Total carbon contents and soil properties in Nong Bo reservoir, Maha Sarakham Province

Abstract

The research aimed to study was to total carbon contents and soil properties in Nong Bo reservoir,
Maha Sarakham province. Soil samples were collected at three different depths (0-25 cm, 25-50 cm and
50-100 cm) by disturbed and non-disturbed method, total 30 plots. Results found that the mean soil total
carbon in subsoil > medium soil > topsoil layer (4.74±3.22x10-4 > 1.59±0.97x10-4 > 8.40±5.70x10-5 t/ha)
respectively. In addition, these three layers with the soil reaction ranged from 4.32-8.72, soil electrical
conductivity 0.78-11.90 dS/m, soil moisture 5.32-114.74 % by weight, bulk density 0.92-2.65 g/cm3
and
soil texture found that the mostly was sandy loam. Moreover, there was significantly relationship (p<0.05)
between total carbons contents and pH (0-100 cm) with correlation coefficient (r) were 0.212. There was
significantly relationship (p<0.01) between total carbon contents and bulk density, clay, sand, silt
(0-100 cm.) with correlation coefficient (r) were 0.312, 0.710, -0.659 and 0.362 respectively. In addition,
there was significant linear relationship between total carbon contents and soil properties at three different
depths (0-25 cm, 25-50 cm and 50-100 cm) with coefficient of determination (R2
) were 0.823, 0.665 and
0.935 respectively