[Rockwool cultivation of roses. Comparative study of the lenghtening kinetics of flowering stems and of the productivity of two types of stocks: minigrafted and propagated in vitro]

crecimiento croissance crop yield culture hydroponique dimension dimensions fleur flores flowers growth hydroponics laine de roche lana mineral modele modelos models rendement des cultures rendimiento de cultivos rockwool rosa stems tallo tige velocidad velocity vitesse