Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics
Nitrous oxide (N20) emission to the atmosphere has a great implication on global climate change. Agricultural soils seem to be its major source, though little attention is given to the soils and upland cropping systems of the humid tropics. Thus, laboratory experiments were carried out to study t...
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2001
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my-upm-ir.105732024-04-17T06:42:45Z Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics 2001-03 Khalil, Mohammad Ibrahim Nitrous oxide (N20) emission to the atmosphere has a great implication on global climate change. Agricultural soils seem to be its major source, though little attention is given to the soils and upland cropping systems of the humid tropics. Thus, laboratory experiments were carried out to study the impact of N sources, moisture regimes and soil types on N20 production A field experiment was conducted to measure N20 emissions from a maize-groundnut cropping system managed with different N sources. The laboratory incubation study using an Ultisol showed a maximum N20 flux of 2379 ug N20-N kg-1 soil d-1 with chicken manure application at 60010 water-filled pore space (WFPS). Application of potassium nitrate, groundnut residue and urea resulted in smaller production rates (61 5 - 699 ug N20-N kg-l soil d-1). Addition of ammonium sulfate and maize residue produced the lowest rates, 229 and 246 ug N20-N kg-1 soil d-1, respectively. In general, the total N20 production in 25 days increased with decrease in C/N ratio of the organic N sources. Nitrous oxide. Cropping systems. 2001-03 Thesis http://psasir.upm.edu.my/id/eprint/10573/ http://psasir.upm.edu.my/id/eprint/10573/1/FP_2001_28_.pdf text en public doctoral Universiti Putra Malaysia Nitrous oxide. Cropping systems. Faculty of Agriculture Abu Bakar, Rosenani English |
| institution |
Universiti Putra Malaysia |
| collection |
PSAS Institutional Repository |
| language |
English English |
| advisor |
Abu Bakar, Rosenani |
| topic |
Nitrous oxide. Cropping systems. |
| spellingShingle |
Nitrous oxide. Cropping systems. Khalil, Mohammad Ibrahim Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics |
| description |
Nitrous oxide (N20) emission to the atmosphere has a great implication on
global climate change. Agricultural soils seem to be its major source, though little
attention is given to the soils and upland cropping systems of the humid tropics. Thus,
laboratory experiments were carried out to study the impact of N sources, moisture
regimes and soil types on N20 production A field experiment was conducted to
measure N20 emissions from a maize-groundnut cropping system managed with
different N sources. The laboratory incubation study using an Ultisol showed a
maximum N20 flux of 2379 ug N20-N kg-1 soil d-1 with chicken manure application
at 60010 water-filled pore space (WFPS). Application of potassium nitrate, groundnut
residue and urea resulted in smaller production rates (61 5 - 699 ug N20-N kg-l soil
d-1). Addition of ammonium sulfate and maize residue produced the lowest rates, 229
and 246 ug N20-N kg-1 soil d-1, respectively. In general, the total N20 production in
25 days increased with decrease in C/N ratio of the organic N sources. |
| format |
Thesis |
| qualification_level |
Doctorate |
| author |
Khalil, Mohammad Ibrahim |
| author_facet |
Khalil, Mohammad Ibrahim |
| author_sort |
Khalil, Mohammad Ibrahim |
| title |
Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics |
| title_short |
Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics |
| title_full |
Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics |
| title_fullStr |
Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics |
| title_full_unstemmed |
Nitrous Oxide Emission from an Upland Cropping System in the Humid Tropics |
| title_sort |
nitrous oxide emission from an upland cropping system in the humid tropics |
| granting_institution |
Universiti Putra Malaysia |
| granting_department |
Faculty of Agriculture |
| publishDate |
2001 |
| url |
http://psasir.upm.edu.my/id/eprint/10573/1/FP_2001_28_.pdf |
| _version_ |
1804888570612154368 |