Development of Recirculating Wick Hydroponic Techniques for Safe Seed Tuber Multiplication of Potatoe

摘要

This study was conducted to establish the proper techniques of the recirculating wick hydroponics for safe seed tuber proliferation of potatoes (Solatium tuberosum L. CV. Dejima). To achieve these, several intact tubers (5, 10 and 20 g) and cut seed-pieces (two or four) were treated in wick hydroponic system beds. A polystyrene box (31 cm in width, 20 cm in height, 51 cm in length, and 0.031 m3 in volume) was placed on a styrofoam box. Eight wicks (width 1.5 cm x length 40 cm) were put into each polystyrene box and the boxes were filled with perlite + peatmoss (1 :2, v/v) medium. Top fresh weight per plant increased with increasing the tuber size from 10 to 30 g/ tuber. As the tuber size increases from 10 to 30 g/tuber in case of uncut tuber, the marketable tuber (>5 g) production per plant increased from 83.8 to 141.8 g/plant and the marketable tuber (>5 g) production per plant of cut tuber was slightly higher than that of uncut treatment. Total tuber yield ranged from 4.16 to 6.56 kg/m~2 and thepercentage of seed tubers was greater than 97% for all treatments. These results indicate that seed tuber should be cut to produce large tuber (≥10 g) in the recirculating wick hydroponic system.