Rotor blade for a wind power plant, wind power plant and method for the production of a rotor blade

A method for the production of a rotor blade (1) for a wind power plant that extends from a rotor blade root (2) substantially to a rotor blade tip (3), comprising the steps of:

• producing a one-part or multi-part shell (10, 10′, 14), at least partially from a fiber reinforced composite material,
• disposing at least one belt (9-9′″) in the rotor blade (1) substantially in the direction of a longitudinal extension of the rotor blade (1), and
• producing the at least one belt (9-9′″) from layers composed of a fiber reinforced composite material having fibers aligned unidirectionally in the direction of a longitudinal extension of the belt (9-9′″) and being joined to the one-part or multi-part shell (10, 10′, 14),
• wherein a thickness of the at least one belt (9-9′″) decreases toward the blade root (2) in a blade root side section, whose length is at least 3% of the entire length of the belt (9-9′″),
• wherein the shell (10, 10′, 14) is provided with at least one layer (13, 13′) of a fiber reinforced composite material having fibers aligned unidirectionally in the direction of the longitudinal extension of the rotor blade (1), and
• wherein the layer (13, 13′) extends at least in one section along the longitudinal extension of the rotor blade (1) from an airfoil leading edge (5, 45) to an airfoil trailing edge (6, 46) of the rotor blade (1).