The interaction of daily lighting period and light intensity on growth of some greenhouse plants [also incl. Kalanchoe, Begonia hiemalis, Hedera helix, Pelargonium hortorum, Chrysanthemum morifolium]

altura artificial light begonia bourgeon buds chambre de croissance chrysanthemum crassulaceae fitotrones fleur floraison flores flowering flowers fotoperiodismo greenhouses growth chambers hauteur hedera height invernaderos light regimes lighting luz artificial pelargonium peso photoperiodicity poids regimenes de luz serre stems tallo tige weight yema (planta)