Premium
Mobility of Polyphosphates in Soil
Author(s) -
Hashimoto Isao,
Lehr James R.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700010016x
Subject(s) - ammonium , chemistry , water soluble , phosphate , zoology , environmental chemistry , chromatography , biochemistry , organic chemistry , biology
Ammonium ortho‐, pyro‐, tripoly‐, tetrapoly‐, and long‐chain polyphosphates and cyclic ammonium tri‐ and tetrametaphosphates were surface applied to soil columns. After 1, 2, and 4 weeks the soil columns were sliced into 1‐mm sections and examined for the distribution of P along the columns. Each soil section was analyzed for total and orthophosphate P in both the water‐soluble and the immobilized (NaOH‐extractable) fractions. The general features of the distribution patterns usually were established by the first week, after which soluble P moved much more slowly and the amount of immobilized P increased slowly. The total distance of movement and the distribution patterns of water‐soluble P were similar for all the phosphates tested, but the polyphosphates differend markedly in the degree of immobilization of P and differed significantly in the positions of maximum retention of P in the soil columns. These positions of maximum retention had no apparent relation to the degree of condensation of the polyphosphates.