Do harvest methods and soil type impact the regeneration and growth of black spruce stands in northwestern Quebec?
Do harvest methods and soil type impact the regeneration and growth of black spruce stands in northwestern Quebec?
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DOI：
10.1139/x10-128
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发表时间：
2010-09-01
影响因子：
2.2
通讯作者：
Bergeron, Yves
中科院分区：
文献类型：
--
作者：
Lafleur, Benoit;Pare, David;Bergeron, Yves
在森林采伐期间采取了机械交通限制措施，以尽量减少对土壤的破坏和保护树木的再生。然而，这种做法是质疑沼泽化黑云杉（云杉马里亚纳（米尔。）BSP）的立场，严重的土壤干扰野火恢复森林生产力。本研究的目的是确定，8年后收获，如何通过皆伐和仔细记录造成的土壤扰动影响黑云杉自然更新和生长，以及这种影响如何变化的土壤类型。虽然更新密度较高，经过仔细的采伐，放养不受收获方法。再生看台较高，皆伐后，尽管潜在的更大的损害预先建立的再生。与谨慎采伐相比，皆伐也导致泥炭藓覆盖减少。和杜鹃花灌木。云杉干密度和库存都较高的有机质和亚湿润性土壤和较低的中质土壤。收获方法和土壤类型之间没有显着的相互作用，表明观察较高的黑云杉林和充足的放养与皆伐可能适用于本研究中考虑的所有土壤类型。这些结果表明，适当水平的土壤扰动是森林再生的重要组成部分，特别是在生态系统中，发生自生生产力下降。
Machinery traffic restrictions during forest harvest have been adopted to minimize soil damage and protect tree regeneration. However, this practice is questioned for paludifying black spruce (Picea mariana (Mill.) BSP) stands in which severe soil disturbance by wildfire restores forest productivity. The objective of this study was to determine, 8 years after harvest, how soil disturbance created by clearcutting and careful logging affected black spruce natural regeneration and growth and how this effect varied by soil type. While regeneration density was higher following careful logging, stocking was not influenced by harvest method. Regenerating stands were taller following clearcutting despite potentially greater damages to preestablished regeneration. Compared with careful logging, clearcutting also resulted in reduced cover of Sphagnum spp. and ericaceous shrubs. Spruce stem density and stocking were both higher on organic and subhydric soils and lower on mesic soils. No significant interactions were observed between harvest method and soil type, indicating that the observation of taller black spruce stands and adequate stocking with clearcutting may be applicable to all soil types considered in this study. These results suggest that an adequate level of soil disturbance is an important part of forest regeneration, particularly in ecosystems where an autogenic reduction in productivity occurs.