I.P. Gautam, K.P. Upadhyay, D.N. Sah and B. Khatri
Agriculture Research Station, Lumle, Nepal Agriculture Research Council

DOI

ABSTRACT

The experiment was conducted in a RCBD with two factorial treatments arrangement. Five rootstocks grown in five poly-pots represented a treatment and it was replicated thrice. The mixtures of different ratio of soil, FYM and sand were filled in 13*7 cm size of poly pots. Seedlings of trifoliate rootstocks were transplanted in poly pots on 17th May, 2001. The effect of different potting mixture combinations and urea concentrations showed a non significant different in height of trifoliate rootstock. However, different concentration of urea spray showed a significant difference in height. The highest rootstock height (34.06, 36.63 and 41.48 cm) was observed in the treatment N4(3.5 g urea/lit. water sprayed at one month interval) after 4, 5 and 6 months of potting respectively. Also there was a significant difference in collar diameter of trifoliate rootstocks due to different ratio of potting mixtures. The largest collar diameter (0.68 cm) was observed due to treatment SP2(containing 2 part soil: 1 part FYM: 3 part sand) after 6 months of potting. However, the effect of urea spray and their combination with potting mixtures showed no significant difference in collar diameter. From this experiment, it is concluded that proper potting mixtures in combination with urea spray will be imperative in raising appropriate size of trifoliate rootstocks for grafting purposes in optimum time period.