Efficiency of Bio-Product to Reduce Soil Contaminated with Cadmium in Paddy Fields

Authors

  • Wimonrat Sitisara คณะพลังงานและสิ่งแวดล้อม มหาวิทยาลัยพะเยา
  • Sukthai Pongpattanasiri

Abstract

This research was aimed to study effect of bio-product by defining microorganisms with concentration of 1.0 x 107 cell/gram. Bio-product was a mixture of the stains of Achormobacter sp., Azoto bacter sp., Bacillus subtilis, Bacillus thuringiensis and Nitrobactor sp. Experimental soil used with 4 conditions; Chemical fertilizer (P-CHEM), bio-product concentration was 300ml/water200L/Rai (P-A300), bio-product concentration was 500ml/water200L/Rai (P-A500) and Natural soil (P-T). Each condition consisted of 5 pots that each pot contained soil samples contaminated with cadmium (Cd) were collected from Mae tao sub district, Mae sot district, Tak province, Thailand in amount of 50 kg dry soil/pot, added water by maintaining a surface water level at 5 cm for investigating rice growth and Cd reduction. Experiments were conducted to compare between without and with rice (Khao Mali 105) with 5 plants/pot by detecting Cd changes, soil digestion and Cd content analysis. The results showed that in the ripening phase, amount of Cd in the soil with P-A500 and P-A300 were significantly decreased by 45.54% and 43.71%, respectively. On the other hand, that of P-T and P-CHEM were significantly decreased only by 21.68% and 22.99%, respectively. At the end of 120 days of cultivation, final concentration of Cd in the soil with P-A500 and      P-A300  were 34.55 and 34.75 mg/kg, respectively, based on the soil quality standards by the Pollution Control Department (not higher than 37 mg/kg). Rice grains with P-CHEM (0.54 mg/kg) was accumulated Cd more than     P-A300 (0.29mg/kg) and P-A500 (0.21 mg/kg). Bio-product could reduce accumulation of Cd in the grains compared with P-CHEM and PT.  Keywords :  bio-product, cadmium, paddy fields, microorganisms

Author Biography

Wimonrat Sitisara, คณะพลังงานและสิ่งแวดล้อม มหาวิทยาลัยพะเยา

  

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2019-10-01

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บทความวิจัยจากการประชุมวิชาการระดับชาติ"วิทยาศาสตร์วิจัย"ครั้งที่ 11