Study of Environmental Impacts Before and After Using the Organic-Chemical Fertilizer in Rice Paddy Fields

Wipawee KHAMWICHIT; Wipada SANONGRAJ; Sompop SANONGRAJ

Authors

Wipawee KHAMWICHIT School of Engineering and Resources, Walailak University, Thasala, Nakhon Si Thammarat 80161
Wipada SANONGRAJ Research Center for Environmental and Hazardous Waste Management, Department of Chemical Engineering, Faculty of Engineering, Ubonratchathani University, Ubonratchathani 34190
Sompop SANONGRAJ Research Center for Environmental and Hazardous Waste Management, Department of Chemical Engineering, Faculty of Engineering, Ubonratchathani University, Ubonratchathani 34190

Keywords:

Organic-chemical fertilizer, rice paddy fields, air quality, water quality, soil quality, environmental impact

Abstract

The environmental impact of an organic-chemical fertilizer developed by the Institute of National Science and Technology has been studied at Bansrangsabaeng Posai Ubonratchathani. The study revealed that the values of pH, EC, OC, total N, available P, and exchangeable K in soils from two varieties of rice tested Kor-Khor 10 and Kor-Khor 15 paddy fields are almost the same. The concentrations of VOC, NH₃, and CH₄ in the air from the rice paddy fields mentioned above are lower than 0.001 mg/m³ indicating no air pollution problems. Analysis of the water supply (ground water) and surface water within the studied area before and after using organic-chemical fertilizer, found that most of the water supply parameters including pH, Total Hardness, TDS, SS, Fe, Mn, and NO₃-N were not significantly changed and all of them met water supply standards. In terms of surface water quality, slightly different values of pH, TDS, SS, NO₃-N, TKN, PO₄-P, BOD, COD, and DO were observed compared with a standard fertilizer. In conclusion, the organic-chemical fertilizer is a viable alternative to standard chemical fertilizer and may help to reduce the environmental impact of such chemicals upon the land.

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