Mushrooms are generally cultivated using organic substrates and therefore scientists have searched different methods of using the spent substrate for growing different plants. Spent substrate of Agaricus bisporus has been used for asparagus, beetroot, onion, potato, radish and many more plants and has proved itself to have nutritional qualities.
In India, SMS has been used with success as “manure”. It’s converted to a liquid fertilizer and used on the soil. Also, the spent substrate of Pleurotus has been evaluated as a potential biofertilizer.
Mushroom cultivation may be easily combined with permaculture design models in order to create a functional system based on individual elements that rely upon each other. The spent substrate plays a key role in such systems in which mushrooms are grown the sustainable way together with plants in a strong alliance (see picture below). This means that may be efficiently combined with household gardening on a small scale or crops that generate agricultural waste.
The spent mushroom substrate may be also used to grow worms. I was not surprised when visiting a mushroom farm I saw a couple of containers filled with shiitake spent mushroom substrate fed to worms. Worms are great agents to aerate soil to ensure optimal plant growth.