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首页> 外文会议>International Peat Congress; 20040606-11; Tampere(FI) >MANAGEMENT OF NATURALLY REGENERATED BIRCH ON CUT-AWAY PEATLANDS: PULP, VENEER OR ENERGY WOOD?
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MANAGEMENT OF NATURALLY REGENERATED BIRCH ON CUT-AWAY PEATLANDS: PULP, VENEER OR ENERGY WOOD?

机译：在开阔的草原上管理天然再生桦木：纸浆，单板还是能源木材？

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摘要

We compared the biomass production of three management alternatives for naturally regenerated mixed birch and willow thickets on a cut-away peatland at Aitoneva, Kihnioe over a period of 37 years. Naturally regenerated dense birch stands were a) thinned, b) clear-cut and left to coppice or c) left to grow as dense stands at the age of 16 years. Development of the stands was monitored for a period of further 21 years. The above-ground leafless dry-mass of the 37-years-old fertilized thinned stands (160-164 Mg ha~(-1)) was slightly higher than the above-ground biomass of two (16+21 years-old) energy wood rotations (145-155 Mg ha~(-1) ). The highest biomass yield was achieved with a rotation of 37 years in an un-thinned stand (211 Mg ha~(-1)). This study shows that the length of the rotation for birch in energy wood production should be considerably longer than 21 years. Furthermore, thinning of dense birch stands is an attractive option even when considering biomass production.
机译：在37年的时间里，我们比较了在基尼奥伊（Kihnioe）艾通涅娃（Aitoneva）的一块割去的泥炭地上，三种自然替代的桦木和柳树灌丛的管理方法的生物量生产。自然再生的茂密桦木林分a）变薄，b）清晰并留给矮灌木丛，或c）在16岁时以茂密林分生长。对展位的发展进行了为期21年的监控。 37岁的受精稀疏林分（160-164 Mg ha〜（-1））的地上无叶干质量略高于两种（16 + 21岁）能量的地上生物量木材旋转（145-155 Mg ha〜（-1））。在未稀释的林分中（211 Mg ha〜（-1））旋转37年可获得最高的生物量产量。这项研究表明，能源木材生产中桦木的旋转长度应大大超过21年。此外，即使考虑生物量生产，致密的桦木林分稀疏也是一个有吸引力的选择。

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