การศึกษาแบบจำลองการประมาณค่าอินทรียวัตถุ : กรณีศึกษาการเพาะปลูกยางพารา

Abstract

The first aim of this chemical engineering project was to study and evaluate the kinetics of organic matter (OM) models underground (soil) and aboveground (rubber tree) for rubber trees plantation over a 25-years period. A non-linear regression technique was used to analyze the experimental data. The results showed that the kinetics of OM were based on four (4) parameters including OM rate constant, climate conditions, geography and cultivation factors. The kinetic model of soil OM with no tapping was based on first order reaction with rate of 0.0067 y-2 ๐C-1. The kinetic models of soil OM with before (0-6 years) and after tapping (after 7 years) were first and zero reactions with rate of 0.0067 y-2 ๐C-1 and 0.172 ton/ha y2 ๐C respectively. The kinetic model of rubber tree plantation was zero order reaction with rate of 0.8209 ton/ha y2 ๐C. The second aim of this study was to assess global warming potential (GWP) impact according to IPCC (2007) and economic value based on carbon credit analysis. The function unit (FU) was specified as 1 hectare with 25-years life of rubber tree plantation. The results showed that total GWP impact of no and after tapping cases were -2,189 and -521 ton CO2-eq respectively. The carbon credits of no and after tapping cases were 81,550 and 20,378 Baht respectively