Conducted by NwSSU
Completed on 2019
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Soil management practices like increasing soil organic carbon content by application of organic material like biochar and improving soil biodiversity can play an important role in sequestering C in soil. Twenty-eight days of incubation experiment was conducted to determine the effects of biochar on C02 evolution and soil chemical properties of sandy loam soil. There were 7 treatments (T1 = Control, T2 = 50 g PLC kg-1 soil, T3 = 50 g PHC kg-1 soil, T4 = 40 g PLC 10 g PHC kg-1 soil, T5 = 30 g PLC + 20 g PHC kg-1 soil, T6 = 20 g PLC + 30 g PHC kg-1 and T7 = 10 g PLC + 40 g PHC soil which were laid out in RCBD with three replications. The results showed that application of biochar enhances microbial respiration but there were no significant differences between the treatments (P < 0.05) on the C02 evolved in sandy loan soil for about 28 days of incubation experiment. Some chemical properties of sandy loam soil after the incubation experiment such as soil pH, % organic carbon and extractable P were significantly increased by the application of different proportions of biochar (P < 0.05). However, the addition of different proportions of biochar (T4, T5, T6, and T 7) and biochar alone (T 2, T3) resulted in lower soil pH than the control (T1) due to the production of NH4+, C02 and organic acids during microbial metabolism. The result of the experiment revealed that addition of 30g PLC Kg-1 soil + 20g PHC Kg-1 soil could enhance microbial respiration and promote nutrient availability in sandy loam soil.