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Anna Radtke David Toe Frederic Berger Stefan Zerbe Franck Bourrier 《Annals of Forest Science》2014,71(4):485-494
? Context
One eighth of Europe’s forests are still managed as coppice. In some European countries, more than half of the forest exhibits coppice structures from the past or present coppice management. Many of these forests grow in the broadleaf zone of mountainous regions, often on steep slopes. Here, they play an important role in rockfall protection. However, it remains unclear how coppice forests should be structured for optimal rockfall protection or how the protection effect changes during the aging of the coppice.? Aim
A few studies have applied rock trajectory analyses, but so far, no process-based model has been used to quantify the protective effect of differently structured coppice forests. The present study compared 40 coppice patches from two chronosequences in South Tyrol, North Italy, regarding their protective effect against rocks of two sizes using the rockfall simulation model Rockyfor3D.? Results
The results indicate that coppice stands older than 30 years better protect against rockfall than medium-aged and young stands, although the old ones have lower stem densities. Surprisingly, a random stem distribution had a better protective effect than the clumped stem distribution typical for coppice stands.? Conclusion
Implications for future management are discussed in detail, including the relevance of standards in coppice forests. 相似文献2.
为筛选出一株具有微生物源植物调节剂功能的细菌,并探讨其潜在的生物功能,利用平板涂布法以及16S rRNA鉴定技术对菌株进行分离、鉴定;同时使用该菌株发酵液对番茄的种子和幼苗分别进行浸种和灌根处理,并进行农艺指标测定。结果表明:经鉴定该菌株为烟草肠杆菌,其发酵液对番茄种子的萌发、幼苗的生长具有显著的促进作用;发酵液浓度为1×104 cfu·mL-1时促生效果最好,与对照相比,根长、株高、干质量和鲜质量分别增加63.42%、46.17%、150.00%和144.83%。研究结果可为该菌株开发为微生物肥料或微生物源植物生长调节剂提供技术支持。 相似文献
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Soe Toe Toe Thwe Thida Lay Aye Pwint Thu Myint Kyi Thar Lwin Than Than Thaung Ye Win Min Aye Aye Mitsui Shota Terahara Takeshi Endo Masato Yokota Masashi Rahman M. Moshiur Kobayashi Takeshi 《Fisheries Science》2021,87(3):311-320
Fisheries Science - The Silond catfish Silonia silondia, locally known as Nga Myin Yinn, is a commercially important fish in Myanmar; however, fundamental knowledge of its population structure is... 相似文献
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