Articles
CUTTING PROPAGATION OF SOME DWARFING ROOTSTOCKS FOR PERSIMMONS
Article number
601_19
Pages
145 – 149
Language
English
Abstract
Persimmon (Diospyros kaki) is a typical one of difficult-to-root woody species.
We selected some persimmon trees grafted on free stock seedlings that showed dwarfing habits, and harvested the root suckers sprouting from their roots.
For softwood cutting propagation, leaf-bud cuttings were prepared from the root suckers in summer, treated at their bases with 3000 ppm IBA solution for 5 sec, and planted in rooting medium in a greenhouse installed with a mist system.
When planted in late-June, 90-100 % of the leaf-bud softwood cuttings taken from the dwarfing rootstocks rooted in plug trays (200 ml/plug) as well as in 20-liter plastic netted baskets.
The type of rooting medium, Metro-Mix®360 or a mixture of Kanuma soil and peat moss (1:1, v:v), did not affect the rooting percentage.
When planted in late-August, 45 % of the cuttings from one of dwarfing rootstocks rooted, while 15 % of those from another one rooted.
For hardwood cutting propagation, cuttings were collected in December from the root suckers that had been mounded with rice husks to etiolate their bases since late-June, treated with 25 ppm IBA solution for 24 h, and planted in bottom-heated rooting medium in the greenhouse.
The rooting of hardwood cuttings was generally inferior to that of softwood cuttings, and the cutting grafting did not improve rooting.
However, when the scions were grafted 40-100 days after planting of the cuttings, the grafting was successful and the rooting percentage was higher than that of the ungrafted cuttings (33 % vs. 13 %). These grafted cuttings planted in late-February rooted better than those planted in late-January or late-March (55% vs. 15% or 30%). The leaf-bud softwood cuttings from the root suckers of D. kuroiwai, on which ‘Fuyu’ trees showed dwarfing habit, scarcely rooted (10 %).
We selected some persimmon trees grafted on free stock seedlings that showed dwarfing habits, and harvested the root suckers sprouting from their roots.
For softwood cutting propagation, leaf-bud cuttings were prepared from the root suckers in summer, treated at their bases with 3000 ppm IBA solution for 5 sec, and planted in rooting medium in a greenhouse installed with a mist system.
When planted in late-June, 90-100 % of the leaf-bud softwood cuttings taken from the dwarfing rootstocks rooted in plug trays (200 ml/plug) as well as in 20-liter plastic netted baskets.
The type of rooting medium, Metro-Mix®360 or a mixture of Kanuma soil and peat moss (1:1, v:v), did not affect the rooting percentage.
When planted in late-August, 45 % of the cuttings from one of dwarfing rootstocks rooted, while 15 % of those from another one rooted.
For hardwood cutting propagation, cuttings were collected in December from the root suckers that had been mounded with rice husks to etiolate their bases since late-June, treated with 25 ppm IBA solution for 24 h, and planted in bottom-heated rooting medium in the greenhouse.
The rooting of hardwood cuttings was generally inferior to that of softwood cuttings, and the cutting grafting did not improve rooting.
However, when the scions were grafted 40-100 days after planting of the cuttings, the grafting was successful and the rooting percentage was higher than that of the ungrafted cuttings (33 % vs. 13 %). These grafted cuttings planted in late-February rooted better than those planted in late-January or late-March (55% vs. 15% or 30%). The leaf-bud softwood cuttings from the root suckers of D. kuroiwai, on which ‘Fuyu’ trees showed dwarfing habit, scarcely rooted (10 %).
Publication
Authors
T. Tetsumura, R. Tao, A. Sugiura, Y. Fujii, S. Yoda
Keywords
cutting grafting, Diospyros kaki, Diospyros kuroiwai, hardwood cutting, leaf-bud cutting, root sucker, softwood cutting.
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