Rétention de l'azote et évolution des propriétés d'un humus brut de station de pin gris (Pinusbanksiana Lamb.) après application d'engrais azotés
- 1 March 1981
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Forest Research
- Vol. 11 (1) , 51-61
- https://doi.org/10.1139/x81-007
Abstract
The addition of urea invitro to the coarse humus of a jack pine nursery has led to an increased pH following urea hydrolysis, with the result that the cationic exchange capacity was increased while the organic matter in the humus was partly dissolved. Furthermore, considerable losses of nitrogen due to ammonia volatilization are likely to occur following the application of urea. The use of nitrate mineral fertilizers ((NH4)2SO4, NH4NO3, or (NO3)2Ca), though these are not subject to losses through ammonia volatilization, produces a significant displacement of soil elements. Moreover, the nitrogen in such fertilizers is more prone to leaching than mineral nitrogen freed by urea hydrolysis.This publication has 1 reference indexed in Scilit:
- Fate of Urea Fertilizer Added to a Boreal Forest Pinus banksiana Lamb. StandSoil Science Society of America Journal, 1977