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首页> 外文期刊>Forests >Soil Available Phosphorus Loss Caused by Periodical Understory Management Reduce Understory Plant Diversity in a Northern Subtropical Pinus massoniana Plantation Chronosequence
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Soil Available Phosphorus Loss Caused by Periodical Understory Management Reduce Understory Plant Diversity in a Northern Subtropical Pinus massoniana Plantation Chronosequence

机译：定期林分损失土壤可用磷损失减少北部亚热带泥质泥浆Massoniana种植植物的林植物多样性

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Clearing of understory plants is a common management method in plantation forests, but its long-term impact on soil properties and understory plant diversity is still poorly understood. In order to uncover the potential relationship between understory diversity and soil properties, we categorized understory plants into herbs and shrubs, and took soil depth into consideration. We measured the soil variables and investigated the understory plant diversity in four stand age-classes (9-year-old for young, 18-year-old for intermediate, 28-year-old for near-mature, and 48-year-old for mature) in a Pinus massoniana plantation. We aimed to examine how the diversity of herbs and shrubs changed with stand succession and to determine which of the three soil depths (0–10 cm, 10–20 cm, 20–40 cm) had the strongest explanation for the understory plant diversity. Furthermore, structural equation modeling (SEM) was performed to assess the direct and indirect effect of understory clearing and stand age on understory diversity. We found that understory clearing influenced the trend of diversity of herbs and shrubs with stand age, and understory diversity showed a strong correlation with soil physical properties in all three soil layers. The soil properties in the 10–20 cm soil layer related with the diversity of herbs and shrubs most, while the 20–40 cm soil layer properties related with them the least. Understory clearing reduced soil available phosphorus (AP). Understory clearing and stand age were found to benefit understory plant diversity directly and decreased the understory diversity indirectly via AP. Consequently, to improve our understanding of the impact of understory clearing and stand age on biodiversity, we should take into account its direct and indirect effects.
机译：清除林部植物是种植园林中的常见管理方法，但其对土壤性质和林植物多样性的长期影响仍然很差。为了揭示林分离较多和土壤性质之间的潜在关系，我们将林植物分类为草药和灌木，并考虑了土壤深度。我们测量了土壤变量，并调查了四个立场年龄课程的林下植物多样性（为年轻，18岁的中级，28岁，近年28岁，48岁成熟）在Pinus massoniana种植园。我们旨在探讨草药和灌木的多样性如何随着支架连续而改变，并确定三种土壤深度（0-10厘米，10-20厘米，20-40cm）对林植物多样性的最强烈解释。此外，进行结构方程建模（SEM），以评估林下清算和站立时代的直接和间接影响。我们发现，林下清除影响了草药和灌木的趋势，具有待命年龄，衡床多样性与所有三层土层中的土壤物理性质有着强烈的相关性。 10-20厘米土层中的土壤性质与草药和灌木的多样性相关，而20-40厘米的土壤层性能最少。床骨较低的土壤可用磷（AP）。被发现将较低的清算和实体年龄直接受益较低的植物多样性，并通过AP间接地减少林分多样性。因此，为了改善我们对林下清算和阶段对生物多样性的影响的理解，我们应该考虑其直接和间接的影响。

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