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首页> 外文期刊>Environmental Management >Clonal Re-Introduction of Endangered Plant Species: The Case of German False Tamarisk in Pre-Alpine Rivers
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Clonal Re-Introduction of Endangered Plant Species: The Case of German False Tamarisk in Pre-Alpine Rivers

机译：濒危植物物种的克隆再引入：前高山河流中的德国假Ta柳

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摘要

The scope of re-introduction as a measure for plant species protection is increasing, but as long as no standardized methods are available, species-specific assessments are necessary to determine whether seeds, adult plants or plant fragments should be used. The endangered German False Tamarisk (Myricaria germa-nica), which occurs on gravel bars along pre-alpine rivers, is difficult to grow from seeds. Thus, propagation of stem cuttings was investigated as an alternative method. Experiments were conducted in a greenhouse and a field site with three treatments: cutting length 5 or 10 cm, vertical burial 5 or 10 cm, and water level low or high. Plants grown in the greenhouse were transplanted to the River Isar to test establishment of rooted cuttings on gravel bars. The cuttings in the greenhouse showed high survival (34-96 %). Survival and biomass production were greatest for 10-cm cuttings buried at 10-cm depth, while only one of the 5-cm cuttings survived at this depth, and no significant effect of variation in water level was observed. None of the cuttings transplanted to field sites survived, most likely because of drought stress and competition. We conclude that for re-introduction of Myricaria germanica rooted cuttings can be easily produced in large quantities, while transplantation to near-natural environments has to be improved to reduce mortality.
机译：作为保护植物物种的一种手段，重新引进的范围正在扩大，但是，只要没有标准化的方法，就必须进行针对物种的评估，以确定是否应使用种子，成年植物或植物碎片。濒临灭绝的德国假Ta柳（Myricaria germa-nica）很难从种子中生长，该品种出现在高山前河沿岸的碎石上。因此，研究了茎investigated插繁殖作为一种替代方法。实验在温室和野外进行了三种处理：切割长度为5或10厘米，垂直埋葬为5或10厘米，水位低或高。将温室中生长的植物移植到伊萨尔河上，以测试在碎石棒上生根的cutting插的建立。温室中的插条显示出较高的存活率（34-96％）。埋藏在10厘米深度的10厘米切屑的存活率和生物量产量最高，而在5厘米的切屑中只有一个在此深度幸存，并且未观察到水位变化的显着影响。移植到野外的插条没有一个幸存下来，这很可能是由于干旱和竞争所致。我们得出结论，要重新引入德国杨梅，可以容易地大量生产带根的插条，同时必须改善向近自然环境的移植以降低死亡率。

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