Organic Carbon Sequestration in the Bottom Sediments of Hybrid Catfish Ponds
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Abstract
The objectives of this study were to assess the rate and potential of organic carbon sequestration in the bottom sediments of hybrid catfish (Clarias macrocephalus x C. gariepinus) ponds using organic carbon content, dry bulk density and sediment accumulation rate. Sediment samples were collected in 12 hybrid catfish ponds from 3 farms in Chang Ming subdistrict, Pannanikhom district, Sakon Nakhon province during January to February 2017. The results were the averages of pond age 3.50±0.52 years, sediment depth 19.88±4.04 cm, sediment accumulation rate 5.86±1.64 cm/year, dry bulk density of sediment 0.77±0.07 g/cm3, organic carbon content 1.51±0.45 % and organic carbon sequestration rate 699.22±370.91 g/m2/year. The potential of organic carbon sequestration in the sediments of 1,040 m2 (the average of hybrid catfish pond area) was 727.19 kg/year. Hybrid catfish pond can be a global carbon sequestration source by storing in the sediments.
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