Abstract
This study was conducted to investigate the usefulness of jellyfish（Aurelia aurita）supernatant for cherry-tomato（Lycopersicon esculentum Mill）and tomato（Solanum lycopersicum）cultivation. Cherry tomatoes and tomatoes were cultivated with the periodic addition of supernatant solutions of jellyfish to the culture soil. For control plots, the same volume of water was added to the soil instead of the supernatant solution. Seawater was used similarly for comparison in tomato cultivation. After harvesting the cherry tomatoes and tomatoes, their weights were measured. Then, sugar and ascorbic acid（AsA）content in the cherry tomatoes were determined. For tomatoes, acidity was ascertained instead of AsA. The sugar content and AsA concentration for cherry tomatoes cultivated using jellyfish were 13 ％ and 18 ％ higher than those for the control plots, respectively, although the fruit weight of the former was 23 ％ less than that of the latter. The sugar content and acidity of tomatoes cultivated using jellyfish were 16 ％ and 15 ％ higher, respectively, than those cultivated with seawater, although the former had 19 ％ less fruit weight than the latter. Results show that using jellyfish for cherry-tomato and tomato cultivation was effective to improve fruit quality.
