J. Technology and Education, Vol.30, No.2, pp.21-26 (2023)

研究論文

レタス水耕栽培における乳酸菌資材の添加効果について

 

栗原　頌¹，有田　翔², 高山　勝己^*1

¹福井工業高等専門学校　物質工学科（〒916-8507福井県鯖江市下司町）

²ベルテクス株式会社（〒102-0083　東京都千代田区麹町五丁目7番地2）

*takayama@fukui-nct.ac.jp

 

The effect of lactic acid bacteria addition on hydroponic cultivation of lettuce

 

Sho KURIHARA,¹ Sho ARITA,² and Katsumi TAKAYAMA^*1

¹Department of Chemistry & Biology Engineering, National Institute of Technology, Fukui College

(Geshi-cho, Sabae 916-8507, Japan)

²VERTEX Co., Ltd.

 (5-7-2 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan)

 

(Received May 31, 2023; Accepted June 26, 2023)

 

Abstract

Hydroponic cultivation in plant factories has been widely introduced, especially for leafy vegetables such as lettuce and herbs. This is due to the relatively easy prevention of plant pathogens and pests, easy control of nutrient content, and easy control of environmental factors such as humidity, temperature, and lighting. Improving the functional components such as vitamins and amino acids contained in vegetables and increasing the yield per unit area are extremely important for increasing the profitability of plant factories.

The purpose of this study is to investigate the effects of adding lactic acid bacteria (Enterococcus sp. HS-08), which was developed by the VERTEX corporation, on the growth and yield of lettuce in hydroponic cultivation. As a result, we confirmed the following: (1) Adding lactic acid bacteria to the hydroponic nutrient solution has little negative effect on the recommended physicochemical conditions (pH, EC, and ORP) for lettuce cultivation. (2) The application of lactic acid bacteria improves the germination rate of lettuce seeds. (3) Its application possibly promotes lettuce growth and suppresses the accumulation of nitrate ions in the leaves after long-term cultivation.

Keywords:  plant factory, hydroponic cultivation, lettuce, lactic acid bacteria, growth promotion, inhibition of nitrate accumulation, germination rate