Pistokkaiden juurrutusajan ja juuriston pituuden vaikutus krysanteemin kehitykseen

Authors

• Erkki Kaukovirta Helsingin yliopiston puutarhatieteen laitos, Viik, Helsinki

DOI: https://doi.org/10.23986/afsci.71654

Abstract

An experiment was carried out to study the effect of propagation time and length of root system on the development of chrysanthemum, variety ’Paradise’. Two propagation times were tested; 10 days and 16 days. Rooted cuttings were graded into three length groups according to the length of the root system. The length groups were as follows: A – length of root system less than 3.5 cm, B » » » » 3.5—5.0 cm, C » » » » over 5.0 cm. In this experiment the propagation time had a significant effect on the development of chrysanthemum, variety 'Paradise'. The weekly growth of plants of the 10-day propagation period was greater than that of plants of the 16-day propagation time. Also the final length and weight of the flower stalks was greater on the former than in the latter (Tables 1 and 2). The length of the root system did not affect the actual growth rate of the plants significantly. However, the relative growth rate decreased significantly when the length of the root system increased (Fig. 2). The number of flowers per stem and the diameter of the first flower were greater on the plants of the 16-day propagation period than on plants with a 10-day propagation time (Table 3 and Fig 3). This effect, however, might be due to too early a short day treatment so that the younger plants were not in a condition to react to flower stimulus as favourably as the plants in the 16-day propagation treatment.