Changes in physico-chemical properties of a sandy loam soil depending on the particle size of hazelnut shell-derived biochar
2023
Ozenc, D.B. | Tarakcioglu, C. | Yilmaz, F.I. | Aygun, S.
This study evaluated the effects of hazelnut shell-derived biochar particle sizes on the soil's physical and chemical properties, and on various nutrient contents present in the sandy loamy soils. For this purpose, an incubation experiment in the plastic high tunnel was been performed under sixteen treatments (control-only soil), and at four incubation times (30, 60, 90, and 120 d), by using three different biochar sizes (greater than or equal to 1, 1 - 2, and 2 - 4 mm). The addition of 1 - 2 and 2 - 4 mm biochar during the incubation time decreased the bulk density in the soil by 26%. The particle size less than or equal to 1 mm on the other hand, increased the available water content, percentage of aeration porosity, and macropore, but decreased the micropore percentage in the soil. The soil's pH was the highest at 1 - 2 mm, 120-d sample, organic matter content at less than or equal to 1 mm, 120-d sample, and total nitrogen at less than or equal to 1 mm, 60 d sample. Regarding the available phosphorus and extractable potassium contents, the most effective particle size was been less than or equal to 1 mm and the incubation period has been 90 d for P and 60-d for K. The reduction in biochar particle size decreased the soil's micro element content. The results showed that among all applications less than or equal to 1 mm biochar particle size was the most effective size on many physicochemical properties of sandy loam soils. Also, a potential study related to the subject of this research focusing on the effects of different textures of particle sizes derived from hazelnut shell biochars.
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