Pre-commercial thinning, birch admixture and sprout management in planted Norway spruce stands in South Sweden

Holmström, E. and Hjelm, K. and Johansson, U. and Karlsson, M. and Valkonen, S. and Nilsson, U. (2015) Pre-commercial thinning, birch admixture and sprout management in planted Norway spruce stands in South Sweden. Scandinavian Journal of Forest Research. pp. 1-10. ISSN 0282-7581

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Official URL: http://dx.doi.org/10.1080/02827581.2015.1055792

Abstract

ABSTRACTEarly management of the regenerated seedlings shapes the future stand properties. To address these issues, pre-commercial thinning (PCT) and control treatments were applied to planted Norway spruce (Picea abies L. Karst) and naturally regenerated birch (Betula pendula Roth., Betula pubescens Ehrh.) stands in forest experiments in southern Sweden (lat. 56?57?N) containing 1.1?5.5?m tall saplings. The treatments were retention of 1000 or 2000?stems?ha?1 of Norway spruce, with no birch or birch at 1000?stems?ha?1. Treatments were replicated with and without annual removal of birch sprouts from stumps. The periodic annual increment (PAI) over five years was calculated for total stand volume and individual trees. The mean PAI of dominant trees was significantly higher both following all PCT treatments than controls, and following low rather than high-density PCT. Birch retention did not affect growth of the dominant trees but PAI was lower in plots with uncontrolled sprouting. The PAI of birch was significantly higher in low-density Norway spruce plots than in control plots and the high-density plots. The treatment response was significant even in stands with initial heights of only 1?2?m.

Item Type: Article
Language: English
Future Forest Subject: Skogsbruk för många olika nyttor > Metoder för skötsel
Depositing User: Christer Enkvist
Date Deposited: 28 Feb 2017 14:27
Last Modified: 28 Feb 2017 14:27
URI: https://ffpdb.slu.se/id/eprint/3940

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