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Effect of Seaweed on Phosphorus Availability of a Soil Derived from Volcanic Ash 1
Author(s) -
Zunino H.,
Peirano P.,
Aguilera M.,
Gonzalez R.,
Caiozzi M.
Publication year - 1971
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1971.00021962006300010036x
Subject(s) - alginic acid , algae , phosphorus , chemistry , volcanic ash , agronomy , environmental chemistry , fixation (population genetics) , volcano , botany , biology , geology , geochemistry , organic chemistry , biochemistry , gene
A volcanic ash‐derived soil was incubated up to 93 days with different amounts of seaweed. P was then extracted using an anion exchange resin method, and it was found that extractable P increased with increasing amounts of seaweed, which was added in proportions of .1, .5, 1.5, and 4.0%. Radishes grown in the same soilseaweed mixtures absorbed more P than from the control and increased their yield with the increase of seaweed. On adding seaweed and KH 2 PO 4 simultaneously to the soil, an interaction between seaweed, soil and KH 2 PO 4 occurs which results, at .1 and .5% of seaweed, in a decrease in P fixation. This could be due to the presence of alginates and alginic acids in the seaweed, since these compounds could be binding exchangeable Ca of the soil and therefore diminish P fixation by the Ca‐bonding mechanism.