ISHS Acta Horticulturae 79: Symposium on Propagation and Raising of Nursery Stock
CULTURAL FACTORS AFFECTING THE ESTABLISHMENT OF FRUIT ROOTSTOCK HARDWOOD CUTTINGS |
| Authors: | B.H. Howard, N.J. Cheffins |
| Abstract:
Cuttings of rootstocks, such as the Prunus pseudocerasus x P. avium hybrid Colt, that develop preformed roots during the previous growing season establish readily when planted into the field without further treatment. Cuttings of some plum and quince rootstocks establish well when planted into the field in autumn following IBA treatment; in dry conditions treatment with an antidesiccant is advantageous. Apple cuttings propagate less readily than cherry, plum and quince stocks and need both IBA treatment and stimulation in heated bins during late winter. Establishment is positively related to increased root stimulation from increasing concentrations of IBA, but prolonged bottom heat increases rooting to the detriment of subsequent establishment because carbohydrates are excessively depleted. Developing buds create an alternative sink for carbohydrates and planting should take place prior to bud break. Cold storage of cuttings prior to root stimulation may also accentuate bud activity to the detriment of establishment. Adverse soil conditions can be ameliorated by regulating soil moisture with polythene sheeting prior to planting, or by backfilling the planting trench with spent bin compost from the heated bins so that shrinkage cracks do not develop along the planting line to the detriment of the establishing cuttings. | |
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