Establishment of a method of raising pot plants in tea [Camellia sinensis] hydroponics, 1: Choosing the optimal starting time and pot material
2007
Kondo, T.(Shiga-ken. Agricultural Technology Promotion Center, Azuchi (Japan))
In Shiga Prefecture, due to its relatively cool area it is difficult to raise 1-year pot plants for tea production of equivalent quality to those raised in warmer districts. To establish a new technology for raising good 1-year pot plants based on hydroponics, which enables the efficient utilization of fertilizer components to increase total growth, we investigated various conditions concerning starting time and material for hydroponics. As a result, pot plants raised by hydroponics from 2 to 3 months after cutting had greater root weight and showed better growth of the underground part than paper pot plants. When polystyrene pots for hydroponics (width 9 cm, length 9 cm, height 15 cm) were used with surrounding black-and-white mulching to shade the seedlings ' root zone, young shoot weight and root weight of the pot plants increased remarkably. In the experimental plot where hydroponics was started 2 months after cutting, the mean root weight was 3.8 times heavier than that of those grown in paper pots. Furthermore, when black polyethylene pots (diameter 9 cm, height 20 cm) were used in place of the polystyrene pots, better results were obtained in terms of the growth of seedlings and set plants; therefore, use of reusable black polyethylene pots was thought to be better from a practical viewpoint.
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