Impact of fire on soil and plants at Phu Kradung National Park
1996
Kuengnit Sutthichat
Impact of fire on soil and plants at Phu Kradung National Park was conducted in dry dipterocarp forest, mixed deciduous forest, pine forest, dry evergreen forest and hill evergreen forest at Phu Kradung National Park, Changwat Loei in 1994 by experimental fires. For each forest type, before and after burning, number of trees, saplings and seedlings were investigated in three sets of plots of 10*10 square m, 4*4 square m and 1*1 square m in size of each and three sets soil samples were also collected. The purposes of the study were to investigate changes of soil properties and plants after burning. The result revealed that after burning, soil properties of all forest types showed similar changing trend : soil moisture, bulk density and particle density were decreased but porosity, pH, organic matter, phosphorus, potassium, calcium, magnesium and cation exchange capacity were increased. Fire showed no effect on trees but it did affect on saplings in dry dipterocarp forest, mixed deciduous forest, pine forest except dry evergreen forest and hill evergreen forest. After burning, seedlings of all forest types were completely dead.
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