About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in JEQ

  1. Vol. 29 No. 1, p. 277-287
     
    Received: Oct 16, 1998


    * Corresponding author(s): david.chadwick@bbsrc.ac.uk
 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2134/jeq2000.00472425002900010035x

Nitrous Oxide and Methane Emissions following Application of Animal Manures to Grassland

  1. D. R. Chadwick *,
  2. B. F. Pain and
  3. S. K. E. Brookman
  1. Institute of Grassland and Environmental Research, North Wyke, Okehampton, Devon. EX20 2SB, UK.

Abstract

Abstract

Nitrous oxide (N2O) and methane (CH4) emissions were measured from grassland following manure applications at three times of the year. Pig (Sus scrofa) slurry and dairy cow (Bos taurus) slurry were applied in April, at equal rates of ammoniacal-N (NH+4-N), and in July, at equal volumetric rates (50 m3 ha−1). I n October, five manure types were applied to grassland plots at typical application rates: pig slurry, dilute dairy cow effluent, pig farm yard manure (FYM), beef FYM and layer manure. Emissions were measured for 20, 22, and 24 d, respectively. In April, greater cumulative emissions of N2O-N were measured following application of dairy cow slurry (1.51 kg ha−1) than pig slurry (0.77 kg ha−1). Cumulative CH4 emissions following application in April were significantly greater from the dairy cow slurry treatment (0.58 kg ha−1) than the pig slurry treatment (0.13 kg ha−1) (P < 0.05). In July, significantly greater N2O-N emissions resulted from pig slurry-treated plots (0.57 kg ha−1) than dairy cow slurry-treated plots (0.34 kg ha−1). Cumulative net CH4 emissions were very low following July applications (<10 g ha−1). In October, the lowest N2O-N emission resulted from application of dilute dairy effluent, 0.15 kg ha−1, with the greatest net emission from the application of pig slurry, 0.74 kg ha−1. Methane emissions were greatest from the plots that received pig FYM, resulting in a mean cumulative net emission of 2.39 kg ha−1.

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

Copyright © .