Effect of Nitrogen Fertilizer and Biochar on Organic Matter Mineralization and Carbon Accretion in Soil

Soil carbon (C) mineralization was studied in an incubation experiment comprised of two factors having six organic materials and three nitrogen (N) rates. Cow dung (CD), rice straw (RS), wood ash (WA), cow biochar (CB), (RB) (WB) considering 2.5 g C kg?1 soil along with levels N, i.e., 0, 0.05 0.10 N were mixed 400 used each pot. The pots placed for 30, 60, 90, 120, 150 180 days incubation, soils collected after analyzed N. Irrespective treatment factors, decreased irregular fashion until incubation. From the initial level 1.91%, contents to 1.08, 1.10, 1.06, 1.23, 1.17 1.12% CD, RS, WA, CB, RB WB, respectively, 1.28, 1.11 0.99% soil, at followed order WA > CD RS WB CB. Biochars could supply stable while enhances mineralization; optimization is therefore essential ensure accretion.