Pemberian Kompos Tandan Kosong Kelapa Sawit dan Zat Pengatur Tumbuh Alami terhadap Pertumbuhan Bibit Kelapa Sawit (Elaeis guinensis Jacq.) di Pembibitan Utama Menggunakan Medium Subsoil Ultisol

Abstract

This research aim was to study the effects of applying oil palm empty fruit bunches compost and natural growth
regulator substances on growth palm oil ( Elaeis guineensis Jacq.). This research was conducted in screen house of
Agricultural Faculty, University of Riau, from December 2012-April 2013. Subsoil ultisol was taken from Kulim Region
Pekanbaru. Soil chemical properties of ultisol material was analyzed at Soil Laboratory of Soil Research Bogor. This
research used a split plot design as the main plot was natural growth regulator substances and subplot was oil palm
empty fruit bunches compost consists of 3 treatments in the main plot and 4 in the subplot. The treatments in the main
plot: Z0 = without natural growth regulator, Z1 = natural growth regulator substances using banana corm, Z2 =
natural growth regulator subtances using bamboo shoots. The treatments in subplot: T0 = without oil palm empty fruit
bunches compost, T1 = 20 tons per ha of oil palm empty fruit bunches of compos, T2 = 30 tons per ha of oil palm empty
fruit bunches of compos, T3 = 40 ton per ha of oil palm empty fruit bunches of compos. The result showed that application
of oil palm empty fruit bunches compost 20 tons per ha, without or with natural growth regulator subtances increased
plant height, number of leaves and diameter hump.