Edaphic Features Of Comilla Sal Forest Of Bangladesh With Consequences To Global Climate Change
Physiochemical properties of soils of both naturally growing Sal and mixed planted forest of Comilla at two different locations viz. Kotbari and Rajeshpur were analyzed during June 2014 to May 2015. Three visits were done during this period. Soil samples were collected from both Sal forests and 14 variables were analyzed. The pH value was lower in both forests (4.40) and so were calcium and phosphorus. The maximum values of moisture content, sodium, potassium, magnesium, manganese, Iron, zinc, organic matter, nitrogen and phosphorus were 20.4%, 29.25 µg/g, 6.923 µg/g, 239.0µg/g, 92.50µg/g, 6295µg/g, 40.0µg/g, 3.362%, 0.021% and 3.99% respectively. The higher levels of soil nutrients in the forest were due partly to reduction in the loss of top soil and partly to the increased supply of nutrients in the form of leaf litter and biomass from the larger number of sal trees and their seedlings. Plantation of different species has been found to have no effect on the organic C and total N content of the soil. The soil of the forests of Comilla showed low nitrogen content indicating lower level of N-mineralization thus have low positive feedback to global warming.
Index Terms- Physicochemical properties, calcifuges soil, limiting factor, low positive feedback,