Root-soil air gap and resistance to water flow at the soil-root interface of Robinia pseudoacacia

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

	Root-soil air gap and resistance to water flow at the soil-root interface of Robinia pseudoacacia
	Liu, X. P.1; Zhang, W. J.1; Wang, X. Y.1; Cai, Y. J.2; Chang, J. G.3
刊名	TREE PHYSIOLOGY
	2015-12-01
卷号	35 期号:12 页码:1343-1355
关键词	Robinia pseudoacacia root-soil air gap soil-root interface water flow resistance at the soil-root interface
ISSN号	0829-318X
通讯作者	Zhang, W. J.
英文摘要	During periods of water deficit, growing roots may shrink, retaining only partial contact with the soil. In this study, known mathematical models were used to calculate the root-soil air gap and water flow resistance at the soil-root interface, respectively, of Robinia pseudoacacia L. under different water conditions. Using a digital camera, the root-soil air gap of R. pseudoacacia was investigated in a root growth chamber; this root-soil air gap and the model-inferred water flow resistance at the soil-root interface were compared with predictions based on a separate outdoor experiment. The results indicated progressively greater root shrinkage and loss of root-soil contact with decreasing soil water potential. The average widths of the root-soil air gap for R. pseudoacacia in open fields and in the root growth chamber were 0.24 and 0.39 mm, respectively. The resistance to water flow at the soil-root interface in both environments increased with decreasing soil water potential. Stepwise regression analysis demonstrated that soil water potential and soil temperature were the best predictors of variation in the root-soil air gap. A combination of soil water potential, soil temperature, root-air water potential difference and soil-root water potential difference best predicted the resistance to water flow at the soil-root interface.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Forestry
研究领域[WOS]	Forestry
关键词[WOS]	THIN-SECTION TECHNIQUE ; HYDRAULIC CONDUCTIVITY ; TAIHANG MOUNTAIN ; PLANT-ROOTS ; COMPUTED-TOMOGRAPHY ; TRANSPIRING PLANTS ; AGAVE DESERTI ; UPTAKE MODEL ; DRYING SOIL ; NORTH CHINA
收录类别	SCI
语种	英语
WOS记录号	WOS:000368440100007
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/14174]
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
作者单位	1.Chinese Acad Sci, Taihangshan Dongpo Forest Ecosyst Res Stn,Inst Ge, State Forestry Adm,Key Lab Agr Water Resources, Hebei Key Lab Agr Water Saving,Ctr Agr Resources, Shijiazhuang 050021, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 3.Shanxi Acad Forestry Sci, Taiyuan 030012, Peoples R China
推荐引用方式 GB/T 7714	Liu, X. P.,Zhang, W. J.,Wang, X. Y.,et al. Root-soil air gap and resistance to water flow at the soil-root interface of Robinia pseudoacacia[J]. TREE PHYSIOLOGY,2015,35(12):1343-1355.
APA	Liu, X. P.,Zhang, W. J.,Wang, X. Y.,Cai, Y. J.,&Chang, J. G..(2015).Root-soil air gap and resistance to water flow at the soil-root interface of Robinia pseudoacacia.TREE PHYSIOLOGY,35(12),1343-1355.
MLA	Liu, X. P.,et al."Root-soil air gap and resistance to water flow at the soil-root interface of Robinia pseudoacacia".TREE PHYSIOLOGY 35.12(2015):1343-1355.