Cation effects on ammonia volatilization loss from urea applied to a tropical soil
Ammonia volatilization loss from surface-applied urea is an important problem even in tropical soils. The presence of cations at urea microsites during urea hydrolysis can reduce ammonia volatilization loss. Laboratory, and field experiments were carried out to study the effect of cations on ammonia...
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| Format: | Conference or Workshop Item |
| Language: | English |
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Kluwer Academic Publishers
1994
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| Online Access: | http://psasir.upm.edu.my/id/eprint/58449/ http://psasir.upm.edu.my/id/eprint/58449/1/Cation%20effects%20on%20ammonia%20volatilization%20loss%20from%20urea%20applied%20to%20a%20tropical%20soil.pdf |
| _version_ | 1848853650121687040 |
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| author | Yusop, Mohd Khanif Pancras, H. Daud, C. |
| author_facet | Yusop, Mohd Khanif Pancras, H. Daud, C. |
| author_sort | Yusop, Mohd Khanif |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Ammonia volatilization loss from surface-applied urea is an important problem even in tropical soils. The presence of cations at urea microsites during urea hydrolysis can reduce ammonia volatilization loss. Laboratory, and field experiments were carried out to study the effect of cations on ammonia volatilization loss from urea applied to a tropical soil. In the laboratory study urea treated with Ca2+, Mg2+ or K+ at the rate 0, 0.25, 0.5, 1.0 and 2.0 cation/N (chemical equivalent ratio) were applied on the surface of the Bungor top soil (Typic Paleudult). Ammonia volatilization loss was determined daily for a duration of one week by using the force draft technique. In the field study ammonia volatilization loss was determined by using 15N recovery technique. In this experiment 15N labelled urea treated with Ca2+, Mg2+ or K+ at the rate of 0, 0.5 and 1.0 cation/N (chemical equivalent ratio) were surface-applied in micro plots. Ammonia volatilization loss was determined at the end of one week and two weeks. In the laboratory study treatments of urea with Ca2+, Mg2+ or K+ were effective in reducing ammonia volatilization loss. The effectiveness improved with increasing the rate of cations. At the highest rate of the cation added (2.0) the losses were reduced from 36.9% to less than 13.1%. In the field experiment Ca2+, Mg2+ and K+ effectively reduced ammonia volatilization loss. The ammonia volatilization loss was reduced from 27.7% to less than 15.2% in one week. Subsequently more fertilizer N was recovered in the treated soils. Thus we conclude that surface application of urea with Ca2+, Mg2+ or K+ reduced ammonia volatilization. |
| first_indexed | 2025-11-15T10:57:20Z |
| format | Conference or Workshop Item |
| id | upm-58449 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:57:20Z |
| publishDate | 1994 |
| publisher | Kluwer Academic Publishers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-584492018-01-17T02:17:39Z http://psasir.upm.edu.my/id/eprint/58449/ Cation effects on ammonia volatilization loss from urea applied to a tropical soil Yusop, Mohd Khanif Pancras, H. Daud, C. Ammonia volatilization loss from surface-applied urea is an important problem even in tropical soils. The presence of cations at urea microsites during urea hydrolysis can reduce ammonia volatilization loss. Laboratory, and field experiments were carried out to study the effect of cations on ammonia volatilization loss from urea applied to a tropical soil. In the laboratory study urea treated with Ca2+, Mg2+ or K+ at the rate 0, 0.25, 0.5, 1.0 and 2.0 cation/N (chemical equivalent ratio) were applied on the surface of the Bungor top soil (Typic Paleudult). Ammonia volatilization loss was determined daily for a duration of one week by using the force draft technique. In the field study ammonia volatilization loss was determined by using 15N recovery technique. In this experiment 15N labelled urea treated with Ca2+, Mg2+ or K+ at the rate of 0, 0.5 and 1.0 cation/N (chemical equivalent ratio) were surface-applied in micro plots. Ammonia volatilization loss was determined at the end of one week and two weeks. In the laboratory study treatments of urea with Ca2+, Mg2+ or K+ were effective in reducing ammonia volatilization loss. The effectiveness improved with increasing the rate of cations. At the highest rate of the cation added (2.0) the losses were reduced from 36.9% to less than 13.1%. In the field experiment Ca2+, Mg2+ and K+ effectively reduced ammonia volatilization loss. The ammonia volatilization loss was reduced from 27.7% to less than 15.2% in one week. Subsequently more fertilizer N was recovered in the treated soils. Thus we conclude that surface application of urea with Ca2+, Mg2+ or K+ reduced ammonia volatilization. Kluwer Academic Publishers 1994 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/58449/1/Cation%20effects%20on%20ammonia%20volatilization%20loss%20from%20urea%20applied%20to%20a%20tropical%20soil.pdf Yusop, Mohd Khanif and Pancras, H. and Daud, C. (1994) Cation effects on ammonia volatilization loss from urea applied to a tropical soil. In: 8th Nitrogen Workshop, 5-8 Sept. 1994, University of Ghent, Belgium. (pp. 479-482). 10.1007/978-94-011-5450-5_78 |
| spellingShingle | Yusop, Mohd Khanif Pancras, H. Daud, C. Cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| title | Cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| title_full | Cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| title_fullStr | Cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| title_full_unstemmed | Cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| title_short | Cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| title_sort | cation effects on ammonia volatilization loss from urea applied to a tropical soil |
| url | http://psasir.upm.edu.my/id/eprint/58449/ http://psasir.upm.edu.my/id/eprint/58449/ http://psasir.upm.edu.my/id/eprint/58449/1/Cation%20effects%20on%20ammonia%20volatilization%20loss%20from%20urea%20applied%20to%20a%20tropical%20soil.pdf |