Effect of Nutrient Solution and Nitrogen Concentration in Hydroponics by the Root Spray System on the Growth of 'Kyoho' Grapes

1998 Shokubutsu Kojo Gakkaishi  
We examined the influence of nutrient solution and N concentration in hydroponics by spraying the root growth of 1-year-old trees of 'Kyoho' grapes. The results demonstrated that the growth and quantity of the new root were the highest at EC 0.5 mS/cm nutrient solution. Influence of N concentration (the same rate of N types; NO3-N : NH4-N =2:1) on the quantity of the new root was not marked, however, a higher concentration, 20ppm, slightly increased the quality compared to 10ppm. " Twice-a-year
more » ... harvesting" culture("first crop" : sprouted on Jan. 17th. and ripened on May 30 th, "2nd crop" : sprouted on July 10 th and ripened on Oct. 30 th.) of 3-year-old 'Kyoho' was performed by this cultural system. As for the N concentration in the nutrient solution,the largest amount of shoot and berry growth was found at 20 ppm, and the least amount of shoot
doi:10.2525/jshita.10.194 fatcat:yzhtwr6fvvfcvlagcd3us5bxbu