Short-lived Effects of Olive Pomace Biochar Produced at Different Temperatures on Nitrate (NO3-), Bromide (Br-), Sulfate (SO42-) and Phosphate (PO43-) Leaching from Sandy Loam Soils


İLAY R.

COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

Biochar is a product of organic origin, which can be used in agriculture to improve primarily the physical and chemical properties of soil. In this study, olive pomace (OP) was used for biochar production. Olive pomace biochar (OB) was produced at two different pyrolysis temperatures as 350 degrees C and 700 degrees C (OB(350)and OB700). OB was mixed at the rates of 1% (w/w) with sandy loam (SL) soil (Hypereutric Fluvisols) and the effect of OB(350)and OB(700)treatments on selected anions leaching was investigated using column study. Fertilizers were applied to the soil at the rate of 400 kg nitrogen (N), 100 kg phosphorus (P), 50 kg sulfur (S) ha(-1). The bromide (Br-) tracer (KBr2) was added for monitoring nitrate (NO3-) movement within the soil. Nitrate (NO3-), phosphate (PO43-), sulfate (SO42-), and bromide (Br-) concentrations in the leachates were measured 12 times (LN) during the study. Biochar produced at two different temperatures did not have significant effects on anion leaching from the SL soil. There was no PO(4)(3-)anion detected in leachates of all treatments over 12 leaching periods. Recovery of NO(3)(-)content was about 30% higher than that of Br(-)at the end of the last leaching period however NO(3)(-)and Br(-)leaching showed similar trends during the study. As a conclusion application of 1%, OB produced at 350 degrees C and 700 degrees C temperatures did not have any effect on NO3-, Br-, and SO(4)(2-)leaching from SL soils.