About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in JEQ

  1. Vol. 12 No. 4, p. 508-513
     
    Received: Nov 20, 1982


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/jeq1983.00472425001200040014x

A Comparative Study of Bermudagrass Grown on Soils Amended with Aerobic or Anaerobically Digested Sludge1

  1. R. G. Amundson and
  2. W. M. Jarrell2

Abstract

Abstract

A greenhouse pot experiment was conducted in which bermudagrass [Cynodon dactylum (L.) Pers.] was grown on Holtville silty clay and San Emigdio fine sandy loam soils, which were amended with aerobically (AEDS) and anaerobically (ANDS) digesed sludges to supply N at 600, 900, and 1200 kg ha−1. Ammonium sulfate [(NH4)2SO4] was applied to other pots at rates to supply N at 300 and 600 kg ha−1. A second 600 kg N treatment as (NH4)2SO4 was applied in three split applications. All (NH4)2SO4 treatments received 60 kg of P as monocalcium phosphate (MCP). Cumulative yields of bermudagrass grown on aerobic sludge treatments were greater than those yields on anaerobic sludge treatments for both soils. Patterns of plant yields indicate that a large initial release of plant-available N occurred in aerobic sludge treatments relative to anaerobic treatments. Though not statistically significant, more N was accumulated by plants grown on aerobic than on anaerobic sludge-amended soils. On both soils, aerobic sludge-P was more plant-available than anaerobic sludge-P. Calculated recoveries of sludge-applied N and P showed little variation due to soil type at equal rates of sludge application. For both soils, 1 Mg of aerobic sludge or anaerobic sludge produced bermudagrass yields equivalent to those resulting from the application of 24–37 kg (NH4)2SO4-N and 7–10 kg (NH4)2SO4-N, respectively. Tissue concentrations of Cd were below 9 × 10−4 mmol kg−1 for all treatments, and were not considered to be excessive.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .