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Modelling the effects of forest management intensification on base cation concentrations in soil water and on tree growth in spruce forests in Sweden
European Journal of Forest Research ( IF 2.8 ) Pub Date : 2021-08-19 , DOI: 10.1007/s10342-021-01408-6
Giuliana Zanchi 1 , Klas Lucander 1 , Veronika Kronnäs 1 , Cecilia Akselsson 1 , Martin Erlandsson Lampa 2
Affiliation  

The study investigated the effects of forest residue extraction on tree growth and base cations concentrations in soil water under different climatic conditions in Sweden. For this purpose, the dynamic model ForSAFE was used to compare the effects of whole-tree harvesting and stem harvesting on tree biomass and the soil solution over time at 6 different forest sites. The study confirmed the results from experimental sites showing a temporary reduction of base cation concentration in the soil solution for a period of 20–30 years after whole-tree harvesting. The model showed that this was mainly caused by the reduced inputs of organic material after residue extraction and thereby reduced nutrient mineralisation in the soil. The model results also showed that whole-tree harvesting can affect tree growth at nitrogen-poor forest sites, such as the ones in northern Sweden, due to the decrease of nitrogen availability after residue removal. Possible ways of reducing this impact could be to compensate the losses with fertilisation or extract residue without foliage in areas of Sweden with low nitrogen deposition. The study highlighted the need to better understand the medium- and long-term effects of whole-tree harvesting on tree growth, since the results suggested that reduced tree growth after whole-tree harvesting could be only temporary. However, these results do not account for prolonged extraction of forest residues that could progressively deplete nutrient pools and lead to permanent effects on tree growth.



中文翻译:

模拟森林管理集约化对土壤水中碱性阳离子浓度和瑞典云杉林树木生长的影响

该研究调查了瑞典不同气候条件下森林残留物提取对树木生长和土壤水中碱性阳离子浓度的影响。为此,使用动态模型 ForSAFE 来比较整棵树采伐和茎采伐对 6 个不同森林地点随时间推移对树木生物量和土壤溶液的影响。该研究证实了实验地点的结果,表明在整棵树收获后的 20-30 年期间,土壤溶液中的碱性阳离子浓度暂时降低。该模型表明,这主要是由于残留物提取后有机材料的投入减少,从而减少了土壤中的养分矿化。模型结果还表明,整棵树采伐会影响缺氮林地的树木生长,例如瑞典北部的那些,因为在去除残留物后氮的可用性降低。减少这种影响的可能方法是在瑞典低氮沉积的地区通过施肥或提取没有叶子的残留物来补偿损失。该研究强调需要更好地了解整棵树收获对树木生长的中长期影响,因为结果表明整棵树收获后树木生长的减少可能只是暂时的。然而,这些结果并没有说明长期提取森林残留物可能会逐渐耗尽养分库并导致对树木生长的永久性影响。减少这种影响的可能方法是在瑞典低氮沉积的地区通过施肥或提取没有叶子的残留物来补偿损失。该研究强调需要更好地了解整棵树收获对树木生长的中长期影响,因为结果表明整棵树收获后树木生长的减少可能只是暂时的。然而,这些结果并没有说明长期提取森林残留物可能会逐渐耗尽养分库并导致对树木生长的永久性影响。减少这种影响的可能方法是在瑞典低氮沉积的地区通过施肥或提取没有叶子的残留物来补偿损失。该研究强调需要更好地了解整棵树收获对树木生长的中长期影响,因为结果表明整棵树收获后树木生长的减少可能只是暂时的。然而,这些结果并没有说明长期提取森林残留物可能会逐渐耗尽养分库并导致对树木生长的永久性影响。因为结果表明整棵树收获后树木生长的减少可能只是暂时的。然而,这些结果并没有说明长期提取森林残留物可能会逐渐耗尽养分库并导致对树木生长的永久性影响。因为结果表明整棵树收获后树木生长的减少可能只是暂时的。然而,这些结果并没有说明长期提取森林残留物可能会逐渐耗尽养分库并导致对树木生长的永久性影响。

更新日期:2021-08-19
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