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Abstrak . Kopi merupakan bahan minuman yang memiliki aroma, rasa dan khasiat yang khas biji kopi mengandung kafein, kafein banyak digunakan dalam bentuk obat, makanan dan minuman produksi kopi dipengaruhi oleh teknik budidaya tanaman kopi salah satunya bagian pemupukan. Penelitian ini bertujuan untuk mengetahui pengaruh jenis pupuk organik cair pada berbagai konsentrasi terhadap pertambahan pertumbuhan vegetatif kopi arabika. Penelitian ini dilaksanakaan di Kebun Rakyat Desa Keudah Penosan Sepakat Kecamatan Blangjerango Kabupaten Gayo Lues dari bulan April sampai Juni 2018. Penelitian ini menggunakan Rancangan Acak Kelompok pola faktorial 2 x 4 dan 3 ulangan, sehingga terdapat 24 satuan percobaan pada hasil uji F yang signifikan dilanjutkan dengan uji Beda Nyata Jujur taraf 5%. Faktor pertama adalah jenis pupuk organik cair dengan 2 taraf yaitu: pupuk organik cair nasa dan pupuk organik cair mol Faktor kedua adalah konsentrasi dengan 4 taraf yaitu, 2, 4, 6, dan 8 cc L -1 air. Parameter yang diamati adalah pertambahan pertumbuhan tinggi tanaman, pertambahan pertumbuhan diameter pangkal batang, pertambahan pertumbuhan panjang cabang Plagiotrop, pertambahan pertumbuhan jumlah daun cabang plagiotrop dan pertambahan pertumbuhan jumlah cabang. Hasil penelitian menunjukkan bahwa jenis pupuk organik cair nasa berpengaruh nyata terhadap pertambahan pertumbuhan tinggi tanaman umur 90, pertambahan pertumbuhan diameter pangkal batang umur 60 hari dan pertambahan pertumbuhan jumlah cabang plagiotrop umur 90 hari. Konsentrasi berpengaruh nyata terhadap pertambahan pertumbuhan panjang cabang plagiotrop umur 90 hari konsentrasi terbaik yaitu 2 cc L -1 air pada jenis pupuk Mol dan tidak terdapat intraksi nyata. The Effect Type of Liquid Organik Fertilizer at Varius Consentration Vegetative Growth Arabica Caffea ( Coffea arabica L.) Abstract. Coffee is a beverage that has the aroma, taste and special quality. Coffee beans contains caffeine, caffeine is widely used as medicine, food and beverages. Coffee production is influenced by coffee cultivation techniques, one of the techniques is fertilization. This study aims to determine the effect of types of liquid organic fertilizer in various concentrations on the increasing of vegetative growth of arabica coffee. This research was carried out at citizenry plantation, Keudah Penosan Sepakat Village, Blangjerango District, Gayo Lues Regency from April to June 2018. This study used a Factorial-Randomized Block Design 2 x 4 and 3 replications and there were 24 experimental units. The results of the significant F test is continued by Honest Real Difference test level of 5%. The first factor was the type of liquid organic fertilizer with 2 treatments : Nasa liquid organic fertilizer and mol liquid organic fertilizer. The second factor was concentration with 4 treatments : 2, 4, 6, and 8 cc L-1 water. The parameters observed were the increase of plant height growth , stem root diameter growth, plagiotropic branch length growth, the number of leaves of plagiotropic branches growth and the number of branches. The results showed that the type of liquid organic fertilizer had a significant effect on the increase of plant height 90 DAP, the increase of stem root diameter growth and the increase of the number of plagiotropic branches 90 DAP. Concentration has a significant effect on the increase of the plagiotropic branch length 90 DAP. The best concentration is 2 cc L-1 water with Mol fertilizer and there was no real intraction.

Pengaruh Jenis Pupuk Organik Cair Pada Berbagai Konsentrasi Terhadap Pertambahan Pertumbuhan Vegetatif Kopi Arabika (Coffea arabica L.)