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KMID : 1041219910330020063
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Journal of Sericultural and Entomological Science
1991 Volume.33 No. 2 p.63 ~ p.67
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Hardwood Cutting with Callusing in the Mulberry(Morus bombycis Koidz.)
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Abstract
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Various concentrations of α-naphthalene acetic acid(NAA) as a root-promoting substance were tested in hardwood cutting of the mulberry (Morus bombycis Koidz., cultivar : Shinkwangppong) to make clear the callusing effect on the budding and root growth. Budding and shoot growth of cutting were delayed at high concentrations of NAA within 10 days of callusing. Especially more severe is it at higher than 50 ppm. More than 93% of them, however, budded in two weeks when callused at less than 100 ppm NAA. Although rooting was accelerated at high concentration of NAA from the bigining of cutting, after that rooting percentage increased to reach 100% in 35 days of cutting in any concentration except 150 ppm with relatively low rooting. Root growth was utmostly accelerated at 50 ppm NAA to show the highest amount in number, length and weight of roots per cutting although high concentration of it decreased mean root length.
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