Résumé
A field trial was conducted during two consecutive seasons [2004/2005 and 2005/2006] at the Exerimental Nursery of the Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, Egypt, to investigate the effect of fertilization with NPK, organic and biofertilizers on growth, flowering and composition of Jasminum sambac plants. NPK [N: P205: K2O] at the rate of 40 g/pot/season was applied at 5 g/pot for eight months. Three different kinds of organic fertilizers were applied namely, compost at a rate of 175 cm[3]/pot/season. Camel manure at a rate of 175 cm[3]pot/season, biogas at a rate of 60 kg/N/feddan/season Biofertilizer [Biogramina] was applied at a rate of 75 ml/pot/season. NPK fertilizer caused significant increases in vegetative growth parameters. NPK alone or in combination with organic fertilizer lenanced root parameers, chlorophyll-a, b and carotenoids content. Biogas combined with biofertilizer [Biogramina] gave the best results of flowering parameters while, total carbohydrates, N, P and K contents were increased by organic fertilizer. It could be concluded that biofertilizer [Biogramina] alone delayed flowering