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| Titel: |
Measurement of Ammonia Emission Following Surface Application of Urea Fertilizer from Paddy Fields |
| Auteur: |
Md. Toufiq Iqbal |
| Verschenen in: |
Pakistan journal of biological sciences |
| Paginering: | Jaargang 8 (2005) nr. 3 pagina's 429-432 |
| Jaar: |
2005 |
| Inhoud: |
Ammonia emission from agriculture is one of the most important pathways of nitrogen loss from agricultural cultivated field. In this study, the measurement of ammonia emission from paddy field obtained by surface application of urea fertilizer was reported. The main objective of the present study were to assess amount of NH3 emission and the loss of nitrogen from paddy field as affected by various N doses, i.e. 0 (control), 90 (N1), 180 (N2), 270 (N3) and 360 (N4) Kg ha-1, following field surface application of urea fertilizer. Ammonia emissions were measured by continuous air flow enclosure method from plots fertilized with the application of surface urea. Increase in urea-N dosage increased NH3 emission that was measured from paddy field. Most of the NH3 emission occurred during the first 12 days after fertilizer application. Highest ammonia emission rate was 28 g day-1 and total amount of ammonia emission was 56.21 kg ha-1 in N4 treatment. The results also show that N loss through NH3 emission accounted for 11 to 16% during the rice growing season. These magnitudes of loss of N appear to be most important for environmental point of view. |
| Uitgever: |
Asian Network for Scientific Information (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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