Regeneration responses influenced by single-tree selection harvesting in a mixed-species tree community in northern Japan
Regeneration responses influenced by single-tree selection harvesting in a mixed-species tree community in northern Japan
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DOI：
10.1139/x07-103
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发表时间：
2007-09-01
影响因子：
2.2
通讯作者：
Yoshida, Toshiya
中科院分区：
文献类型：
--
作者：
Noguchi, Mahoko;Yoshida, Toshiya
本研究的目的是评估细尺度冠层干扰选择收获及其相关的做法（人工种植和机械集材）在日本北方混交林树种的成功再生的影响。我们在一个6.7公顷的永久性研究林分中设置了163个地块，自1974年以来，这些树木大约每隔10年就被部分采伐一次。除了典型的不耐荫树种岳桦（BetulaermaniiCham.）外，树木更新（4324株中心点ha（-1））在封闭林冠下比在林窗下发生得更频繁。特别是，小的冠层开口，往往很快关闭显示较高的林下树木更新密度可能是由于抑制竞争，从矮竹。在种植和收获过程中发生的表层土壤扰动，甚至进一步增强林下更新。这里所示的结果应仔细概括，因为我们只调查了一个sting. However，我们的研究结果清楚地表明，创建小冠层间隙与包含土壤干扰的场地准备，应检查在管理实践中，以保持在这种类型的混交林的群落结构。
The objective of this study was to assess the effects of fine-scale canopy disturbances induced by selection harvesting and its associated practices (artificial planting and machinery skidding) on the successful regeneration of tree species in a northern Japanese mixed forest. We set up 163 plots in a 6.7 ha permanent study stand where trees have been partially harvested at approximately 10-year intervals since 1974. The regeneration of trees (4324 stems center dot ha(-1)) occurred more frequently under closed canopies than under canopy gaps, except for a typical shade-intolerant species, Betula ermanii Cham. In particular, small canopy openings that tend to close quickly displayed higher understory tree regeneration densities likely due to the suppression of competition from dwarf bamboos. The surface soil disturbances that occurred during planting and harvesting even further enhanced understory regeneration. The results shown here should be generalized carefully because we have investigated only one stand. Nevertheless, our findings clearly indicated that the creation of small canopy gaps associated with site preparation that contains soil disturbances should be examined in management practices to maintain the community structure in this type of mixed forest.