Abstract
The morphological characteristics of roots of cold-resistant cultivars, 'Sayamakaori' and 'Komakage', were investigated in the 2nd year after planting (December, 1988). 'Yabukita' and 'Okumidori' were used as the standard and the reference cultivars, respectively.
The results are summarized as follows.
1)'Sayamakaori' was significantly superior in the weight of lignified roots in 0-20 cm depth to the other 3 cultivars.
2)'Komakage' was significantly superior in slender-root weight in 60-70 cm depth to the other 3 cultivars. In general, roots of 'Komakage' were long, and the longest root was about 1 m long.
3)The root characteristics of the 2 cultivars mentioned above seem to be favorable to cold-resistance.
