Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia

Ozone (O3) is a secondary gaseous pollutant produced through photochemical reaction known to have substantial impacts on agricultural production in North America and Western Europe. In Malaysia, emissions of O3 precursors such as non-methane hydrocarbons and nitrogen dioxide are rapidly increased du...

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Main Author:	Ali, Sharifah Azlina
Format:	Thesis
Language:	English English
Published:	2007
Subjects:	Rice - Ozone-depleting substances - Kedah - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/4757/1/FPAS_2007_4.pdf
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id	my-upm-ir.4757
record_format	uketd_dc
spelling	my-upm-ir.47572013-05-27T07:18:09Z Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia 2007 Ali, Sharifah Azlina Ozone (O3) is a secondary gaseous pollutant produced through photochemical reaction known to have substantial impacts on agricultural production in North America and Western Europe. In Malaysia, emissions of O3 precursors such as non-methane hydrocarbons and nitrogen dioxide are rapidly increased due to urbanization, industrialization and the increasing number of motor vehicles. Furthermore climatic condition in the country is frequently favourable for the formation of high concentration of O3. It can threaten the rice production which is important to the country as it is the staple food for the vast majority of the population. In this study, different nutrient regimes were employed to assess the impact of ozone on the growth and yield of variety of local rice (Oryza sativa L.) at Muda area in three different ambient ozone (O3) concentrations. A controlled experiment involving ambient ozone (non-filtered air) and filtered air treatment in open top chambers demonstrated protective effects of nutrient against ozone. The study found that ozone significantly reduced the growth of rice plant by inhibiting photosynthetic rate, stomatal conductance, transpiration, tiller number and biomass. The result also demonstrated that the growth of rice plant was significantly increased when adding 25% of nutrient regime from normal practices. The relationship between grain dry weight, ozone dosage (AOT40) and the optimum nutrient regime expressed through a fitting linear model produced the following equation: Grain Yield Weight (N125) = (-0.00045*AOT40)+(124.3953). Rice - Ozone-depleting substances - Kedah - Case studies 2007 Thesis http://psasir.upm.edu.my/id/eprint/4757/ http://psasir.upm.edu.my/id/eprint/4757/1/FPAS_2007_4.pdf application/pdf en public masters Universiti Putra Malaysia Rice - Ozone-depleting substances - Kedah - Case studies Environmental Studies English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Rice - Ozone-depleting substances - Kedah - Case studies
spellingShingle	Rice - Ozone-depleting substances - Kedah - Case studies Ali, Sharifah Azlina Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia
description	Ozone (O3) is a secondary gaseous pollutant produced through photochemical reaction known to have substantial impacts on agricultural production in North America and Western Europe. In Malaysia, emissions of O3 precursors such as non-methane hydrocarbons and nitrogen dioxide are rapidly increased due to urbanization, industrialization and the increasing number of motor vehicles. Furthermore climatic condition in the country is frequently favourable for the formation of high concentration of O3. It can threaten the rice production which is important to the country as it is the staple food for the vast majority of the population. In this study, different nutrient regimes were employed to assess the impact of ozone on the growth and yield of variety of local rice (Oryza sativa L.) at Muda area in three different ambient ozone (O3) concentrations. A controlled experiment involving ambient ozone (non-filtered air) and filtered air treatment in open top chambers demonstrated protective effects of nutrient against ozone. The study found that ozone significantly reduced the growth of rice plant by inhibiting photosynthetic rate, stomatal conductance, transpiration, tiller number and biomass. The result also demonstrated that the growth of rice plant was significantly increased when adding 25% of nutrient regime from normal practices. The relationship between grain dry weight, ozone dosage (AOT40) and the optimum nutrient regime expressed through a fitting linear model produced the following equation: Grain Yield Weight (N125) = (-0.00045*AOT40)+(124.3953).
format	Thesis
qualification_level	Master's degree
author	Ali, Sharifah Azlina
author_facet	Ali, Sharifah Azlina
author_sort	Ali, Sharifah Azlina
title	Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia
title_short	Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia
title_full	Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia
title_fullStr	Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia
title_full_unstemmed	Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia
title_sort	effects of ambient ozone (o3) concentrations on the growth performance of rice (oryza sativa var. mr 219) treated with different nutrient regimes in the muda area, malaysia
granting_institution	Universiti Putra Malaysia
granting_department	Environmental Studies
publishDate	2007
url	http://psasir.upm.edu.my/id/eprint/4757/1/FPAS_2007_4.pdf
_version_	1747810270213832704

Effects of ambient ozone (O3) concentrations on the growth performance of rice (oryza sativa var. Mr 219) treated with different nutrient regimes in the muda area, Malaysia

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