Penelitian ini dilakukan untuk mempelajari pengaruh penggunaan media tanam tertentu yang dikombinasikan dengan jenis pemupukan terhadap pertumbuhan dan hasil bawang merah. Penelitian ini dilaksanakan di kebun percobaan Agroteknologi Universitas Trunojoyo Madura di musim penghujan pada bulan Desember 2018 – Februari 2019. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dan perlakuan yang diberikan adalah kombinasi antara media tanam tertentu dengan Liquid Organic Biofertilizer (LOB). Data pengamatan dianalisis dengan menggunakan ANOVA dan dilanjutkan dengan uji Beda Jarak Nyata Duncan (BJND) pada taraf 5%. Hasil penelitian menunjukan bahwa aplikasi kombinasi media tanam dan penggunaan Liquid Organic Biofertilizer (LOB) memberikan pengaruh yang nyata terhadap beberapa variabel pengamatan, diantaranya adalah tinggi tanaman 5-7 MST, jumlah daun 6 MST, jumlah akar, panjang akar, bobot segar umbi per tanaman, bobot kering umbi per tanaman dan diameter umbi. Penggunaan media tanam campuran tanah dan kompos serta tanah dan arang sekam yang dikombinasikan dengan Liquid Organic Biofertilizer dapat menggantikan penggunaan pupuk NPK pada media tanam campurn tanah dan kompos serta tanah dan arang sekam pula. Kata Kunci : Media Tanam, Liquid Organic Biofertilezer (LOB), bibit bawang merah varietas Rubaru, pertumbuhan dan hasil produksi.

This research was conducted to study the effect of using certain growing media combined with fertilization on the growth and yield of shallots. This research was conducted in the Agroteknologi University Trunojoyo Madura experimental garden in the rainy season in December 2018 - February 2019. This study used a Randomized Block Design (RBD) and the treatment given was a combination of certain planting media with Liquid Organic Biofertilizer (LOB). Observation data were analyzed using ANOVA and continued with the Duncan Real Distance Difference test (BJND) at the level of 5%. The results showed that the combination application of planting media and the use of Liquid Organic Biofertilizer (LOB) had a significant influence on several observation variables, including plant height 5-7 MST, number of leaves 6 MST, number of roots, root length, fresh weight of tubers per plant , tuber dry weight per plant and tuber diameter. The use of a mixture of soil and compost and soil and husk charcoal combined with Liquid Organic Biofertilizer can replace the use of NPK fertilizer in soil-mixed planting media and compost as well as soil and charcoal as well. Keywords: Planting Media, Liquid Organic Biofertilezer (LOB), seeds of Rubaru variety onion, growth and production

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