Assessment the growth and yield of some provenances Melaleuca leucadendra is planting in acid sulphate soil at Experiment Station, Thanh Hoa district, Long An province

Abstract

Research on applying techniques for intensive planting of Melaleuca
leucadendra for supply of large timber estimated in 2014 at Thanh Hoa
Forestry Experiment Station, Thanh Hoa District, Long An Province. The
study was carried out with 3 provenances including Weipa origin. Qld (origin code 1201), Cambridge G. WA (origin code 1206) and Kuru PNG origin (origin code 1208). The experiment was designed in the sub-plot type with 3 replications. The main plot area is 400 m2 arranged for tree origins and included of 4 sub-plots of planting densities (M0: 15,000 trees/ha; M1: 7,500 trees/ha; 4,500 trees/ha and 2,250 trees/ha). The results of the study showed that after 4 years of planting, the provenance has the highest survival rate is 1208, followed by 1201 and 1206. Regarding the growth of diameter to age 4, the density of M0, M1 and M3 is different significancy (P < 0.05) in which provevances 1208 and 1206 were greater than 1201, height growth according to the same density also had significant differences (P < 0.05), in which the best height of provenance is 1208 and the lowest is 1201. The standing tree
stock at the age of 4 with the same density has no statistically significant difference (P > 0.05) and the growth form of all three origins go up in  straight line from 1 to 3 years of age and increases rapidly at the age of 2 to 3 years then decreases. The average yield at the age of 4 year old showed that origin 1208 proved to the best of yield according to all experimental treatments of M0; M1; M2 and M3 respectively 29.12 m3, 24.72 m3, 24.66 m3 and 17.24 m3; followed by origin 1201 was 27.35 m3, 22.88 m3, 20.27 m3 and 13.18 m3; origin 1206 was 26.84 m3, 23.39 m3, 18.14 m3and 9.92 m3