文献类型：期刊文献

英文题名：Matching root water uptake patterns to fine root and soil water distributions

作者：Zhu, Wei[1,2] Zhao, Dehai[3] Di, Nan[4,5] Li, Doudou[6] Zhou, Ou[1] Sun, Yiming[1] Jia, Liming[1] Ding, Changjun[7] Xi, Benye[1]

第一作者：Zhu, Wei

通信作者：Jia, LM[1];Ding, CJ[2]

机构：[1]Beijing Forestry Univ, Minist Educ Key Lab Silviculture & Conservat, 35 East Qinghua Rd, Beijing 100083, Peoples R China;[2]Jingdezhen Univ, Jiangxi Key Lab Plant Resources & Biodivers, Jingdezhen 333400, Peoples R China;[3]Univ Georgia, Warnell Sch Forestry & Nat Resources, Athens, GA 30602 USA;[4]Inner Mongolia Univ, Minist Educ Key Lab Ecol & Resource Use Mongolian, Hohhot, Peoples R China;[5]Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab Grassland Ecol, Hohhot, Peoples R China;[6]Chinese Acad Med Sci, Inst Med Plant Dev, Peking Union Med Coll, Beijing, Peoples R China;[7]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry Ad, Beijing 100091, Peoples R China

年份：2023

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85175576458);WOS:【SCI-EXPANDED(收录号:WOS:001097775700001)】；

基金：This study was financially supported by the National Key Research and Development Program of China (grant number 2021YFD2201203), the National Natural Science Foundation of China (grant number 32171763), and the National Natural Science Foundation of China (grant number 31872702).

语种：英文

外文关键词：Root water uptake pattern; Fine root distribution; Soil water distribution; Matching degree; Stable isotope; Populus tomentosa

摘要：Aims Exploring the relationships between water uptake, fine root, and soil water is essential for many fields, such as plant physiology, ecological hydrology, and water conservancy.Methods In four Populus tomentosa stands with different ages (young and mature) and stand structures (low and high stand density), we matched root water uptake patterns obtained from stable isotope techniques with fine root and soil water distributions, respectively. The effects of soil water content and meteorological factors on these matching degrees were further explored.Results Increased competition intensity within a stand would suppress the matching degree between fine root distribution and water uptake pattern (M-FR), but have little effect on the matching degree between soil water distribution and water uptake pattern (M-SR). Additionally, water uptake pattern was closer to soil water distribution (average M-SR were 0.89) than to fine root distribution in mature stands (average M-FR were 0.68), while water uptake pattern matched both fine root and soil water distribution closely in young stands (average M(FR )and M-SR were 0.89 and 0.83). There is a relatively high positive or negative correlation between M-FR and M-SR in all four stands. Compared with the direct effect of soil water content, the influence of meteorological factors on matching degrees was weak.Conclusion The results indicate that the expression of water uptake function of the young stand depends on a combination of root structure and available water resources, while the water uptake function of mature stands is driven more by available water resources rather than root structure.