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.
본 실험은 작물의 양』분 흡수율에 근거하여 배추과 엽채류 수경재배에 적합한 배양액을 개발하고자 수행되었다. 원예연구소 배양액(NSH액) 1배액을 기준으로 1/2배액, 1배액, 3/2배액으로 25일간 담액 수경재배 했을 때 청경채와 겨자채는 3/2배액, 케일은 1배액에서 생육이 좋았다. 작물의 양수분 흡수율을 산정하여 얻은 평균 양이온 비는 K $49.5\%$, Ca $35.8\%$, Mg $14.7\%$ 였으며, 배추과 작물에 적합한 배양액 N 14, P 3, K 6.8, Ca 4.8, Mg 2m${\cdot}L^{-1}$을 개발하였다 개발 배양액을 평가하기 위해 2003년 9월부터 2004년 10월까지 공시 작물을 4회 재배하였다. 개발 배양액에서 작물을 재배했을 때 빠른 상대생장률과 함께 생육이 $1.1\~2.5$배, 비타민 C 함량은 $1.06\~l.52$배 증가하였다. 개발 배양액에 적합한 작물로는 겨자채 'Asia curled', 'Asia redcurled' 및 'Pamagreen', 케일 'TBC', 'Portugal' 및 'Manchu collard', 잎브로콜리 'New green', 천경채, 방울다다기양배추 'Green king'와 'Red king', 홍채태, 쌈추 등으로 생육과 항산화 성분인 비타민 C함량 증가를 통해 기능성 엽채류 생산이 가능하였다.
