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首页> 外文期刊>Canadian Journal of Forest Research >Mixed clones of short-rotation poplar coppice: Influence on productivityand homogeneity of harvested products
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Mixed clones of short-rotation poplar coppice: Influence on productivityand homogeneity of harvested products

机译：杨树短旋毛小混交混交林：对收获产品生产力和同质性的影响

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摘要

Two stands of short-rotation coppice of hybrid poplar were studied from age 3 to harvest (age 7 or 9). The performance of three clones planted at a density of 3000 stems/ha either in mixed- or mono-clonal stands was determined in each stand. Mean diameter and total biomass were not significantly different among the treatments (mixed- or mono-clonal stands). On the other hand, in mixed-clonal plots, biomass distribution was not equally distributed among clones. Diameter distribution was bimodal (two clones) or even trimodal (three clones). At one site (Tourtenay), mortality due to competition affected mostly the suppressed clone ('Boelare'). Mortality is significantly higher for this clone at age 7. With such closed spacings, competition occurs soon and social position is rapidly irreversible.
机译：从3岁到收获期（7或9岁）研究了杂交杨的两个短轮伐木林。在每个林分中测定了在混合或单克隆林中以3000茎/公顷的密度种植的三个克隆的性能。各处理（混合或单株）的平均直径和总生物量无显着差异。另一方面，在混合克隆地块中，生物量分布在克隆之间不均等。直径分布为双峰（两个克隆），甚至三峰（三个克隆）。在一个地点（Tourtenay），竞争所致的死亡率主要影响了被抑制的克隆（“ Boelare”）。此克隆在7岁时的死亡率明显更高。在这种封闭的距离下，竞争很快就会发生，并且社会地位迅速不可逆转。

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