Natural Rubber Tire Waste Charcoal (NRTWC) on Organic Carbon Mineralization in Tea Growing Soils

The aim of this study was to assess the impact natural rubber tire waste charcoal (NRTWC) amendment on carbon mineralization in tea cultivated soils low country wet zone Sri Lanka. NRTWC applied at different rates (0%, 1%, 1.6%, 2.2% and 2.8% w/w) soil evaluated 10 20 weeks after treatment. Representative samples were incubated for 42 days microbial respiration determined. During first seven incubation, a rapid observed all treatments. A decline then during period from 14th 28th day incubation. No changes towards end incubation (35 days). Significant (P ≤ 0.05) differences among application noticed initial stages However, variations minimal cumulative ranged 506 1072 mg/kg taken corresponding variation changed 1730 drawn increased rapidly early stages, decreased gradually finally flattened out resulted substantial increase when compared with control. As revealed by results, decomposes slowly can be considered as sound source which could enhance sequestration degraded soils.