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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主要作者: Khalil, Mohammad Ibrahim
格式: Thesis
語言:English
English
出版: 2001
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在線閱讀:http://psasir.upm.edu.my/id/eprint/10573/1/FP_2001_28_.pdf
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spelling 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