PHYSIOLOGICAL STUDIES ON TWO Chrysanthemum spp

Abstract

A series of pot experiments were conducted at the Experimental Farm in the Faculty of Agriculture at Kafr EI-Sheikh during two Sllcccssive .seasons to study the effect of N-fet1ilization on growth, •flowering and chemical composition of two important Clu:vsrmthemwn spp. i.e. Ch1J 1.mnthemum leucamhemum, L. and Clu:vsanthemum parlhenium. (L.) Bern h. The fertilization of each experiment was added in seven levels of nitrogen (ammoniu111 sulphate 20.5% N), 0. I, 2. 3, 4, 5 and 6 g/pot. potassium and phosphorus fertilizers were added as a constant rate of 0.5 and 2 g/plant from potassium sulphate (48.5% K 20) and calcium supcrphosphlc (15.5% P2 05). The fertilizer devoted to each pot in the first experiment (marguerite) W<lS monthly repeated for five times at one month interval as the first was added one month after while the last was before cutting stems. The fertilization treatments of the second experiment (feverfew) was as those in the first experiment but thC fertilizer was monthly rcpc::Hcd for four times at one month interval. The first was added one month aflcr transplanting while the last was before flowering. The obtained results mny led to the following: I. To produce the best Clnysanthemum /eucanlhemum plants having the highest number of offshoots. the largest leaf area/plant. heaviest fresh and dry weight of roots, earlier flowering tallest growth height at flowering. thickest flowering stem diameter, highest number of infloresenccs on the main stem, highest inflorescence diameter, heaviest fresh and dry weight of top infloresenees, longest vase. life as well as highest total chlorophyll! NP and K% in the leaves they shoulbe fertilized with 4 g ammonium sulphate (20.5% N)/pot. 2. To produce the best Chrysanthemum parrheniwn plants having the tallest plant height, the highest number of branches/plant, highest leaf area/plant, heaviest fresh and dry weight of the vegetative parts. longest roots. heaviest fresh and dry weight of roots, earliest flowering, highest number of inflorescences/plant. largest inflorescence diameter, heaviest fresh and dry weight of roots, earliest flow ring. highest number of inflorescences/plant. largest inflorescence diameter. heaviest fresh and dry weight of infloresences/plant. highest oil percentage in fresh lenves and dry infloresences. as well as highest total chlorophyll. N, P and K% in the leaves they should be fertilized with 4 g ammonium sulphate (20.5% N)/pot.