STUDI PERTUMBUHAN TIGA JENIS TANAMAN CEPAT TUMBUH SAMPAI UMUR 47 BULAN PADA TEGAKAN MURNI DAN CAMPUR DI RIAM KIWA, KALIMANTAN SELATAN

Agus Pratomo, Atmodjo Thojib, Soedjoko Dirjosoemarto

1992 | Skripsi | S1 KEHUTANAN

The three kinds of fast growing species were Acacia mangium Willd, Gmelina arborea Roxb, and Paraserianthes falcataria (L) Nielsen. The mixed stands were established by planting two of three fast growing with proportion of 50 50 %, while the spacing was 2m x 4 m. In this research the randomised completely block design was used. The measurements were conducted at the age of 3, 11, 23, 35 and 47 months. The observed parameters included survival, height, diameter of breast height and crown diameter. The result showed that the growth of A. mangium in mixed A . mangium x G.. arborea, at the age of 47 months, were 14 % higher 25 % bigger in dbh and 34 % wider in crown diameter than in pure stand . G. arborea in mixed G. arborea x A . mangium reached 51 % higher, 46 % bigger in. dbh and 28 % wider in crown diameter than in pure stand. The result also showed that P. falcataria in mixed P. falcataria x A. mangium reached 43 % higher, 10 % bigger in dbh and 12 % wider in crown diameter than in pure stand. The continuations of silvicultural research are needed ultimately to the mixed stand of G. arborea x A. mangium because it is a promising one.

Kata Kunci : Acacia mangium, Gmelina arborea, Paraserianthes falcataria