Simulation Study on the Effects of Litter Layer Thickness on Seedling Emergence of Toona Ciliata Var. Pubescens
Simulation Study on the Effects of Litter Layer Thickness on Seedling Emergence of Toona Ciliata Var. Pubescens
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发表时间：
2014
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通讯作者：
Guo Xiao-ya
中科院分区：
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作者：
Guo Xiao-ya
Effects of litter thickness and implantation position on seed germination and seedling survival of Toona ciliata var. pubescens were studied by simulation in laboratory in order to explore the effect of litter layer on natural regeneration. The results showed that the thicker the litter things was,the later seed germination time was when the seeds were in the litter on. A certain thickness of litter content in seedlings had significant role in promoting and seedling stem length was shorter. The thicker the litter layer was,the later and lower seedling emergence was when litter covered seeds. With the litter layer thickness increased,the germination rate declined. The seedling emergence rate reduced significantly when litter thickness was greater than or equal to 2 cm. The seedling root length was shorter. Litter layer thickness was weaker negatively related to the biomass. The seedling survival rate reduced significantly with increasing of litter layer thickness. The seedlings covering 5 cm litter died after 29 days. The seedling emergence had been restricted for litter to some extent. The nature mortality was higher because of delicate seedling. The seed emergence and seedling on Toona ciliata var. pubescens have improved by removed litter appropriately in future forest management process.
