Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

PATTERN OF NITROGEN RELEASE DURING DECOMPOSITION OF SOME GREEN MANURES IN A TROPICAL ALLUVIAL SOIL

C. S. WEERARATNA
Plant and Soil
Vol. 53, No. 3 (NOVEMBER 1979), pp. 287-294
Published by: Springer
Stable URL: http://www.jstor.org/stable/42934966
Page Count: 8
  • More info
  • Cite this Item
PATTERN OF NITROGEN RELEASE DURING DECOMPOSITION OF SOME GREEN MANURES IN A TROPICAL ALLUVIAL SOIL
Preview not available

Abstract

The pattern of release of ammonium and nitrate nitrogen during decomposition of glyricidia, sunflower, centrosema, calapagonium and crotolaria under aerobic and anaerobic conditions, in an alluvial soil over a period of 7 weeks was studied. Under aerobic conditions, the NH₄⁺-N production reached the maximum after the 4th week. Nitrate-N and total available-N increased in all cases throughout the incubation period except in sunflower. This showed a nitrification inhibitory effect and had a relatively high C/N ratio (11.0) and low total N content (2.8%). In general the increase in NH₄⁺-N and NO₃⁻-N was more rapid in the early stages of incubation. Under anaerobic conditions, the production of these nutrients was considerably low. Soil organic matter mineralized faster than the added organic material which started to decompose slowly after sometime. Nitrate-N tend to decrease during incubation attributable to denitrification.

Page Thumbnails

  • Thumbnail: Page 
[287]
    [287]
  • Thumbnail: Page 
288
    288
  • Thumbnail: Page 
289
    289
  • Thumbnail: Page 
290
    290
  • Thumbnail: Page 
291
    291
  • Thumbnail: Page 
292
    292
  • Thumbnail: Page 
293
    293
  • Thumbnail: Page 
294
    294