Our goal is to improve conifer seedling survival and growth so that planted seedlings will reach the "free to grow" stage sooner. It is at this stage when the exponential growth trajectory towards mature conifer tree cover begins. We are applying a natural plant biostimulant during forest nursery culture to improve the development of root growth potential, which is expressed after planting on restoration sites. We are first determining the rate of biostimulant to apply (tree species dependent) and assessing its physiological effects on seedlings in a CFS research nursery (greenhouse, outplanting beds, and growth chambers). Next, we will be collaborating with a commercial forest nursery to implement the new practice.  Seedlings from this nursery will be outplanted on linear features with annual measurements over a 5-year period, in collaboration with an oil and gas end user.

This study will provide forest nurseries with a novel tool for production of designer, summer-planting conifer seedlings with enhanced root growth for caribou habitat restoration. These seedlings with enhanced root growth will improve rates of survival and growth compared with current rates.  Our goal is to share this knowledge with nurseries across Canada growing conifer seedlings for boreal caribou habitat restoration and with various end-users.

Organization:
Natural Resources Canada (NRCan)