Hi gardeners, i'm wondering if the pine bark may consider a slow absorption fertilizer or at least just a fertilizer.

The reason why i'm asking this is 'cause I use to take some pine bark form the pines in my neighborhood and add it to the potting earth (substratum) and I assume it provides some nutrients making the substratum fertile for my pott vegetables.

Thanks for replying and I'm sorry about my not-so-good english.