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首页> 外文期刊>Scandinavian Journal of Forest Research >Effects of shelterwood method and plant stock type on the early growth and survival of pine seedlings in regeneration stands under hemiboreal conditions
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Effects of shelterwood method and plant stock type on the early growth and survival of pine seedlings in regeneration stands under hemiboreal conditions

机译：血管条件下避难所方法和植物股型对松树幼苗早期生长和存活的影响

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摘要

Shelterwood forest regeneration methods are increasingly used in northern Europe to reduce clear-cut based even-aged forest management. However, empirical knowledge about seedling performance under various shelterwood methods is still incomplete. We analysed the effects of three shelterwood methods (uniform (UNI), strip felling (STR) and group selection (GRO)) on four types of Scots pine plant stock type height growth and survival during the first 6 years in hemiboreal Estonia. After 6 years, the height of the planted seedlings was 35% lower in GRO and 47% lower in UNI compared to STR. A similar outcome was observed for the height growth of the sown seedlings. Competition with the nearest shelter trees had a negative effect on seedling height growth. Lower height growth in UNI can be attributed to more intensive root competition with shelter trees. Artificial sowing and natural seeding can provide sufficient regeneration, but height growth was significantly lower compared to that of planted seedlings. Shelterwood methods delay seedling growth compared to clear-cut area reforestation. The lag in regeneration height growth was the smallest in STR and the greatest in UNI. The growth lag can be reduced by using complementary planting to natural regeneration.
机译：避难所森林再生方法越来越多地用于北欧，减少基于清晰的甚至老化的森林管理。然而，关于各种避难所方法下的幼苗性能的实证知识仍然不完整。我们分析了三种遮蔽方法（统一（UNI），夹带（剥离（STR）和群体选择（GRO））的效果在血脂爱沙尼亚的前6年中的四种类型的苏格兰松树植物库存型高度生长和生存期。 6年后，与str相比，Gro的植物幼苗的高度较低，Uni中的47％降低。观察到播种苗的高度生长的类似结果。与最近的住所树木的竞争对幼苗高度的增长产生了负面影响。 UNI的较低高度增长可以归因于更加密集的根竞争与庇护所。人工播种和自然播种可以提供足够的再生，但与种植的幼苗相比，高度生长显着降低。与透明区域重新造林相比，避难木材延迟幼苗生长。再生高度生长的滞后是STR和UNI最大的滞后。通过使用互补种植到天然再生，可以减少生长滞后。

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