Morphology and longevity of different-order fine roots in poplar (Populus x euramericana) plantations with contrasting forest productivities

doi:10.1139/cjfr-2017-0296

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Morphology and longevity of different-order fine roots in poplar (Populus x euramericana) plantations with contrasting forest productivities
	Zhu, Wanrui 1,2; Sang, Ya Lin 2; Zhu, Qiliang 2; Duan, Baoli3 ; Wang, Yanping 2,4
刊名	CANADIAN JOURNAL OF FOREST RESEARCH
	2018-06-01
卷号	48 期号:6 页码:611-620
关键词	fine-root order poplar plantation root life-span root morphology soil conditions
ISSN号	0045-5067
DOI	10.1139/cjfr-2017-0296
英文摘要	Fine roots play important roles in the allocation of forest net primary productivity. Here, to provide insights into the intrinsic and extrinsic factors affecting the root growth, we examined the morphology and longevity of different-order fine roots in two poplar (Populus x euramericana (Dode) Guinier) plantations with contrasting forest productivities. The results indicated that the biomass of fine roots decreased significantly as the root orders increased (P < 0.05). In the plantation with relatively high productivity, the specific root length of the first-and second-order roots was significantly greater than that of the third-to fifth-order roots (P < 0.05). Observations of minirhizotrons showed that roots of the third-order and higher lived longer than the first-and second-order roots. Compared with those in the plantation with relatively low productivity, the cumulative survival rate of the first-order roots was significantly higher in the plantation with relatively high productivity, while that of the third-order or higher roots was lower. The life-span of the first-order roots correlated negatively with soil available inorganic nitrogen, while that of the second-order roots correlated positively with the soil phenolic acid content. A Cox proportional hazards analysis revealed that soil conditions, root orders, season of root birth, and soil depth significantly affected fine-root longevity. These findings suggest that roots of different orders contribute unequally to the poplar plantation productivity.
语种	英语
出版者	CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
WOS记录号	WOS:000433154400001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23022]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wang, Yanping
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China 2.Shandong Agr Univ, Taishan Forest Ecosyst Res Stn, State Forestry Adm, Coll Forestry, Tai An 271018, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China 4.Soil Eros & Ecol Restorat Lab Shandong Prov, Tai An 271018, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Wanrui,Sang, Ya Lin,Zhu, Qiliang,et al. Morphology and longevity of different-order fine roots in poplar (Populus x euramericana) plantations with contrasting forest productivities[J]. CANADIAN JOURNAL OF FOREST RESEARCH,2018,48(6):611-620.
APA	Zhu, Wanrui,Sang, Ya Lin,Zhu, Qiliang,Duan, Baoli,&Wang, Yanping.(2018).Morphology and longevity of different-order fine roots in poplar (Populus x euramericana) plantations with contrasting forest productivities.CANADIAN JOURNAL OF FOREST RESEARCH,48(6),611-620.
MLA	Zhu, Wanrui,et al."Morphology and longevity of different-order fine roots in poplar (Populus x euramericana) plantations with contrasting forest productivities".CANADIAN JOURNAL OF FOREST RESEARCH 48.6(2018):611-620.