My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in AJ

  1. Vol. 74 No. 6, p. 947-950
     
    Received: Aug 7, 1981
    Published: Nov, 1982


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1982.00021962007400060005x

Nitrogen Source Effect on Nitrate and Ammonium Leaching and Runoff Losses from Greens1

  1. K. W. Brown,
  2. J. C. Thomas and
  3. R. L. Duble2

Abstract

Abstract

The use of sandy rooting media with rapid infiltration rates in the construction of golf greens provides the potential for N pollution of nearby water supplies. This study was designed to measure the effects of different N sources on NO3 and NH+4 concentrations in leachate and runoff from golf greens constructed with various rooting media.

Individual golf greens with USGA-type profiles were constructed in the field with upper 30 cm layers consisting of sand-peat, sandsoil-peat and sandy loam soil mixtures. All profiles were equipped with subsurface tile drains over a plastic sheet and were treated sequentially with the following N fertilizers: NH4NO4, ureaformaldehyde, 12-12-12, Milorganite, and IBDU. Leachate and runoff were collected and analyzed for NO3 and NH+4. Nitrate concentrations in leachate from sand, mixed, and soil greens fertilized with quick release materials ranged from 45 to 326, 8 to 314 and 8 to 170 mg liter−1, respectively and remained in this range for a 3-week period. Runoff concentrations from the greens constructed of sandy loam soil exceeded 30 mg liter−1. No runoff was collected from sand or mixed greens.

Nitrate N losses from various sources were in the order of NH4NO3 > 12-12-12 > Milorganite > Isobutylenediurea (IBDU) > Ureaformaldehyde. lsobutylenediurea provided a very uniform release rate. Milorganite had a 25 to 30 day delay before NO3 appeared in the leachate. Soluble sources, NH4NO3, and 12-12-12 exhibited leaching within 5 days after application. It appears that regular moderate applications of slow release N sources would provide minimum NO3 loss while supplying a continuous N supply.

Ammonium losses ranked from greatest to smallest were NH4NO3 > Ureaformaldehyde > Milorganite > 12-12-12 > IBDU. Ammonium losses contributed very little to the total N losses from golf greens. Highest total N loss was 23% of the applied N.

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

Copyright © .