The research was aimed to gain the information about the effect of the root growth regulator and the media of plantation of the succeed ang the growth of Adenium sp. The research was conducted at the green house at Faculty of Agriculture, North Sumatera University, Medan with altitude + 25 above the sea level, from June to October 2008. The research was used the Completely Randomized Design with 2 factors. The first factor was the root growth regulator (Rootone F) with 4 degree e.g R0 (0 ppm),R1 (100 ppm), R 2 (200 ppm), R 3 (300 ppm), and the second factor was the media of plantation with 3 kinds of the media of plantation e.g M1 (sand + top soil with the ratio 2 |: 1), M 2 (sand + kascing with the ratio 2 : 1), M 3 (sand + husk with the ratio 2 : 1). The results show that the inundation with the root growth regulator has the significant effect on the amount of bud, bud́̀̀̀̀̀̀̀̀’s length at 12 and 14 weeks after the plantation, the amount of leaf, root’s length, the wet weight of root, the wet weight of bud, and the dry weight. The media of plantation treatment has no significant effect on all parameters. The interaction of both factors has the significant effect on the amount of primary root.
Penelitian ini bertujuan untuk mengetahui pengaruh zat pengatur tumbuh akar dan media tanam terhadap keberhasilan dan pertumbuhan setek kamboja jepang. Penelitian dilaksanakan di rumah kaca Fakultas Pertanian, Universitas Sumatera Utara, Medan dengan ketinggian tempat lebih kurang 25 m dpl pada bulan Juni sampai Oktober 2008. Penelitian ini menggunakan Rancangan Acak Lengkap Faktorial dengan dua faktor perlakuan. Faktor pertama adalah zat pengatur tumbuh akar (Rootone F) dengan empat taraf yaitu : R0 (0 ppm/ kontrol); R1 (100 ppm); R2 (200 ppm); R3 (300 ppm) dan faktor kedua adalah media tanam dengan tiga jenis yaitu : M1 ( Pasir + top soil /2:1 ); M2 (Pasir + kascing /2:1); M3 (Pasir + arang sekam /2:1). Hasil penelitian menunjukkan bahwa perlakuan perendaman zat pengatur tumbuh akar berpengaruh nyata terhadap jumlah tunas, panjang tunas 12 dan 14 MST, jumlah daun, panjang akar, bobot basah akar, bobot basah tunas, bobot kering akar dan bobot kering tunas. Perlakuan media tanam berpengaruh tidak nyata terhadap semua parameter. Interaksi antara kedua perlakuan berpengaruh nyata terhadap jumlah akar primer.
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