Pyrolysis Temperature and Application Rate of Sugarcane Straw Biochar Influence Sorption and Desorption of Metribuzin and Soil Chemical Properties

Pyrolysis temperature and application rate of biochar to soil can influence herbicide behavior fertility. The objective was investigate the effect amendments with rates sugarcane straw biochar, produced at different pyrolysis temperatures, on sorption–desorption metribuzin in soil. analysis performed using high-performance liquid chromatography (HPLC). treatments were three temperatures (BC350, BC550 BC750 °C) seven (0, 0.1, 0.5, 1, 1.5, 5 10% w w?1). Amended decreased H + Al increased pH, OC, P, K, Ca, Mg, Fe, Mn, CEC BS contents. Kf values sorption desorption 1.42 0.78 mg(1?1/n) L1/n Kg?1, respectively, unamended Application < 1% sorbed ~23% desorbed ~15% metribuzin, similar soil, for all temperatures. BC350, 63.8, 75.5 89.4% 8.3, 5.8 3.7% respectively. High show an ability immobilize improve fertility, which may effectiveness weed control.