Response of Fine Roots to Soil Moisture of Different Gradients in Young Populus tomentosa Plantation

doi:10.11707/j.1001-7488.20191013

CSpace

	Response of Fine Roots to Soil Moisture of Different Gradients in Young Populus tomentosa Plantation
	Zou, Songyan 1; Li, Doudou 1; Wang, Jinsong 2; Di, Nan 3; Liu, Jinqiang 1; Wang, Ye 4; Li, Guangde 5; Duan, Jie 1; Jia, Liming 1; Xi, Benye 1
	2019-10-01
发表期刊	林业科学
ISSN	1001-7488
卷号	55 期号:10 页码:124-137
摘要	Objective Clarifying the short-term response of fine roots to soil water gradient in the P. tomentosa plantation, to have a better understanding of the ecological adaption strategy of its roots to soil moisture and provides theoretical basis for the optimization of its artificial forest moisture management strategy.Method Three irrigation treatments were set in a two-year-old P. tomentosa stand planted in sandy loam, i.e. full irrigation (FI), controlled irrigation (CI), and control (CK). After 2 months of irrigation, root sampling down to 150 cm depth was conducted in each treatment using the soil core method. Through the measurement of root samples, root growth, distribution and morphology data in each treatment, soil depth and horizontal distance were obtained.Result Vertically, in each soil layer, there is no significant difference in fine root biomass density (FRBD) among treatments(P> 0.05). In the whole root zone and the area with a large difference in moisture in shallow soil layer among treatments, the distribution depth of fine root showed a trend of CK > CI > FI. However, this trend was not obvious in the area with less difference in soil water content. Horizontally, FRBD in the CK decreased gradually with the increase of the distance from trees, but this trend was very weak in FI and CI treatments. There was no significant difference of FRBD among treatments at each horizontal distance (P> 0.05), except for the distance of 30 cm from tree, where FRBD of CK was significantly higher than that of FI and CI treatments (P 0.05). Both the variation of the total fine root biomass and length among the treatments followed an order of CK > FI > CI.Conclusion In conclusion, when a short-term moisture difference occurred in the shallow soil layers, 1) the fine roots of P. tomentosa distributed deeper and tended to concentrate closer to the tree with the aggravation of drought stress, 2) P. tomentosa preferentially adjusted the fine root distribution rather than the fine root morphology in the shallow soil layer to adapt to soil water stress, 3) as to the total amount of fine roots, P. tomentosa adopted a regulation strategy of slight decrease at first and subsequently distinct increase. High frequency irrigation should be applied to two-year-old P. tomentosa stand in dry season. © 2019, Editorial Department of Scientia Silvae Sinicae. All right reserved.
关键词	Biomass Clarification Drought Ecology Irrigation Morphology Soil moisture Controlled irrigations Fine roots Fine-root biomass High frequency irrigation Irrigation treatments Moisture management Populus tomentosa Soil water content
DOI	10.11707/j.1001-7488.20191013
收录类别	EI
语种	英语
出版者	Chinese Society of Forestry
EI入藏号	20200107972523
EI主题词	Forestry
原始文献类型	Journal article (JA)
文献类型	期刊论文
条目标识符	http://ir.library.ouchn.edu.cn/handle/39V7QQFX/3894
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; 100083, China; 2.Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; 3.College of Ecology and Environment Science, Inner Mongolia University, Hohhot; 010021, China; 4.Institute of Agriculture and Forestry Sciences, Beijing Academy of Forestry and Pomology, Beijing; 100093, China; 5.Faculty of Agriculture, Forestry and Medicine, The Open University of China, Beijing; 100039, China
推荐引用方式 GB/T 7714	Zou, Songyan,Li, Doudou,Wang, Jinsong,et al. Response of Fine Roots to Soil Moisture of Different Gradients in Young Populus tomentosa Plantation[J]. 林业科学,2019,55(10):124-137.
APA	Zou, Songyan.,Li, Doudou.,Wang, Jinsong.,Di, Nan.,Liu, Jinqiang.,...&Xi, Benye.(2019).Response of Fine Roots to Soil Moisture of Different Gradients in Young Populus tomentosa Plantation.林业科学,55(10),124-137.
MLA	Zou, Songyan,et al."Response of Fine Roots to Soil Moisture of Different Gradients in Young Populus tomentosa Plantation".林业科学 55.10(2019):124-137.