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This article in CS

  1. Vol. 34 No. 1, p. 292-295
     
    Received: Oct 30, 1992


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doi:10.2135/cropsci1994.0011183X003400010054x

Simulating Natural Drainage under Turfgrass in Chemical Fate Studies

  1. Garald L. Horst ,
  2. William L. Powers,
  3. Daniel R. Miller,
  4. Patrick J. Shea and
  5. Eric A. Wicklund
  1. Dep. of Horticulture
    Dep. of Agronomy, Univ. of Nebraska, Lincoln, NE 68583

Abstract

Abstract

Simulation of field conditions is important when conducting solute movement research in the greenhouse. A study was initiated to develop and test a solute movement system with intact turf-soil columns subjected to suction approximating field capacity and typical irrigations. Intact soil columns from a Sharpsburg soil (fine montmorillonitic, mesic Typic Argiudoll) planted to Kentucky bluegrass (Poa pratensis L.) were encased in concrete, excavated, and brought to the greenhouse. Porous ceramic plates were attached to some column bottoms and suction (50 kPa) was applied to simulate soil water matric potentials at field water capacity and eliminate perched water tables. Under 2.5-cm irrigations, evapotranspiration (ET) was 15% greater (P = 0.09) from columns without suction than from columns with suction. Drainage was 460% greater (P = 0.08) from columns under suction receiving 2.5-cm irrigation. Volume of drainage water and total bromide collected was significantly greater (P = 0.01 and 0.02) from columns under suction receiving 5.0-cm irrigations than from columns receiving 2.5-cm irrigations. Averaged bromide concentrations in the drainage did not differ among treatments. Water and solute movement may be underestimated in greenhouse studies using containers without suction plates to eliminate perched water tables.

Journal Paper no. 10155 of the Agricultural Res. Div., Univ. of Nebraska, Lincoln.

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