Interaksi Pemberian Pupuk Controlled Release dengan Soil Conditioner terhadap Pertumbuhan Vegetatif dan Serapan Hara Nitrogen serta Fosfor Bibit Kelapa Sawit

Abstract

The aim of the study is to determine the effect of controlled release fertilizer application, soil conditioner and the
interaction of these two treatments on vegetative growth and nutrient uptake nitrogen and phosphorus of oil palm
seedlings. The experiment was conducted in Research Department of First Resources Ltd, Riau in April 2013 until
January 2014. Research design of the study used a randomized complete block design (RCBD) two factors with 3
replications. The first factor was the controlled release fertilizer application/CRF (P) as follows: P1: SR NPKMg 15-15-
6-4, P2: CRF NPKMg 17-8-9-3, P3: CRF NPKMg 18-8-8-2, P4: CRF NPKMg 20-6-14-3. The second factor was the
application of soil conditioner (H) is H0 : Control, H: Liquid formulations of Bacillus sp, H2: Humic acid granular
formulations, H3: Liquid formulations endopalma. The results showed that fertilization treatment CRF NPKMg 20-6-14-
3 is treatment that gives the higher all vegetative growth parameters and all nutrient uptake parameters. Soil conditioner
treatment granular humic acid gives the higher for crown dry weight, root dry, root volume and plant height. Interaction
of CRF NPKMg 20-6-14-3 with control gives the higher for seed quality index, number of leaves, stem diameter, leaf area
and nutrient uptake parameters include nitrogen and phosphorus.