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Development of Nutrient Solution for Hydroponics of Cruciferae Leaf Vegetables Based on Nutrient-Water Absorption Rate and the Cation Ratio  

Choi Ki Young (Northern Kyungbuk Region Bio Industry Innovation Center, Dong yang Univ.,)
Yang Eun-Young (Division of Vegetable, National Horticultural Research Institute, RDA)
Park Dong-Kum (Division of Vegetable, National Horticultural Research Institute, RDA)
Kim Young Chul (Division of Vegetable, National Horticultural Research Institute, RDA)
Seo Tae Cheol (Division of Vegetable, National Horticultural Research Institute, RDA)
Yun Hyung Kweon (Division of Vegetable, National Horticultural Research Institute, RDA)
Seo Hyo Duk (Division of Vegetable, National Horticultural Research Institute, RDA)
Publication Information
Journal of Bio-Environment Control / v.14, no.4, 2005 , pp. 289-297 More about this Journal
Abstract
This study was conducted to develop the suitable nutrient solutions for variable Cruciferae leafy vegetables. l/2, 1 and 3/2 strength of nutrient solution recommended by National Horticultural Research Institute were supplied to plants in deep flow technique systems during 25 days. The growth of pak-choi and leaf mustard 'Asia curled' was highest in the 3/2 strength, and kaie 'TBC' in the 1 strength. Mean cation ratio of nutrient solution for pak-choi, leaf mustard and kale was K $49.5\%$, Ca $35.8\%$ and Mg $14.7\%$, which was obtained by calculating the uptake rates of water and nutrients. Suitable composition of the nutrient solution for Cruciferae leafy vegetables was N 14, P 3, K 6.8, Ca 4.8, $Mg 2m{\cdot}L^{-1}$. To examine the suitability of nutrient solution developed for Cruciferae vegetables (NSC), plants were grown 4 times from Sep. 2003 to Oct. 2004. When plants were grown in NSC, relative growth rate increased 1.1 to 2.5 times and vitamin C content 1.06 to 1.52 times. The proper plants to apply NSC for functional leaf vegetable production were leaf mustard 'Asia recurled', 'Redcurled' and 'Pamagreen', kale 'TBC', 'Portugal' and 'Hanchu collard', leaf broccoli 'New green', pak-choi, baby cabbage 'Red king' and 'Green king', flowering red chinese cabbage and Korean cabbage.
Keywords
baby cabbage; flowering red chinese cabbage; functional leaf vegetable production; kale; Korean cabbage; leaf broccoli; leaf mustard; pak-choi; relative growth rate; vitamin C content;
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