Enhanced rooting of Spiraea thunbergii Sieb. soft-wood cutting on the bed covered with plastic film

abri plastique arbustos ornamentales buildings construcciones developmental stages dicotiledoneas dicotyledons economic plants enracinement enraizamiento equipment equipo etapas de desarrollo etapas de desarrollo de la planta methode methods multiplication des plantes ornamental plants ornamental shrubs plant developmental stages plant propagation plantas plantas ornamentales plante plante ornementale plants plastic film covers protective structures rooting rosaceae rosales structure de protection vegetative propagation