Pengaruh Volume dan Jenis Media Tanam pada Pertumbuhan dan Hasil Tanaman Selada (Lactuca sativa) dalam Teknologi Hidroponik Sistem Terapung

Abstract

The objective of this study was to find out the effect of volume and source of growth media on lettuce growth and yield in Deep Pool Growing System (DPGS). The study was conductedfrom September to December 2003 at Deep Pool Growing System facility, Danasworo Hydro-Garden Ciapus, Bogor. The study was arranged in randomized completely block design with two factors. First factor was volume of growth media (20 cm3 and I I0 cm3). The second factor was source of growth media (synthetic foam, cocodust, rice-husk+OSF and rice-husk+cocodust). Medium volume of 20 cm3 with rockwool was used as a check. Nutrient composition of the solution was as follows (ppm): Ca 177, Mg '24, K 210, NHJ125N, Oi233, SO, 113, andPO, 60, Fe2.14, B 1.2, Zn 0.26, Cu 0.048, Mn0.18, and Mo 0.046. Medium volume of 20 cm3 with synthetic foam obtained the best yieldfor all parameters. Therefore, this treatment could replace rockwool as medium for lettuce production in DPGS.