Key message The 19-year monitoring study revealed continuously positive and dynamic responses of tree growth to logging residue loadings. However, the lack of changes in soil nutrients suggested that increased growth might result from enhanced nutrient cycling with no net accumulation in the soil. Context Understanding how logging residue loadings affect soil nutrients and forest growth is critical for designing management strategies for sustaining long-term productivity in forest ecosystems. Aims We aimed to examine the relationships among logging residue loadings, soil nutrients, and tree growth over a long-term field experiment in lodgepole pine ( Pinus contorta Doug. ex Loud.) forests. Methods We established a field experiment in 1996 to examine the responses of lodgepole pine growth and soil nutrients to four residue loading treatments in the central interior of British Columbia, Canada. The four treatments were removal of all residues on the forest floor (N, 0 mg ha −1 ), residues loading similar to whole-tree harvesting (W, 35–45 mg ha −1 ), residues loading similar to stem-only harvesting (S, 60–70 mg ha −1 ), and residues loading similar to that found in disease- or insect-killed forests (D, 100–120 mg ha −1 ). Results Logging residue loadings had significantly positive and dynamic effects on diameter and height growths. The logging residue loadings did not significantly change soil nutrients in mineral soil pools in the long run, and there was no difference in tree growth between the treatments S and W over the study period. Conclusion Logging residue loadings significantly improved tree growth. The lack of response of soil nutrients leads to the hypothesis that nutrient fluxes from logging residues might play a more important role in tree growth in lodgepole pine forests. Our results can have important implications for bio-energy production and designing of nature-based practices for sustainable forest productivity.

中文翻译：

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长期伐木残留负荷会影响松树的树木生长，但不会影响红松的土壤养分。前大声。森林

关键信息 19 年的监测研究揭示了树木生长对伐木残留负荷的持续积极和动态响应。然而，土壤养分没有变化表明生长增加可能是由于土壤中没有净积累的养分循环增强。背景 了解伐木残留负荷如何影响土壤养分和森林生长对于设计维持森林生态系统长期生产力的管理策略至关重要。目的 我们旨在通过长期田间试验在黑松 (Pinus contorta Doug. ex Loud.) 森林中检查伐木残留负荷、土壤养分和树木生长之间的关系。方法 我们于 1996 年建立了一项田间试验，以检查加拿大不列颠哥伦比亚省中部内陆地区黑松生长和土壤养分对四种残留负荷处理的响应。四种处理是去除森林地面上的所有残留物（N，0 mg ha -1 ），残留负​​荷类似于整棵树收获（W，35-45 mg ha -1 ），残留负​​荷类似于仅茎收获(S, 60–70 mg ha -1 )，以及与在病害或虫害致死的森林中发现的相似的残留负载量 (D, 100–120 mg ha -1 )。结果 测井残留负荷对直径和高度的增长有显着的积极和动态影响。从长远来看，伐木残留负荷并未显着改变矿质土壤池中的土壤养分，在研究期间，处理 S 和 W 之间的树木生长没有差异。结论 记录残留负荷显着改善了树木的生长。土壤养分反应的缺乏导致了这样一种假设，即伐木残留物的养分通量可能在黑松林的树木生长中发挥更重要的作用。我们的研究结果对生物能源生产和可持续森林生产力的基于自然的实践的设计具有重要意义。