濃縮海洋深層水の高品質トマト水耕栽培への有効利用 : 1. 果実品質に対する短期施用の効果

概要

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The deep seawater is a profitable natural resource with the stable advantages of low temperature, nutrient-rich and purity and has been applied to many kinds of industry and product. In the processes producing the mineral-enriched table salt and drinking water from the deep seawater, the concentrated deep seawater is abundantly discharged, which is highly enriched in not only Na+ but useful minerals such as Mg2+, K+ and Ca2+, etc. Therefore, effective application of the concentrated deep seawater has been required, and in this study, a suitable application of the concentrated deep seawater to the production of high quality tomato was examined. Tomato plants (Lycopersicon esculentum Mill.) were grown by soil-less culture with the nutrient film technique (NFT), where the short-term salt stress was induced by applying the concentrated deep seawater. For only two weeks at the stage of rapid fruit growth, the concentrated deep seawater was added to the standard nutrient solution to increase the electric conductivity of the nutrient solution from 1.2 to 13.5 dS m-1. From physiological analyses of the fruit quality, it was suggested that the short-term salt stress treatment with the concentrated deep seawater at the stage of rapid fruit growth can bring high quality fruits enriched in sugar, minerals and good flavor without occurrence of extremely small-sized fruits and blossom-end rot.
生態工学会の論文
2006-07-30