干旱区生态环境知识资源中心(Arid): Effects of ultraviolet (UV) radiation and litter layer thickness on litter decomposition of two tree species in a semi-arid site of Northeast China

Arid

	Effects of ultraviolet (UV) radiation and litter layer thickness on litter decomposition of two tree species in a semi-arid site of Northeast China
	Mao Bing; Zhao Lei; Zhao Qiong; Zeng Dehui
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:3 页码:416-428
英文摘要	Forests and grasslands in arid and semi-arid regions receive high-intensity ultraviolet (UV) radiation year-round. However, how the UV radiation affects the litter decomposition on the forest floor remains unclear. Here, we conducted a field-based experiment in 2011 in the southeastern Horqin Sandy Land, Northeast China, to investigate the effects of UV radiation, litter layer thickness, and their interaction on the mass loss and chemical properties of decomposing litter from Xiaozhuan poplar (Populus * xiaozhuanica) and Mongolian pine (Pinus sylvestris var. mongolica) plantation trees. We found that UV radiation accelerated the decomposition rates of both the Xiaozhuan poplar litter and Mongolian pine litter. For both species, the thick-layered litter had a lower mass loss than the thin-layered litter. The interaction between UV radiation and litter layer thickness significantly affected the litter mass loss of both tree species. However, the effects of UV radiation on the chemical properties of decomposing litter differed between the two species, which may be attributed to the contrasting initial leaf litter chemical properties and morphology. UV radiation mostly had positive effects on the lignin concentration and lignin/N ratio of Xiaozhuan poplar litter, while it had negative effects on the N concentration of Mongolian pine litter. Moreover, litter layer thickness and its interaction with UV radiation showed mostly positive effects on the N concentration and lignin/N ratio of Xiaozhuan poplar litter and the ratios of C/N and lignin/N of Mongolian pine litter, and mostly negative effects on the C/N ratio of Xiaozhuan poplar litter and the N concentration of Mongolian pine litter. Together, these results reveal the important roles played by UV radiation and litter layer thickness in the process of litter decomposition in this semi-arid region, and highlight how changes in the litter layer thickness can exert strong influences on the photodegradation of litter in tree plantations.
英文关键词	lignin litter decomposition litter layer thickness nitrogen forest plantation photodegradation UV radiation
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6230980
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335951
作者单位	Mao Bing, Institute of Applied Ecology, Chinese Academy of Sciences, CAS Key Laboratory of Forest Ecology and Management, Shenyang, Liaoning 110016, China.; Zhao Lei, Institute of Applied Ecology, Chinese Academy of Sciences;;College of Horticulture, Jilin Agricultural University, CAS Key Laboratory of Forest Ecology and Management;;, Shenyang;;Changchun, ;; 110016;;130118.; Zhao Qiong, Institute of Applied Ecology, Chinese Academy of Sciences;;Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, CAS Key Laboratory of Forest Ecology and Management;;, Shenyang;;Shenyang, ;; 110016;;110016.; Zeng Dehui, Institute of Applied Ecology, Chinese Academy of Sciences;;Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, CAS Key Laboratory of Forest Ecology and Management;;, Shenyang;;Shenyang, ;; 110016;;110016.
推荐引用方式 GB/T 7714	Mao Bing,Zhao Lei,Zhao Qiong,et al. Effects of ultraviolet (UV) radiation and litter layer thickness on litter decomposition of two tree species in a semi-arid site of Northeast China[J],2018,10(3):416-428.
APA	Mao Bing,Zhao Lei,Zhao Qiong,&Zeng Dehui.(2018).Effects of ultraviolet (UV) radiation and litter layer thickness on litter decomposition of two tree species in a semi-arid site of Northeast China.Journal of Arid Land,10(3),416-428.
MLA	Mao Bing,et al."Effects of ultraviolet (UV) radiation and litter layer thickness on litter decomposition of two tree species in a semi-arid site of Northeast China".Journal of Arid Land 10.3(2018):416-428.