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首页> 外文期刊>Annals of Forest Research >Aspects of European beech decline in Romania from 2001 to 2004
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Aspects of European beech decline in Romania from 2001 to 2004

机译：2001年至2004年罗马尼亚的欧洲山毛榉数量下降

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Climatic factors (severe drought of 1999-2000 especially in central and eastern regions) have released the recent European beech decline in Romania. This phenomenon has generally occurred in old (>100 years), (almost) pure, and high productive stands, situated especially on plain sites with excessive clayey soils or on slopes with shallow or sandy soils. Bark and wood fungi (Nectria coccinea, Schizophyllum commune, Coriolus hirsutus, Oudemansiella mucida, Fomes fomentarius, Phytophthora spp., Armillaria gallica) and insects (Cryptococcus fagisuga, Xyleborus saxeseni, Trypodendron domesticum, Cerambycidae, Hylecoetus dermestoides, Taphrorynchus bicolor, Xyleborus monographus, Agrilus viridis) have been associated with beech decline. Beech crown defoliation has suddenly occurred (till 2001), followed by a slowly but continuously decline in the next years, in all the experimental plots. In mixed hilly stands Silver-fir has suffered similar decline with beech, Norway spruce being relative resistant. On soils with clayey horizons, old or sometimes even young trees of sycamore and Norway maple (seldom common hornbeam) have had the same die-back phenomenon. Sessile and common oak were significantly more resistant than beech, therefore their role in the future stands should be increased. Forest site types have been analyzed and changed in Suceava Plateau. Keywords:beech decline, climate, soil, stand, fungi, insects.
机译：气候因素（1999-2000年的严重干旱，特别是中部和东部地区）释放了罗马尼亚最近出现的欧洲山毛榉数量下降的情况。这种现象通常发生在旧的（> 100年），（几乎）纯净，高产的林分中，尤其是在粘土质土壤过多的平原地区或浅层或沙质土壤的斜坡上。树皮和木材真菌（Nectria coccinea，Schizophyllum commune，Coriolus hirsutus，Oudemansiella mucida，Fomes fomentarius，Phytophthora spp。，Armillaria gallica）和昆虫（Cryptococcus fagisuga，Xyborborus saxesususus，Hyperboredusususususus，Cryptococcus fagisuga，Xyborus Agrilus viridis）与山毛榉下降有关。在所有实验区中，山毛榉树冠的脱叶突然发生（到2001年），然后在接下来的几年中缓慢但持续地下降。在混合的丘陵地带，白桦树遭受了类似的下降，山毛榉，挪威云杉相对抗性强。在黏土层上的土壤上，无花果和挪威枫树（很少有常见的角树）的老树，有时甚至是幼树也有同样的枯死现象。无柄橡木和普通橡木比山毛榉具有更大的抵抗力，因此应增加它们在未来林分中的作用。苏恰瓦高原地区的森林地类型已经过分析和更改。关键词：山毛榉下降，气候，土壤，林分，真菌，昆虫。

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