Rhododendron lapponicum culture medium as well as preparation method and application thereof

The invention relates to the technical field of rhododendron culture substrates, in particular to a rhododendron lapponicum culture substrate and a preparation method and application thereof. The culture medium comprises the following components in percentage by mass: 50%-70% of mushroom stick particles with the particle size of 5-10 mm, 20%-30% of mushroom stick particles with the particle size of 20-30 mm and 10%-20% of fermented rape seed cakes. The waste mushroom sticks and the fermented rape seed cakes are selected as raw materials, residual nutrient substances in the waste mushroom sticks and the rape seed cakes are fully utilized for growth of the alpine rhododendron, meanwhile, the mushroom stick particles with different particle sizes are utilized for achieving the water retention and ventilation characteristics of the culture medium, and the culture medium is wholly slightly acidic and is more suitable for growth and development of the alpine rhododendron; compared with the traditional rhododendron