The growth of Larix gmelinii seedlings as affected by charcoal produced at two different temperatures
The growth of Larix gmelinii seedlings as affected by charcoal produced at two different temperatures
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DOI：
10.1007/s00374-010-0518-0
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发表时间：
2011-05
影响因子：
6.5
通讯作者：
K. Makoto;D. Choi;Y. Hashidoko;T. Koike
中科院分区：
文献类型：
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作者：
K. Makoto;D. Choi;Y. Hashidoko;T. Koike
火灾对森林的燃烧强度具有空间异质性，在不同温度下产生的木炭具有不同的物理和化学特征。木炭的这些可变特性可能反过来影响树苗的发芽和生长。为研究不同炭质对落叶松幼苗生长的影响，采用400°C（低炭）和800°C（高炭）条件下的落叶松枝源炭进行了实验研究；木炭与沙子以三种不同的比例（5%、20%和50%，沙子中的木炭比）混合。高炭用量对其各项性能均无显著影响，低炭用量对其生长有促进作用，且效果随添加量的增加而增强。与高炭施用相比，低炭施用的速效磷含量更高，针叶氮磷比更低，幼苗生长更快。施用高炭对落叶松幼苗的生长没有影响，这可能是由于高炭的高ph值抑制了幼苗的生长。这些结果表明，森林火灾中不同温度产生的木炭对落叶松幼苗生长的影响是不同的。
Fires burn forest with spatially heterogeneous intensity and charcoals generated at various temperatures during fires exhibit variable physical and chemical characteristics. These variable properties of charcoal may, in turn, influence germination and growth of tree seedlings. To examine the effects of different charcoal properties on the growth of Gmelin larch (Larix gmelinii) seedlings, we conducted an experiment with larch-branch-derived charcoals produced at 400°C (low charcoal) and 800°C (high charcoal); charcoal was combined with sand at three different rates (5%, 20% and 50%,v/vcharcoal in sand). The high charcoal had no significant effects on any measured property while the low charcoal application stimulated growth and the effect increased with the addition rate. The low charcoal application resulted in the greater available P content, a lower N/P in needles and the greater growth of seedlings than high charcoal application. The growth of seedlings was not affected by the application of the high charcoal at any rate probably because the high charcoal inhibited the seedling growth due to its high pH. These results indicate that charcoal produced at different temperatures during forest fires can affect the growth of Gmelin larch seedlings differently.