不同海拔高度对温性山地草原土壤种子库特征的影响

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关键词：温性山地草原；海拔高度；土壤种子库；物种多样性；环境因子中图分类号：S812.2 文献标识码：A 文章编号：1007-0435（2025）09-2755-10

The impact of Different Altitude on Soil Seed Banks in Temperate Mountainous Grassland

HAN Meng-jie ⋅1，2，3，4 ，LIU Chao，LIANG Hong-fei 1，2，3，4 ，MA Hai-tao 1，2，3，4 ， MA Hong-bin 1，2，3，4 ， SHEN Yan1，2.3.4， WANG Guo-hui1，2.3.4*

（1.KeyLaboraorfoativegEfceyructiodeorgeGass，stroAcluanduralis，ngiUesityiddsityi; 4.FieldScientificObseationadResechStatofteDesetGrasndintheNrSaltLakeofngiaHiutooouRgion， Wuzhong，Ningxia75199，China；5.LuoshanNatioalNatureReserveManagementBureau，Wuzhong，ingxia7599，China）

Abstract： This study focused on the temperate mountainous grassland in Luoshan Nature Reserve of Ningxia， aiming to investigate the characteristic changes of soil seed banks at diferent altitudes.By conducting indoor germination identification experiments of seedlings from the soil seed bank，we studied the seed banks of four altitudes ： T1 （ 2374m） ）， T2 （204号 （2132m） ， T3 （ 1823m ，and T4 （ 1566m. . The results indicated that the average density of soil seed banks at different altitudes ranged from 716.67 to 2333.33 seeds ⋅m-2 ，with perennial herbs predominating.As altitude increased，annual herbs decreased，and the number of seeds exhibited varying trends，mainly concentrating in the 0-5cm soil layer. The diversity of soil seed banks showed significant differences ，and there was a moderate dissmilarity between soil seed banks and aboveground vegetation at different altitudes. The total seed densities of the soil seed banks at T1 ， T2 ， T3 ，and T4 were 2333.33， 866.67，1658.33，and 716.67 seeds·m-2 ，respectively. The total soil seed bank was significantly positively correlated with available phosphorus （ ⋅P<0.05 ）and significantly negatively correlated with soil temperature （ .P<0.05; . Therefore，available phosphorus and temperature had the greatest impact on the species diversity of the total soil seed bank，providing an important basis for formulating ecological restoration strategies.

Key words：Temperate mountainous grassland ;Altitude;Soil seed bank;Species diversity;Environmental factor

土壤种子库是由上层土壤中的凋落物以及所有处于活跃的、休眠或非休眠状态的有活力种子共同构成的[1-2]。（剩余14159字）