Sopiana: Respons Viabilitas Benih Kopi Arabika (Coffea ... Jurnal AIP Volume 6 No. 1│ Mei 2018: 9-18 9 Respons Viabilitas Benih Kopi Arabica (Coffea arabica) terhadap Pelumuran Jamur Trichoderma viride di Pre-nursery (Viability Response of Arabica Coffee [Coffea arabica ] Seed to Trichoderma viride Excision in Pre-nursery) Emi Sopiana 1) , M. Tahir 2)* , Albertus Sudirman 2) 1) Program Studi Produksi dan Manajemen Industri Perkebunan Politeknik Negeri Lampung dan 2) Jurusan Budidaya Tanaman Perkebunan Politeknik Negeri Lampung, Jl. Soekarno-Hatta No. 10 Rajabasa, Bandar Lampung, 35144, Telp.: (0721) 703995, Fax.: (0721) 787309 E-mail: tahir@polinela.ac.id ABSTRACT Indonesia is the fourth largest coffee producing country in the world after Brazil, Vietnam, and Colombia. This study aims to obtain an optimal rate of Trichoderma viride on coffee seed viability, to obtain the highest growth of Arabica coffee clones, and to obtain interaction between rate of Trichoderma viride and Arabica coffee clones on viability of coffee seeds. The research was conducted in Nursery Farm, State Polytechnic of Lampung from October to December 2016. This research use factorial randomized block design (RBD). The first factor was the Arabica coffee clone i.e. Sigarar Utang clone and S 795 clone. The second factor was the rate of Trichoderma viride fungi culture i.e.O 0 (without Trichoderma viride fungi culture), O 1 (100 g Trichoderma viride fungi culture), O 2 (200 g of Trichoderma viride fungi culture), O 3 (300 g of Trichoderma viride fungi culture). The variables observed included seed growth rate, germination rate, cotyledon rupture rate, hypocotyl height, hypocotyl diameter, normal sprouts, leaf area, root dry weight, and leaf dry weight. If there is a significant difference in α 0,05, then the test is continue with the least significance difference test (LSD). The best treatment of Trichoderma viride fungi rate was 200 g can increase seed growth rate for 12 days, germination rate 80,28%, and hypocotyl height 7,15 cm. The highest treatment in the Sigarar Utang clone can increase the height of hypocotyl 7,15 cm and the leaf area 14.39 cm 2 . Keywords: Arabica coffee seed, Trichoderma viride fungi culture, seed growth rate DOI: http://dx.doi.org/10.25181/jaip.v6i1.656 Diterima: 3 Januari 2018 / Disetujui: 20 April 2018 / Diterbitkan: 19 Mei 2018 PENDAHULUAN Kopi merupakan salah satu tanaman komoditas perkebunan yang berperan penting bagi perekonomian nasional, khususnya sumber pendapatan dan devisa negara. Indonesia tercatat sebagai produsen kopi terbesar keempat di dunia setelah Brazil, Vietnam, dan Kolombia (Baso & Anindita, 2018). Pada tahun 2012/2013 terjadi peningkatan produksi kopi terbesar mencapai 9,19 juta ton, musim 2013/2014 terjadi penurunan produksi sebesar minus 1,8% dari periode sebelumnya menjadi 9 juta ton (PKPLN, 2014). Rendahnya produktivitas kopi rakyat disebabkan oleh sebagian besar tanaman kopi sudah tua, berasal dari varietas lokal/asalan yang dikembangkan oleh masyarakat, sebagian besar jenis bibit berasal dari bahan tanaman biji sapuan (tanpa pemilihan