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首页> 外文会议>2011 International Conference on Management and Service Science >Long-Term Effect of Thinning and Creating Gaps on Tree Regeneration and Understory Vegetation in Larch Plantation
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Long-Term Effect of Thinning and Creating Gaps on Tree Regeneration and Understory Vegetation in Larch Plantation

机译：疏伐和创建空白对落叶松人工林树木更新和林下植被的长期影响

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The influences of different management operations on tree regeneration and understory vegetation were tested 20 years after thinning in larch plantations in the Loess Plateau of China. Five treatments were conducted: unthinned, uniform light, moderate, heavy thinning, and creation of gaps. Creating gaps noticeably enhanced tree regeneration and understory vegetation development. In contrast, the effect of light and moderate thinning on tree regeneration was slight. Shade-tolerant species dominated seedling communities in unthinned and lightly and moderately thinned stands, while the importance value of shade-intolerant species increased with the intensity of thinning. These results suggest that creating gaps in larch plantations can be an effective way of improving tree regeneration and increasing the diversity of shrubs and herbs in the long-term. However, the results also suggest that uniform light and moderate thinning are probably too slight to improve either of these outcomes. Thus, periodically variable density thinning should be considered for both biodiversity conservation and timber production in larch plantations.
机译：黄土高原落叶松人工林抚育20年后，研究了不同管理措施对树木更新和林下植被的影响。进行了五种处理：未稀疏，均匀，轻度，中度，重度稀疏和产生缝隙。缝隙明显地促进了树木的再生和林下植被的发展。相反，轻度和中度间伐对树木再生的影响很小。在不稀疏和轻度和中度稀疏的林分中，耐荫树种主导苗木群落，而耐荫树种的重要性随着稀疏程度的增加而增加。这些结果表明，从长远来看，在落叶松人工林中造成缝隙可能是改善树木再生并增加灌木和草药多样性的有效途径。但是，结果还表明，均匀的光照和适度的稀疏可能太轻微而无法改善这些结果。因此，对于落叶松人工林的生物多样性保护和木材生产，应考虑定期可变密度的间伐。

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