Regeneration of hardwoods in variable retention harvest systems - the EMEND experienceReport as inadecuate

Regeneration of hardwoods in variable retention harvest systems - the EMEND experience - Download this document for free, or read online. Document in PDF available to download.

Variable retention harvest systems, Regeneration, Hardwoods

Additional contributors:

Subject-Keyword: Variable retention harvest systems Regeneration Hardwoods

Type of item: Report

Language: English



Description: EFM Research Note 03-2010

Date created: 2010

DOI: doi:10.7939-R3R785Q70

License information: Creative Commons Attribution-Non-Commercial 3.0 Unported


Author: Lieffers, V.J. Gradowski, T. Landhäusser, S.M. Sidders, D. Volney, J. Spence, J.R.



CENTRE FOR ENHANCED FOREST MANAGEMENT ADVANCES IN FORESTRY RESEARCH DEPARTMENT OF RENEWABLE RESOURCES EFM RESEARCH NOTE 03-2010 25000 20000 -1 15000 0 15 20 25 5 30 35 st decid uous B A (m 2) 40 ) ha r 10 Post-h arve e- 5 ve st de cid uo us BA (m 50 45 40 35 30 25 20 15 10 5000 2 10000 Pr LIEFFERS V.J., GRADOWSKI, T., LANDHÄUSSER, S.M., SIDDERS, D., VOLNEY, J., AND J.R.
SPENCE Variable retention, i.e., leaving residual trees in cutover areas, has become standard practice as a way to maintain forest biodiversity after logging.
There has been less research, however, on understanding how variable retention influences forest regeneration in particular hardwood regeneration. The EMEND experiment is a replicated experiment where boreal mixedwoods of different composition (Deciduous, Mixedwood and Coniferous) were cut leaving different levels of residual trees (0, 10, 20, 50, 75 and 100% residuals). Models for the prediction of hardwood regeneration based on pre and post harvest hardwood and softwood BA were developed. Sucker density (ha ) Regeneration of hardwoods in variable retention harvest systems – the EMEND experience Hardwood sucker density in relation to the amount of mature hardwoods in the stand before and after logging. Implications: The hardwood regeneration density and subsequent growth performance can be predicted by knowing the amount of hardwood basal area prior to logging and by varying levels of retention of basal area of hardwoods and softwoods after harvest; thus hardwood regeneration can be manipulated to fit the needs of mixedwood forest management. The EMEND experiment covers nearly 1000 Ha and ~100 cutting units of about 10 Ha. Methods: Nine year after harvest, the regeneration of aspen and balsam poplar was evaluated at the stand level for the three stand composition and six residual density treatment combinations. Results: While stands with higher hardwood basal area (BA) prior to logging produced more hardw...

Related documents