Way to extract those carbohydrates from vegetables

[Jason49]

I own a mushroom business. In this business we grow oyster mushrooms. Oyster mushrooms life of carbohydrates so I need a way to extract those carbohydrates from vegetables.

 

[Borek]

I doubt using just pure carbohydrates would work. And what carbohydrates, in what form? Are you sure you will be able to make it cheaper than the market price?

 

[Jason49]

The mushrooms grow on logs mad of grass and spawn. The log produces its amount of mushrooms and then dries out. Now I want to inject the carbohydrates into the log to refuel it.