Soil Moisture Rather than Soil Nutrient Regulates the Belowground Bud Bank of Rhizomatous Species Psammochloa villosa in Arid Sand Dunes  

作　　者：Yawei Dong Ziyue Guo Qun Ma Zhiming Xin Jin Tao Jiatai Tian Jinlei Zhu Zhiming Zhang Jianqiang Qian 

机构地区：[1]College of Forestry,Henan Agricultural University,Zhengzhou,450002,China [2]Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang,110164,China [3]Experimental Center of Desert Forestry,Chinese Academy of Forestry,Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station,Dengkou,Bayan Nur,015200,China [4]Institute of Landscape and Plant Ecology,University of Hohenheim,Stuttgart,70599,Germany

出　　处：《Phyton-International Journal of Experimental Botany》2023年第5期1301-1309,共9页国际实验植物学杂志（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(41877542,41907411).

摘　　要：In arid and semi-arid sand dune ecosystems,belowground bud bank plays an important role in population regeneration and vegetation restoration.However,the responses of belowground bud bank size and composition to sand burial and its induced changes in soil environmental factors have been rarely studied.In arid sand dunes of Northwestern China,we investigated belowground bud bank size and composition of the typical rhizomatous psammophyte Psammochloa villosa as well as three key soil environmental factors(soil moisture,total carbon and total nitrogen)under different depths of sand burial.Total buds and rhizome buds increased significantly with increasing burial depth,whereas tiller buds first increased and then decreased,with a peak value at the depth of 20-30 cm.Soil moisture increased significantly with sand burial depth,and was positively correlated with the number of all buds and rhizome buds.Soil total carbon concentration first increased and then decreased with sand burial depth,and total nitrogen concentration was significantly lower under deep sand burial than those at shallow depths,and only the number of tiller buds was positively correlated with soil total nitrogen concentration.These results indicate that soil moisture rather than soil nutrient might regulate the belowground bud bank of P.villosa,and that clonal psammophytes could regulate their belowground bud bank in response to sand burial and the most important environmental stress(i.e.,soil moisture).These responses,as the key adaptive strategy,may ensure clonal plant population regeneration and vegetation restoration in arid sand dunes.

关 键 词：Adaptive strategy clonal plant population regeneration PSAMMOPHYTE vegetation restoration 

分 类 号：S152.7[农业科学—土壤学]