Characteristics of fine root system and water uptake in a triploid Populus tomentosa plantation in the North China Plain: Implications for irrigation water management

doi:10.1016/j.agwat.2012.11.006

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	Characteristics of fine root system and water uptake in a triploid Populus tomentosa plantation in the North China Plain: Implications for irrigation water management
	Xi, Benye 1; Wang, Ye 1; Jia, Liming 1; Bloomberg, Mark 2; Li, Guangde 3; Di, Nan 1
	2013
发表期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
卷号	117 页码:83-92
摘要	The form and water uptake characteristics of the fine root system in a 5-year-old triploid Populus tomentosa plantation were investigated to make recommendations related to irrigation water management for P. tomentosa plantation. Fine roots for analysis were collected from 2106 soil cores taken around eight trees. Soil moisture, trunk sap flow and evaporation were measured concurrently for four months in two experimental plots using time-domain reflectometry, thermal dissipation sensors and micro-lysimeters, respectively. Nearly half (44%) of fine roots corresponded to 0.2-0.5. mm diameter. Generally, lateral root distribution was even, however, the vertical root profile showed an unusual pattern (nearly an 'S' shape). Dense fine roots occurred in surface soil and nearly one third (28%) of total fine roots occurred below 100. cm depth, indicating the plantation had developed a dimorphic root system. With increasing distance from the tree, root distribution tended to be shallower. Mean fine root diameter was significantly larger (P90. cm), implying deep roots can contribute significantly to the water relations of mature P. tomentosa plantations. This functional significance of deep roots might be determined by their high length density and relatively large diameter. Based on these results, three irrigation management strategies were recommended: (1) irrigation schedules should be devised based on periodic measurement of the depth to water table; (2) water should be mainly provided to and maintained in the surface 40. cm soil; and (3) water should be applied to the zone within 1. m from the tree. © 2012 Elsevier B.V.
关键词	Forestry Groundwater Plants (botany) Soil moisture Textures Water management Water supply Fine roots Irrigation water management Populus tomentosa Root-water uptake Water use
DOI	10.1016/j.agwat.2012.11.006
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
WOS记录号	WOS:000314431700010
出版者	Elsevier B.V., Netherlands
EI入藏号	20130215886582
EI主题词	Irrigation
原始文献类型	Journal article (JA)
EISSN	1873-2283
引用统计	被引频次：51[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.library.ouchn.edu.cn/handle/39V7QQFX/3880
专题	国家开放大学
作者单位	1.Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing, China; 2.School of Forestry, University of Canterbury, Christchurch, New Zealand; 3.Faculty of Agroforestry and Medicine, Open University of China, Beijing, China
推荐引用方式 GB/T 7714	Xi, Benye,Wang, Ye,Jia, Liming,et al. Characteristics of fine root system and water uptake in a triploid Populus tomentosa plantation in the North China Plain: Implications for irrigation water management[J]. AGRICULTURAL WATER MANAGEMENT,2013,117:83-92.
APA	Xi, Benye,Wang, Ye,Jia, Liming,Bloomberg, Mark,Li, Guangde,&Di, Nan.(2013).Characteristics of fine root system and water uptake in a triploid Populus tomentosa plantation in the North China Plain: Implications for irrigation water management.AGRICULTURAL WATER MANAGEMENT,117,83-92.
MLA	Xi, Benye,et al."Characteristics of fine root system and water uptake in a triploid Populus tomentosa plantation in the North China Plain: Implications for irrigation water management".AGRICULTURAL WATER MANAGEMENT 117(2013):83-92.