Using of Organic or Inorganic Fertilizers to Grow Thai Jasmine Rice 105 in Soil with Natural Radioactivity (226Ra, 232Th and 40K); Transfer of Radioactivity to Roots

Abstract

This research study the radioactivity concentration of ²²⁶Ra, ²³²Th and ⁴⁰K using organic and           inorganic fertilizers were successfully measured as gamma ray spectrometry technique with HPGe detector on Thai Jasmine rice 105 plant (root) and on corresponding soil samples. Soil sample and natural water  source  of chemical characteristics (pH, OM, K, P and N) were also analyzed for their estimated effects on  distribution of radioactivity concentration. The result of chemical characteristics showed that the pH of soil sample of organic and inorganic fertilizers before planting is acids in a range of 3.74-3.77 and the pH of  natural water source is weak acids as 5.69±0.02. Result of organic matter found that the OM, N, P and K   of soil in all fertilizer is in a range of 1.26±0.02-1.35±0.02, 0.0895±0.0025, 3 ppm and 54 ppm, respectively.     Result     of distribution of radioactivity concentration of ²²⁶Ra, ²³²Th and ⁴⁰K found that soil sample before planting is relatively little value in both of fertilizers. The concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K for Soil of organic fertilizer farm were 26.72 ± 0.66, 11.24 ± 0.51 and 103.26 ± 3.93, respectively. The concentrations  of ²²⁶Ra, ²³²Th and ⁴⁰K for soil of inorganic fertilizer farm were 18.50 ± 0.56, 8.82 ± 0.41 and 63.30 ± 2.81, respectively. However, when using the organic fertilizer for planting found that it effects on radioactivity concentration of ⁴⁰K which has higher value than that inorganic fertilizer for planting. While radioactivity  concentration of ²²⁶Ra and ²³²Th is slightly change value in both of fertilizers. Using the organic and  inorganic fertilizer planting resulted in uptake of radioactivity concentration from soil to root (TF) showed    that the distribution radioactivity concentration of ⁴⁰K uptake was higher than that of ²²⁶Ra and ²³²Th in all  fertilizer planting.