Clear-cut forest harvest impacts on soil quality indicators in the mixedwood forest of Saskatchewan, Canada
Clear-cut forest harvest impacts on soil quality indicators in the mixedwood forest of Saskatchewan, Canada
复制标题
加拿大萨斯喀彻温省混交林中森林采伐对土壤质量指标的影响
DOI：
10.1016/s0016-7061(96)00075-4
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
C. Kessel
中科院分区：
文献类型：
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作者：
D. Pennock;C. Kessel
土壤质量的概念与一系列人为对土壤造成的干扰有关；我们的目标是研究皆伐对加拿大萨斯喀彻温省中部六个混合林（欧洲山杨 - 云杉）土壤质量状况的影响。将两个短期（1 至 5 年）和四个中期（6 至 20 年）皆伐地点的土壤质量状况与八个成熟的混合木地点进行了比较。所有地点都有相似但复杂的土壤和母沉积物分布。短期砍伐场地和成熟混合木场地之间没有观察到重大差异。在中期站点，观察到土壤有机碳（24％）、土壤氮（27％）和LFH厚度（28％）的大量损失，同时土壤表面（0至15厘米层）交换性钙和镁（30％）、可溶性有机磷（15％）以及阳离子交换能力和碱饱和度（20％）的减少。 15 至 45 厘米土层的损失要低得多。总体而言，在砍伐场地观察到的这些土壤成分的水平处于成熟混合木场地评估的自然或未受干扰的范围内；然而，砍伐场地的土壤有机碳和氮含量低于自然范围。尽管土壤有机碳和氮损失的绝对水平远低于典型农业景观，但这些森林景观损失的长期生态意义仍然令人担忧。
The concept of soil quality is relevant to a range of human-induced disturbances on soil; our objective was to examine the impact of clear-cutting on soil quality conditions in six Mixedwood (Populus tremuloides-Picea glauca) stands in Central Saskatchewan, Canada. Soil quality conditions at two short-term (1 to 5 years) and four medium-term (6 to 20 years) clear-cut sites were compared to eight mature Mixedwood sites. All sites had a similar, albeit complex, distribution of soil and parent sediments. No major differences were observed between the short-term clear-cut sites and the mature Mixedwood sites. At the medium-term sites, substantial losses of soil organic carbon (24%), soil nitrogen (27%), and LFH thickness (28%) were observed, along with decreases in the soil surface (0 to 15 cm layer) of exchangeable calcium and magnesium (30%), soluble organic P (15%), and cation exchange capacity and base saturation (20%). The losses were much lower in the 15 to 45 cm layer of the soil. Overall, the levels of these soil components observed at the clear-cut sites were within the natural or undisturbed range as assessed at the mature Mixedwood sites; however the amounts of soil organic carbon and nitrogen at the clear-cut sites were lower than the natural range. Although the absolute levels of loss of soil organic carbon and nitrogen were much lower than in typical agricultural landscapes, the long-term ecological significance of the losses in these forested landscapes remains a concern.