EFFECT OF DAMINOZIDE AND FERTILIZER APPLICATION ON THE NUMBER OF BUDS AND INFLORESCENCES OF NEW ENGLAND ASTER GROWN UNDER THE SHORT PHOTOPERIOD CONDITIONS

U razdoblju 1992.-1994. istraživan je utjecaj dvije koncentracije daminozida- 2000 mg/l i 4000 mg/l, te prihrane 1.5%-tnom otopinom tekućeg mineralnog gnojiva na svojstva cvatnje ulončenog oštrolisnog zvjezdana- Aster novae-angliae \u27September Ruby\u27 uzgojenog iz vršnih i postranih reznica u uvjetima skraćenog fotoperioda. Kod biljaka uzgojenih iz vršnih reznica najveći broj pupova postignut je kombinacijom 4000 mg/l daminozida i prihrane pri čemu je u 1992. bilo 2,2 puta, a 1993. čak 6,3 puta više pupova nego u kontrolnoj varijanti. Primjena 4000 mgl/l daminozida u prvoj godini uzgoja utjecala je na povećanje broja cvatova za 27.6% i 41.7% kod biljaka uzgojenih iz vršnih odnosno postranih reznica. Tijekom istraživanja nije bilo smanjenja broja cvatova primjenom daminozida. Veći broj cvatova imale su biljke uzgojene iz vršnih reznica sa izuzetkom u posljednjoj godini. Primjena daminozida nema negativan učinak na cvatnju, te je s tog aspekta moguća njegova primjena kod ove trajnice.The aim of the trial run from 1992 to1994 was to investigate the effect of daminozide (2000 mg/l and 4000 mg/l) as well as of topdressing with a 1.5% solution of liquid mineral fertilizer upon the flowering of potted Aster novae-angliae \u27September Ruby\u27, grown from top and lateral cuttings under the short photoperiod conditions. The largest number of buds of plants grown from top cuttings was achieved with the combination of 4000 mg/l daminozide and fertilizer application, which in 1992 resulted in 2.2 and in 1993 in 6.3 times more buds than in the control variant. Application of 4000 mgl/l daminozide in 1992 influenced an increase in the number of inflorescences by 27.6% and 41.7% in plants grown from top and lateral cuttings, respectively. No reduction in the number of inflorescences due to daminozide application was recorded. Plants grown from top cuttings had a larger number of inflorescences except in 1994. Since daminozide has no adverse effect upon flowering, its application to this perennial is possible from this aspect

CHOICE OF PLANTS FOR ROOF GARDENS

Ograničena dubina supstrata, suša, vjetar, visoke temperature i slaba drenaža uvjeti su koje mogu podnijeti samo određene biljne vrste. Ovim radom se želi istaknuti one biljne vrste koje mogu uspijevati u specifičnim životnim uvjetima kakvi vladaju na krovu, a koje ujedno ispunjavaju kriterije održavanja te one estetske.A shallow growing medium, draught, wind, high temperatures and bad drainage are conditions in which only rare plant species can grow. The goal of this paper is to highlight and describe plant species that can survive and grow on roofs and match criteria of maintenance and aesthetics at the same time