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Abstract

 

This article in SSSAJ

  1. Vol. 41 No. 1, p. 143-144
     
    Received: June 6, 1975
    Accepted: Sept 29, 1976


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doi:10.2136/sssaj1977.03615995004100010039x

A Centrifugal Filtration Method for Isolating Rhizocylinder Solution1

  1. Y. K. Soon and
  2. M. H. Miller2

Abstract

Abstract

To measure the phosphate concentration in the soil solution adjacent to plant roots, a method of isolating the rhizocylinder solution was developed. A major factor in the choice of a method is that it should be rapid and should not alter the solution salt concentration during isolation. The centrifugal filtration method satisfies both conditions for bulk soil samples; it was subsequently applied to the rhizocylinder (roots plus adhering soil). Root sap leaking from corn (Zea mays. L) roots during centrifugation introduced a significant error in the rhizocylinder solution phosphate concentration for a sandy loam with a low solution phosphorus concentration. For two medium-textured soils with a higher solution P concentration, the error was negligible. The method is considered suitable for the latter soils.

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