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Preliminary Results from a Structural Conversion Thinning Trial in Eastern Canada
Journal of Forestry ( IF 2.3 ) Pub Date : 2020-06-23 , DOI: 10.1093/jofore/fvaa022
Laurie Dupont-Leduc 1 , Robert Schneider 1 , Luc Sirois 1
Affiliation  

In 2008, a thinning trial consisting in the removal of competitors around high growth potential stems (crop trees, CTs) was initiated as the first step of a structural conversion to transform even-aged stands into uneven-aged stands. Two intensities of thinning by CT release and thinning from below were tested in white spruce (Picea glauca [Moench] Voss) plantations and in balsam fir (Abies balsamea [L.] Mill)—dominated naturally regenerated stands. Unlike thinning from below, which aims to remove poor quality stems to improve the growth of residual trees, thinning by CT release aims to reduce competition between dominant trees. Trees thinned by CT release showed a significantly higher diameter at breast height increment than those in the control plots. CT release did not significantly increase stand structure, nor did it reduce stand growth, which helps to address the concerns of regional forest stakeholders. CT release may offer other benefits in the long term, but subsequent interventions are necessary to evaluate if this treatment meets the desired objectives.

中文翻译:

加拿大东部的结构转换稀疏试验的初步结果

2008年,进行了一项疏伐试验,该试验包括清除具有高生长潜力的茎(农作物树,CT)周围的竞争者,这是结构转变的第一步,即将年龄均匀的林分转变为年龄均匀的林分。在白云杉(Picea glauca [Moench] Voss)人工林和苦瓜冷杉(Abies balsamea)中,测试了通过CT释放和从下方稀疏得到的两种强度。[L.] Mill)—以自然再生林为主。与从下方疏伐旨在去除劣质茎以改善残留树木的生长不同,通过CT释放稀疏旨在减少优势树木之间的竞争。通过CT释放而变薄的树木在胸部高度增加时显示出比对照图中的树木明显更大的直径。CT释放并没有显着增加林分结构,也没有降低林分生长,这有助于解决区域森林利益相关者的担忧。从长远来看,CT释放可能会带来其他好处,但是必须进行后续干预,以评估这种治疗是否达到期望的目标。
更新日期:2020-09-01
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