عنوان مقاله [English]
Fire has significant effects on soil structure and vegetation. This research aimed to study the effects of fire on some physical (specific gravity and soil moisture) and chemical (electrical conductivity, acidity, amount of organic carbon, amount of organic matter, and elements of nitrogen, potassium, and phosphorus) forest soil of Chenarmishvan, Siakhdarengoon region, Fars province, Iran. For this purpose, a forest area was selected in Chenarmishvan, which had been set on fire in 1400. Meanwhile, the control (non-fire) was sampled similarly. Sampling was done at a depth of 0-20 cm. Physical and chemical properties of soil were measured in both areas (burned and control) and were compared with an independent t-test at P< 0.05. The results showed that there was no significant difference between the two studied areas in terms of soil moisture. In addition, the specific gravity of the soil was not affected by the fire since this parameter showed no significant difference between the two investigated areas. The electrical conductivity of the soil in the burned area was significantly higher than that of the control. There was a significant difference the acidity of the soil between the two areas. The value of this parameter in the burned area was 8.08 ± 0.085, which was higher than the value obtained in the non-fired area (7.85 ± 0.067). Our results also showed that fire could significantly increase the amount of organic matter and organic carbon in the soil. Furthermore, the amount of the nitrogen, phosphorus, and potassium in the burned area was significantly higher than the control. Based on our results, it can be concluded that burning can increase soil fertility in the short term. The findings of this study can be applied to many departments, such as those in charge of the environment and natural resources, with the goal of protecting the soil's beneficial properties and sustaining the region's ecosystem.