Evaluation of Four Years Old Progeny Test of Shoreamacrophylla in PT Sari Bumi Kusuma, Central Kalimantan

AbstractShoreamacrophylla is a medium-sized tree or may become a large tree in favourable sites, with a straight, clean bole. In its natural habitat, a mature tree attains an average size of 50 m in height with a DBH of 120cm. Generally, this species isprotected from harvesting, because it produced non timber forest product thatis themost important source of the illipe nut. The other hand, S.macrophylla became extinct, that caused by degradation forest in tropical rain forest that increase time by time. To reduce this species extinction, one of activities was establishment progeny test S.macrophylla that could conserve and increase growth of S. macrophyllain the future. The research was conducted in PT Sari Bumi Kusuma forest consession. The research was established randomized completely block design (RCBD) design with 8 replications. Every replication consisted of 94 families as treatment and was planted in line plots with 5 tree plot/famili/block. Spacing trees was 6x3 m. The result of research in four years old of progeny showed that 94 family of S. macrophylla tested was significant in both high and DBH variable at tα 5%. Individual heritability values both DBH and height variable were 0.065 and 0.053. In other hand, family heritability values both DBH and height variable were 0.295 and 0.222. The highest and lowest growth both DBH and height variables were family number 26016 and 26049 respectivelly