Impacts of atmospheric ozone on yields and lipid content of Thai soybean Chiang Mai 60 cultivar
2010
Suphawan Lumson(Naresuan University, Phitsanulok (Thailand). Faculty of Agriculture Natural Resources and Environment. Department of Natural Resources and Environment) E-mail:[email protected] | Kanita Thanacharoenchanaphas(Naresuan University, Phitsanulok (Thailand). Faculty of Agriculture Natural Resources and Environment. Department of Natural Resources and Environment) | Orose Rugchati(Naresuan University, Phitsanulok (Thailand). Faculty of Agriculture Natural Resources and Environment. Department of Agro-Industry) E-mail:[email protected], [email protected]
Objective of this study was to investigate the impacts of ozone on yield, nutrition values and lipid content in Thai soybean (Glycine max (L.) Merrill) Chiang Mai 60 Cultivar. Soybean was grown in the Naresuan University, Phitsanulok during August 2008-July2009. Open-top chamber system was applied with 3 levels of ozone concentrations, at ambient level (32 ppb) lower (12 ppb) and higher than ambient level (62 ppb). Soybean plants were exposed to ozone for 7 h /day from seedling to maturing stage. The results indicated that elevated ozone concentrations significantly reduced yield and yield component of soybean. Numbers of pod/plant by were reduced 36 percent when compared between low level (12 ppb ) and high level (62 ppb) treatment. The significant negative results were found in moisture, ash and fiber by 31, 25 and 33 percent, respectively. In contrast, we found the strong positive result in lipid content which increased 17 percent in treatment with high level of ozone. The results indicated that the elevated atmospheric ozone concentrations suppress yield and nutrition in soybean seed but lipid content.
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