Influence of Manure, Nitrogen, Phosphorus and Potassium Fertilizer Application on Growth of One-year-old Oil Palms on Marginal Soil in Jonggol, Bogor, Indonesia

Abstract

The oil palms (Elaeis guineensis Jacq.) are highly
efcient oil producers. It produces ve to seven times
more vegetable oil per hectare than soybean, sunower,
and rapeseed. The objectives of this research were to
study the role of organic and N, P, and K fertilizers on
growth of one-year-old immature oil palm on marginal
soil in Jonggol. The research was conducted at IPB
Cargill Teaching Farm (ICTF) of Oil Palm, Jonggol,
Bogor,West Java from March 2013 to March 2014. The
experiment was arranged in a factorial experiment
following a randomized block design with three
replications. The rst factor was organic fertilizer
(manure) consisting of 0 (O), 15 (O1) and 30 (O2) kg per
tree per year. The second factor was inorganic fertilizer
consisting of 0 (S0); 0.25 kg N + 0.25 kg P O + 0.39 kg 2 5
K O(S ) 0.50 k N+ 0.50 kg P O + 0.78 kg K O(S ) 2 25 2 1and g 2
per tree. The results demonstrated that application of
manure up to 30 kg per tree per year did not affect the
growth of one-year-old oil palm. Application of 0.50 kg N
+ 0.50 kg P O + 0.78 kg K O highest 2 5 2 per tree gave the
result in increasing frond production, stem girth, and leaf
nutrient concentration. The results of leaf analysis and
plant growth responses suggested that the rates of
manure and inorganic fertilizers applied in this study are
not sufcient to improve young oil palm growth in
marginal soil in Jonggol.

Keywords: cow manure, critical nutrient level, inorganic
fertilizer, soil fertility, vegetative growth