Plant Growth in Aquaponic System through Comparison of Different ...

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ADD PARAGRAPH: kind of plants that are grown in hydroponics, indicate that the same plants will work in aquaponics Radishes are edible members of the Brassicaceae (Figure 3). Radishes require even and moderate to heavy watering and prefer full sun, but can tolerate partial shade (Denckia, 2003). They require low levels of nitrogen, phosphorus, and potassium. They do best in cool, moist soil and a pH between 6.0 and 7.0. Radishes germinate between 4 to 12 days. Figure 3 – Radish plant grown in soil in the NFT system at 7 weeks. Lettuce belongs to the Asteraceae (Figure 4). It does not require a lot of water, but it does need moderate water consistently and, like radishes, prefers full sun, but can tolerate partial shade (Denckia, 2003). Lettuce plants require high levels of nitrogen, phosphorus, and potassium. The lettuce plant has a relatively shallow, compact root system that does not absorb nutrients and moisture from the soil very efficiently. The optimum soil pH is between 6.5 and 7.0. The plant typically germinates within 7 to 14 days.
Figure 4 – Lettuce plant grown in the soil in the NFT system at 7 weeks. In this experiment, lettuce and radishes were grown in three different media to determine which media=um resulted in the greatest plant performance. Each plant type was grown in soil, gravel, and coconut fiber as different treatments. Also, two different aquaponic systems were used; the NFT and the floating raft system. The goal for this experiment was to determine which crop and which medium yielded the greatest growth performance. Methods Study Site This experiment was conducted at Lynchburg Grows, located in Lynchburg, VA, (3724’13’’N 7910’12’’W), is an urban farm that practices sustainable agriculture techniques. There are a total of nine greenhouses with one dedicated to aquaponics. The construction of the Nutrient Film Technique system was completed in September of 2011 and the construction of the floating raft system was completed in October of 2011.
Page 1 and 2: Plant Growth in Aquaponic System th
Page 3 and 4: minimizing nutrient inputs and the
Page 5: There are many different medias in
Page 9 and 10: number that corresponded to a pot o
Page 11 and 12: of this time difference, because it
Page 13 and 14: height (cm) height (cm) 25 20 15 10
Page 15 and 16: Table 1- Average biomass for radish
Page 17 and 18: along with plants grown in gravel a
Page 19 and 20: soil and lettuce grown in coconut f
Page 21 and 22: into the water, providing the plant
Page 23: References Denckia, T.L.K. (2003).

Plant Growth in Aquaponic System through Comparison of Different ...

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