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| Titel: |
Volatilization and rapid depletion of urea spray-applied to Kentucky bluegrass turf |
| Auteur: |
Bowman, D. C. Paul, J. L. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 13 (1990) nr. 10 pagina's 1335-1344 |
| Jaar: |
1990-10 |
| Inhoud: |
Urea was spray-applied to a Kentucky bluegrass (Poa pratensis L) turf at a rate of 50 kg N ha-1. Two volumes of solution were used to provide application depths of 0.5 and 2.0 mm. Ammonia volatilization and the rate of disappearance of the applied N were then examined over a 48 hr period. Urea-N was positioned primarily on shoots with the 0.5 mm application, whereas the 2.0 mm application distributed the urea equally between the shoot and the thatch/soil layers. Urea positioned in the thatch/soil was hydro-lyzed rapidly, while very little hydrolysis occurred with the urea positioned on the shoots. Cumulative volatile loss amounted to 5.3% and 11.6% of the applied N with the 0.5 and 2.0 mm application, respectively. Applied urea-N disappeared rapidly from the turf/soil system. Approximately 80% and 100% of the applied N was depleted by 48 hr for the 0.5 and 2.0 mm application, respectively. The duration of volatile loss was correlated with the period that the urea-N was resident in the turf profile. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 12 van 12 gevonden artikelen
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