Chaw Chaw Sein, Bam HN Razafindrabe, Khin Me Me Aung
Much research has not been done on mixed deciduous forests in Myanmar. It is necessary to adopt suitable silvicultural operations to improve systematic and sustainable management of the mixed deciduous forests. In addition to this, the research aims to focus adequate information on the species composition and stand structure of the three different mixed deciduous forests in Alaungdaw Kathapa National Park. In each forest type, (1) ha plot was established and further divided into (8) subplots of 50 m x 25 m. The diameters at breast height (dbh) - 1.3 m above ground and heights of all the standing trees were measured and the data were analysed by Statistica software. The results show that Verbenaceae, Ulmaceae, Combretaceae, Mimosaceae families are found in all three different mixed deciduous forests having the larger number of species. The frequency class value and diversity indices and the species were more or less equally abundant as the value of evenness, E (%) closed to 1.0. The number of larger diameter classes in dry upper mixed deciduous forest is more than the rest two forests; the diameter class (201-250 cm) possesses the highest percentage of relative basal area in all three different mixed deciduous forests. The lesser number of highest trees are occurred in the lower mixed deciduous forest and gave a better regression coefficient and shape for all tree species of the three different mixed deciduous forest’s height curve. In order to conserve the Alaungdaw Kathapa National Park sustainably, strict policies and sustainable conservation plans such as gap and line enrichment planting should be implemented.
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