Keywords :
Productivity, Dry, evergreen forest
บทคัดย่อ :
The productivity (Biomass) in a successional series of former Swidden (rai) derived from
the destruction of Dry Dipterocarp Forest in northeastern Thailand were investigated in the fall of
1976 at the Forest Experiment Station at Sakaerat Swidden of 1, 3, 6, 9 and 20 + years following
the last crop were sampled. For comparison, a second-growth forest of indeterminate age was
sampled in the same area. All former Swidden though 20 + years supported stands of Saccharum
sponteneum with varying amount of either or both Imperata cylindrica and/or Eupatorium
odoratum as Co-dominants. The biomass of these three species was roughly comparable during 9
yrs of succession, varying from 7.7 Mt./Ha to 16.1 Mt./Ha. with a mean of 12.3 Mt./Ha.(dry
weight). By 20 + yrs., the biomass of these 3 species amounted to 7.8 Mt./Ha. but wood species
had become dominant with a biomass of 39.2 Mt./Ha (dry weight). In contrast, the biomass of the
second-growth forest was 269.6 Mt./Ha (dry weight).
เอกสารอ้างอิง :
Drew, W. B., S. Aksornkoae, S. Kaitpraneet. 1978. An assessment of productivity in successionnal stages abandoned swidden (RAI) to dry evergreen forest in northeastern Thailand. For. Res. Bull. 56, Faculty of Forestry, Kasetsart University, Bangkok.
