Broadleaves and Mixedwood Management Research

Broadleaves and mixedwoods are a significant part of B.C.'s forested ecosystems, offering shelter and forage for many wildlife species and contributing to the overall biodiversity of this unique province. In addition, they are a renewable resource that provides employment opportunities now and in the future. Our research concentrates on interactions between various broadleaf tree species and the surrounding vegetation.

Research

British Columbia has a long history of silviculture research in broadleaf and broadleaf-conifer mixedwood management with established field trials as early as 1935. 

 
Broadleaf Tree Species Experimental Projects* Area
Red Alder 62 Coastal
Bigleaf Maple 15 Coastal
Trembling Aspen 43 Interior
Paper Birch 38 Coast and Interior
Cottonwood 17 Coast and Interior

*Historic number of Experimental projects (EP’s) containing reference to a broadleaf tree species including projects focused on broadleaf – conifer mixedwood management.

Experimental Projects - Coast

Red Alder

Experimental Project # Title # Inst. Year Established
262 Cowichan Lake Alder Growth and Yield: Thinning of a naturally regenerated alder stand 1 1935
343 Thinning Experiments in Pure Even-Aged Red Alder Stands – Cowichan Lake 1 1948
412 Cumshewa Inlet alder growth and yield 1 1946
1121.01 Studies of interactions between coastal hardwoods and conifers 4 1992
1140 Hardwood Silviculture Cooperative: Stand tending regimes for red alder 7 1989
1266.01 Development and application of the red alder growth model (TASS-Dr) NA 1994

Experimental Projects - Interior

Trembling Aspen

Experimental Project # Title # Inst. Year Established
1107 An autecological study - interaction of white spruce and trembling aspen in the Peace River of British Columbia 2 1989
1080 Effect of Aspen Competition on Survival and Growth of Lodgepole Pine and White Spruce 1 1989
1114 Investigations of planting of white spruce under a trembling aspen canopy 6 1991
1133 Thinning and fertilization trials in trembling aspen/balsam poplar stands in Prince George Forest Region 2 1991
1148 Long Term Soil Productivity (LTSP) – Dawson Creek site; aspen and white spruce  1 1991
1152 Assessing Aspen-Pine competition in young stands in the Cariboo Forest Region 8 1992
1192.01 An Evaluation of Brushing and Spacing Treatments - Growing Space Management in Boreal Forest Mixedwoods 1 1995
1266.03 Development and application of the trembling aspen growth model (TASS-At) NA 2001
1266.04 Boreal and sub-boreal broadleaf-conifer mixedwood interactions 6 2013
1269 Pine Aspen Mixedwoods 3 1999
1391 Effects of Operational Brushing on Conifers and Plant Communities in the Southern Interior 14 1991

Experimental Projects - Coast and Interior

Paper Birch

Experimental Project # Title # Inst.  Year Established
1089 Managing hardwoods in the Kamloops Forest Region 12+ 1990
1121 Studies of interactions between coastal hardwoods and conifers 2 1999
1193 Effects of spacing of paper birch on the growth of birch and understory conifers 4 1994
1391 Effects of Operational Brushing on Conifers and Plant Communities in the Southern Interior 27 1991