Scientific data about the competitive effects of broadleaves on pine in young stands is required to assist policy and resource practitioners with relevant management decisions. Retrospective trials have provided data that was used to update the free growing guidelines for some of the IDF, SBPS and SBS subzones, but more information is needed to further refine existing guidelines and modify them for other biogeoclimatic subzones. Relationships between pine and aspen in the IDFxm and SBSdw2 are described in two new publications. Light assessments within the aspen canopies provided data on relationships between two zones in the Cariboo and aspen stands in the boreal forests. Data collection has continued in the SBSdw1 and SBPSxc trials where a variety of aspen densities in pine plantations are being studied. Additionally growth and yield plots for calibration of PrognosisBC were established in the SBSdw1 trial. Combined study results from these different biogeoclimatic zones will show the differences in growth and development of mixed pine aspen stands across different ecological environments.
Newsome, Teresa A.. 2004. Competitive effects of broadleaf trees on lodgepole pine and a comparison of broadleaf and conifer performance on a range of ecosystems: FII Forest Research Program 2003/04 annual progress report. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2004MR192