Pengaruh Kombinasi Media Tanam dan Varietas Terhadap Terhadap Pertumbuhan dan Hasil Tanaman Tomat (Lycopersicum esculentum Mill) Secara Hidroponik Substrat (Effect of Combination of Media Cultivation and Varieties Against Against Plant Growth and Yield of Tomato (Lycopersicum esculentum Mill) By Hydroponic Substrates Abstrak. Pengaruh Kombinasi Media Tanam dan Varietas terhadap Pertumbuhan dan Hasil Tanaman Tomat (Lycopersicum esculentum Mill) secara Hidroponik Substrat. Penelitian ini bertujuan untuk mengetahui kombinasi terbaik media tanam dan varietas terhadap pertumbuhan dan hasil tanaman tomat secara hidroponik substrat. Penelitian dilaksanakan di Kebun Percobaan Fakultas Pertanian, Universitas Syiah Kuala yang berlangsung sejak Januari sampai Mei 2014. Penelitian ini menggunakan Rancangan Acak Kelompok pola faktorial 3 x 3 dengan tiga ulangan. Penelitian ini terdiri dari dua faktor, faktor pertama yaitu kombinasi media tanam terdiri dari kombinasi pasir + arang sekam, pasir + serbuk gergaji, pasir + sabut kelapa. Faktor kedua yaitu varietas tomat yang terdiri dari varietas Hibrida (Peto-seed), Unggul (Ratna) dan Lokal (Kaliurang). Parameter yang diamati adalah tinggi tanaman dan diameter batang masing-masing pada umur 15, 30, dan 45 hari setelah tanaman (HST), jumlah bunga pertanaman umur 60, 67, 74, 81 dan 88 HST, serta jumlah buah total dan bobot total buah pertanaman. Hasil penelitian menunjukkan bahwa media tanam berpengaruh sangat nyata terhadap diameter pangkal batang umur 15 dan 30 HST, jumlah bunga pertanaman umur 60, 67, 74, 81 dan 88 HST, jumlah buah total pertanaman dan bobot buah total pertanaman, berpengaruh nyata terhadap tinggi tanaman umur 15 dan 30 HST, dan diameter pangkal batang umur 45 HST. Namun berpengaruh tidak nyata terhadap tinggi tanaman umur 45 HST. Pertumbuhan dan hasil tanaman tomat terbaik dijumpai pada media tanaman pasir + arang sekam. Varietas berpengaruh sangat nyata terhadap jumlah bunga umur 67 dan 81 HST, jumlah buah total pertanaman dan bobot buah total pertanaman. Namun berpengaruh tidak nyata terhadap tinggi tanaman dan diameter pangkal batang umur 15, 30 dan 45 HST. Pertumbuhan dan hasil tanaman tomat terbaik dijumpai pada varietas hibrida (Peto-sedd). Terdapat interaksi yang sangat nyata antara media tanam dan varietas terhadap jumlah buah total pertanaman dan berpengaruh tidak nyata terhadap peubah lainnya. Interaksi terbaik yaitu kombinasi perlakuan media tanam pasir + arang sekam dan varietas hibrida (Peto-sedd). Kata kunci :Tomat, Media Tanam, Varietas, Hidroponik Substrat. Abstract. Effect of Combination and Varieties Growing Media on the Growth and Crop Tomato (Lycopersicum esculentum Mill) in hydroponic substrate. This study aims to determine the best combination and variety of growing media on growth and yield of tomato plants in hydroponic substrate. Research conducted at the Experimental Farm, Faculty of Agriculture, University of Syiah Kuala, which lasted from January to May 2014. This study used a randomized block design 3 x 3 factorial design with three replications. This study consisted of two factors, the first factor is the combination of growing media consisting of a combination of sand + rice husk, sand + sawdust, sand + coconut coir. The second factor is composed of tomato varieties Hybrid varieties (Peto-seed), Superior (Ratna) and Local (Ground). Parameters measured were plant height and trunk diameter respectively at 15, 30, and 45 days after plant (HST), the number of flower planting age of 60, 67, 74, 81 and 88 days after planting, as well as the number of total fruit and total weight of the fruit planting. The results showed that growing media very significant effect on the diameter of the stem ages of 15 and 30 DAT, the number of flower planting age of 60, 67, 74, 81 and 88 days after planting, the number of total fruit crop and the weight of total fruit crop, significantly affected plant height age 15 and 30 DAT, and diameter at base age 45 HST. But no real effect on the plant height age of 45 HST. The growth and yield of tomato plants best seen in medium sand + husk. Varieties very significant effect on the amount of interest the age of 67 and 81 days after planting, the total number of fruit crops and fruit weight total crop. But no real effect on plant height and diameter at base age of 15, 30 and 45 days after planting. Growth and yield of tomato plants best seen in hybrid varieties (Peto-sedd). There is a very real interaction between the growing media and varieties of the total number of fruit crops and no real effect on other variables. Best interaction that combined treatment of the planting medium sand + rice husk and hybrid varieties (Peto-sedd). Keywords: omatoes, Growing Media, varieties, hydroponic substrate.