COMPARING SALT TOLERANCE OF EUCALYPTUS CAMALDULENSIS WITH OTHER FAST-GROWING TREES

Abstract

ABSTRACT

Study on salt tolerance of forest tree species under different Nace concentrations have been carried out at Northeast Forest Tree Seed Centre, Khon-Kaen province. The levels of Nace concentrations were 0, 0.5, 1.0, 1.5 and 2.0% which mixed with complete nutrient solution (Hoagland). Five forest tree species have been done which were Leucaena Leucaena leucocephala, Acacia auriculiformis, Anacardium occidentale, Azadirachta indica and Eucalyptus camaldulensis. Each treatments has 4 replications which have been planted in beer bottle which cut the bottom out by using the top part that added vermiculite as media and connected with filter rope as absorbtion. One end of the rope was at the beer bottle in medium and the other was at one liter coffee bottle in solution. After three months, the results were found that biomass of these species decreased when salt concentrations increased. Tap and root of all trees grew slowly. A few new leaves appeared and they had thick leaves and short roots. The shoot: root ratio of Leucaena, Acacia, Anacardium and Azadirachta species at Nace concentration 0.5-1.0% is lower than control and 1.0-2.0% but Eucalyptus camaldulensis at level 0.5% -1.0% is higher than control and 1.0-2.0% Survival percentage of Eucalyptus camaldulensis under 2.0% Nace concentration at age three months was 0%.