STATISTICAL ANALYSIS OF SEEDLOT/ SITE INTERACTION OF AUSTRALIAN SPECIES IN FIELD TRIALS IN THAILAND

Abstract

The statistical analysis of 3-year meansurement of Australian species trials in Thailand have shown marked differences in height, diameter at breast height and survival for individual trials. Combination of individual trials to investigation of seedlot/site interaction had also hightly significant up to species adaptability. The study of the adaptation of all seedlot was facilitated by using a two-dimentional plot (scratter diagram), with mean yield (height, dbh) and regression coefficient which indicated Eucalyptus camaldulensis and E. pelita were the best of growth and stable across the sites, Acacia crassicarpa and A. auriculiformis were unstable and tend to do particularly well at high-yield environment sites, A. aulacocarpa which fall into two groups, Casuarina species and Melaleuca species have poor adaptabity at all sites.