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 highlyefcient oil producers. It produces ve to seven timesmore vegetable oil per hectare than soybean, sunower,and rapeseed. The objectives of this research were tostudy the role of organic and N, P, and K fertilizers ongrowth of one-year-old immature oil palm on marginalsoil in Jonggol. The research was conducted at IPBCargill Teaching Farm (ICTF) of Oil Palm, Jonggol,Bogor,West Java from March 2013 to March 2014. Theexperiment was arranged in a factorial experimentfollowing a randomized block design with threereplications. The rst factor was organic fertilizer(manure) consisting of 0 (O), 15 (O1) and 30 (O2) kg pertree per year. The second factor was inorganic fertilizerconsisting of 0 (S0); 0.25 kg N + 0.25 kg P O + 0.39 kg 2 5K O(S ) 0.50 k N+ 0.50 kg P O + 0.78 kg K O(S ) 2 25 2 1and g 2per tree. The results demonstrated that application ofmanure up to 30 kg per tree per year did not affect thegrowth 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 theresult in increasing frond production, stem girth, and leafnutrient concentration. The results of leaf analysis andplant growth responses suggested that the rates ofmanure and inorganic fertilizers applied in this study arenot sufcient to improve young oil palm growth inmarginal soil in Jonggol.Keywords: cow manure, critical nutrient level, inorganicfertilizer, soil fertility, vegetative growth

Pengaruh Konsentrasi dan Lama Fermentasi Urin Sapi sebagai Pupuk Cair pada Pertumbuhan Bibit Karet (Hevea brasiliensis Muell. Arg.)

“…Berbagai jenis protein tertentu memerlukan unsur fosfor sebagai bahan mentahnya. Fosfor juga berfungsi untuk membantu asimilasi dan pernafasan, sekaligus mempercepat pembungaan, pemasakan biji dan buah (Marviana & Utami, 2014;Sudradjat et al, 2014 Hasil analisis pendahuluan kandungan K total pada urin sapi pada perlakuan F 0 , F 1 , F 2 , dan F 3 relatif sama (0,012 %). Namun relatif lebih rendah dibandingkan dengan perlakuan (0,014 %).…”

Respons Pertumbuhan Tanaman Kelapa Sawit (Elaeis guineensis) Belum Menghasilkan Umur Dua Tahun terhadap Pemupukan Kalsium

“…(Campbell et al, 2008). Laju pertumbuhan tinggi pada penelitian sebelumnya 7.4 cm bulan -1 meningkat menjadi 15.36 cm bulan -1 sedangkan pertumbuhan lingkar batang 4.8 cm bulan -1 menurun menjadi 2.35 cm bulan -1 , hal ini sesuai dengan Pahan 2013 dapat menyebabkan produksi 2.5 pelepah pbulan -1 (Sudradjat et al, 2014). Panjang pelepah kesembilan TBM-2 kelapa sawit menunjukkan hasil yang tidak berpengaruh nyata terhadap perlakuan pemupukan unsur Ca pada 15-26 BST.…”

Vegetative Growth Response of Entog Dwarf Coconut (Cocos Nucifera L.) to Different Planting Hole Size and Compound Inorganic Fertilizer Application

“…Compound NPK fertilizer significantly increases frond production, stem circumference, leaf area, and frond length [5]. The application of NPK fertilizer has a significant effect on the growth of plant height, leaf width, number of leaves, leaf length and leaf area, which is due to the content of nutrients such as Nitrogen, Phosphate, and Potassium which can be translocated to all parts of the plant for the formation of new organs [6].…”