Woodchip biochar with or without synthetic fertilizers affects soil properties and available phosphorus in two alkaline, chernozemic soils
Fertility enhancement with biochar application is well documented for tropical acidic soils; however, benefits of biochar coapplied with synthetic fertilizers (SFs) on soil fertility are not well documented, particularly for alkaline chernozems. We examined the short term interactive effects of woodchip biochar amendment with fertilizers on selected soil properties, available phosphorus (P) and P fractions of two alkaline Chernozems from Manitoba. Treatments were (1) urea and monoammonium phosphate fertilizers, (2) biochar at 10 g kg 1, (3) biochar at 20 g kg 1, (4) biochar at 10 g kg 1 with fertilizers, (5) biochar at 20 g kg 1 with fertilizers, and (6) a control. Treated soils were analysed for pH, electrical conductivity (EC) and Olsen P concentration biweekly, and for P fractions, cation exchange capacity (CEC) organic carbon (OC) and wet aggregate stability after 70 d of incubation. Biochar amendment without fertilizers significantly increased soil pH and CEC but had no effect on EC, while coappl.