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

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height (cm) Figure 8– Lettuce grown in Floating Raft system over the experimental time period in each media type. Lettuce Growth Rate in the NFT The average heights for each week were plotted on a line graph to depict growth in each medium (Figure 9). Soil was the most effective medium for lettuce in the NFT method as assessed by average height over time. Lettuce grown in the soil showed much growth in the 8 weeks, with an average finished height of 18.12 cm. Lettuce grown in soil showed only a small amount of growth over the 8 weeks. Plants grown in gravel showed only a small amount of growth with only 1 cm of growth over the experiment. (STAND DEV) 20 18 16 14 12 10 8 6 4 2 0 1 2 3 4 5 6 7 8 time (weeks) Gravel Fiber Soil Figure 9- Lettuce grown in NFT system over the experimental time period in each media type. Radish Weights in the Floating Raft System To obtain the weights of the plants, a SCALE Was used. The majority of weight for the radish plants came from the leaves/shoots (Table 1). Radishes grown in soils showed the greatest average total weight, above ground weight, and below ground weight.
Table 1- Average biomass for radishes in Floating Raft (STAND DEV) MEDIA TOTAL (g) SHOOTS (g) ROOTS (g) GRAVEL 5.86 4.41 1.44 FIBER 0.60 0.38 0.22 SOIL 8.74 7.10 1.64 Radishes Weights in the NFT There were no plants to weigh at the end of the experiment for radish plants grown in gravel (Table 2). Almost all of the total weight for the radish plants grown in soil comes from the shoot of the plant and the root represents a very small proportion of the total plant. The overall biomass of radishes grown in fiber is much less than those grown in soil, but still most of the weight comes from the shoot of the radish plant. Table 2- Average biomass for radishes in the NFT MEDIA TOTAL (g) SHOOTS (g) ROOTS (g) GRAVEL 0 0 0 FIBER 0.09 0.07 0.01 SOIL 17.81 17.68 0.13 For total weights of radishes in the floating raft system there was a strong significant difference in plants grown in soil compared to plants grown in fiber (Table 3). There was also a strong significant difference when plants grown in fiber were compared to plants grown in
Page 1 and 2: Plant Growth in Aquaponic System th
Page 3 and 4: minimizing nutrient inputs and the
Page 5 and 6: There are many different medias in
Page 7 and 8: Figure 4 - Lettuce plant grown in t
Page 9 and 10: number that corresponded to a pot o
Page 11 and 12: of this time difference, because it
Page 13: height (cm) height (cm) 25 20 15 10
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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