Effects of biochar derived from hazelnut shell on soil nutrient contents

In this study, the effects of the hazelnut husk (FZ), animal manure (AG) and the biochar (BK) obtained from hazelnut shells on pH, organic matter, macro and micro element contents of the soil were investigated after incubation. For this purpose, 0-3-6 ton da-1 organic materials were applied to the soil and were incubated in greenhouse conditions for 30-60-90-120 days. The trial was conducted according to the randomized parcels experiment design with 3 replicates. As the amount of organic material increased, organic matter, total nitrogen, available phosphorus, extractable potassium contents in the soil and soil pH (except for hazelnut husk application) increased, but plant available copper content and iron contents (with 6 ton application) decreased. It has been determined that soil available zinc and manganese contents were decreased by increasing biochar applications. Total nitrogen and organic matter content of the soil tended to decrease generally depending on the duration of the incubation, whereas it has been found that the farmyard manure applications increased the organic matter content in 90 and 120 incubation times. Available micro element contents of the soil were regularly decreased during incubation period, but available phosphorus and extractable potassium contents increased during 90 and 60 incubation times, respectively. As a result, the effect of organic material application on examining parameters was obtained in the highest hazelnut husk applications except for pH and nitrogen, and the lowest in biochar applications