. The rate of P release was closely related to the rate of Fe+Al release indicating that desorption originated mainly from Fe/Al associated P. The mode of citrate loading affected the P desorption in an ambiguous manner. P‐diffusion coefficients were calculated from the desorption data. The coefficients strongly increased with citrate loading, the increase being more pronounced in the Podzo
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