Abstract
This study aims to determine the effect of EC value (Electrical Conductivity) which is able to provide the best production of Red Lettuce (Lactuca sativa L.) Red Rapid Variety on the Floating Raft Hydroponic System. The experiment was conducted in a green house located in Sukaluyu Village, Telukjambe Timur District, Karawang Regency, from October to December 2016. The study used a randomized block design, consisting of 4 treatments, repeated 6 times, namely A (EC 0.5 - 1.5 mS / cm), B (EC 1.5 - 2.5 mS / cm), C (EC 2 , 5 - 3,5 mS / cm), D (EC 3,5 - 4,5 mS / cm) Data were analyzed using analysis of variance and further tests with Duncans multiple range test at 5% level. The number of plants for each treatment plot was 6 plants. The experimental results show that different EC (Electrical Conductivity) values have significantly different effects on the average plant height, 7, 14, 21, 28, 35 and 42 HST, the average number of leaves 21, 28, 35 and 42 HST , average stem diameter 7, 14, 21, 28, 35 and 42 days, average leaf area per plant, and average fresh weight per plant. The EC value of 3.5 - 4.5 mS / cm gives the highest production on the average fresh weight per lettuce plant (158.66 g), equivalent to 31.73 tons / ha.
Highlights
This study aims to determine the effect of EC value (Electrical Conductivity) which is able to provide the best production of Red Lettuce (Lactuca sativa L.) Red Rapid Variety on the Floating Raft Hydroponic System
Pengaruh Volume dan Jenis Media Tanam pada Pertumbuhan dan Hasil Tanaman Selada (Lactuca Sativa) Pada Teknologi Hidroponik Sistem Terapung
Summary
Pengamatan Penunjang Selama percobaan berlangsung, suhu udara berkisar antara 24 0C - 46 0C dengan rata-rata 35 0C, suhu tersebut kurang optimum untuk pertumbuhan tanaman selada merah, sedangkan kelembaban relatif antara 75% - 99% dengan rata-rata 87%. Keadaan pH nutrisi berkisar 4,83 – 7,41 dengan rata-rata 6,12. Selama percobaan berlangsung terdapat serangan OPT diantaranya, Busuk akar merupakan penyakit yang disebabkan oleh patogen Pythium sp. Penyakit busuk daun choanephora disebabkan oleh Choanephora cucurbitarum traxter. Infeksi pertama terjadi pada titik tumbuh, bunga, dan pucuk daun, selanjutnya infeksi menyebar ke bagian bawah tanaman. Pucuk daun berubah dari warna hijau menjadi warna cokelat, lalu hitam dan akhirnya membusuk. Rata-rata tinggi tanaman selada (Lactuca sativa L.) varietas red rapid umur 7, 14, 21, 28, 35, dan 42 hst. Keterangan : Angka rata-rata yang diikuti oleh huruf yang sama pada setiap kolom yang sama tidak berbeda nyata menurut uji Duncan pada taraf 5%
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