Effect of pruning and growth regulators on rose growth, flowering and pigments content [electronic resource]: III- pruning and kinetin application [electronic resource].

Includes references.

This study was carried out in order to enhance quality as well as quantity of the rose cut flower yield via pruning and kinetin application. This experiment was laid out in a split plot design as one-year-old rose plants "Rosa hybrida Cv Mercedes" planted in a plastic house were divided into two main plots. Branches oHhe first main plot were pruned in mid October 2000 after the 4th mature leaf, while the second one was pruned after the 6th mature leaf. Each plot was divided into four subplots. Each subplot was sprayed with kinetin (KIN) at 0, 150, 300 or 450 ppm. Three sprays were applied at monthly intervals, starting on November 20th , 2000. Treatments were repeated in the second season of 2001-2002. Results of this stndy could be snmmarized in the following: pruning degree did not affect number of immature leaves/plant and diameter of both flower stem and flower bud. Pruning at six leaf stage resulted in the highest number of bottom break/plant, number of flowers/m2 during summer, leaf content of chlorophyll a and petal content of carotene. Plants pruned at six leaf stage were the earliest to flower. On the other hand, plants pruned at four leaf stage had the longest flower stems and the highest leaf content of chlorophyll b.

Summary in Arabic.

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