Dampak Kebakaran Hutan Terhadap Sifat Fisika dan Sifat Kimia Tanah di Kabupaten Samosir

Abstract

PURNAMA SARI SAGALA. The impact of forest fires on the Nature Physics and Soil Chemical Properties in Samosir. Under academic supervision by DENI ELFIATI and DELVIAN. Forest damage caused by forest fires could make a great harm. This result aims to determine the impact of forest fires on the physical properties and chemical soil. The result was conducted in May-July 2014. The soil samples were taken in Samosir, North Sumatra. Soil analysis carried out in the Central Laboratory of the Faculty of Agriculture, University of North Sumatra. The results showed the type of fires are fires canopy. After the pH value of forest fires is not too increased in 5-year period of surly be a fire that is slightly acid-neutral. Changes in content of organic C, total N, available P, P-Total, Ca, Mg after burned relatively small. The content of KTK, K, Na increased after the fire. This occurs because of the influence of soil type and soil pH. Warming caused by fire does not change the type of soil texture and color of the soil. Bulkdensity relatively small after the forest fire. Soil moisture former forest fires larger than unburned soil.