贺兰山不同海拔植被生物量与土壤分形特征和土壤水分的相关关系  

Correlation between vegetation biomass and soil fractal characteristics and soil moisture at different elevations in the Helan Mountains

作　　者：黄业芸 邱开阳[1,2,3,4] 朱亚超 谢应忠[1,2,3,4] 刘王锁[1,2,3,4] 杨壹 王思瑶 崔璐瑶 鲍平安 HUANG Ye-yun;QIU Kai-yang;ZHU Ya-chao;XIE Ying-zhong;LIU Wang-suo;YANG Yi;WANG Si-yao;CUI Lu-yao;BAO Ping-an(College of Forestry and Prataculture,Ningxia University,Yinchuan 750021,China;Ningxia Grassland and Animal Husbandry Engineering Technology Research Center,Ningxia University,Yinchuan 750021,China;Key Laboratory for Model Innovation in Forage Production Efficiency,Ministry of Agriculture and Rural Affairs,P.R.China,Ningxia University,Yinchuan 750021,China;Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University,Yinchuan 750021,China;Ningxia Helan Mountains National Nature Reserve Administration,Yinchuan 750021,China)

机构地区：[1]宁夏大学林业与草业学院,宁夏银川750021 [2]宁夏大学宁夏草牧业工程技术研究中心,宁夏银川750021 [3]宁夏大学农业农村部饲草高效生产模式创新重点实验室,宁夏银川750021 [4]宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏银川750021 [5]宁夏贺兰山国家级自然保护区管理局,宁夏银川750021

出　　处：《草业学报》2023年第12期24-35,共12页Acta Prataculturae Sinica

基　　金：宁夏自然科学基金优秀青年项目(2022AAC05007);国家自然科学基金(42001095)资助。

摘　　要：为了解干旱与半干旱区域山地生态系统植被生物量与土壤分形特征和土壤水分含量的垂直分异规律,探究植被生物量与分形特征和土壤水分的相关关系,选取贺兰山不同海拔典型植被带作为研究区,采用单因素方差分析、Pearson相关分析等方法分析植被生物量、土壤分形特征和土壤水分含量的垂直分异特征及三者间相互关系。结果表明:1)草本植被生物量与灌木植被生物量沿海拔未呈明显的线性变化趋势,灌木植被生物量在浅山灌丛(QSGC)样地具有最大值,草本植被生物量在亚高山灌丛(YGSGC)样地具有最大值,植被条件较好,植被生产力较高。2)贺兰山土壤颗粒以粉粒和极细砂粒为主,随着海拔的升高,土壤质地变细。3)土壤水分含量随海拔增高显著增加,但在青海云杉(QHYS)样地土壤水分含量略低。4)相关分析表明,年降水量以及土壤黏粒含量是影响植被生物量的主要因子。总体上,贺兰山植被生物量、土壤分形特征以及土壤水分含量受多个环境因子共同作用和影响,呈明显的空间异质性。本研究对于揭示贺兰山植被生物量空间变化机制及促进贺兰山退化植被恢复具有重要的意义,可为促进贺兰山山地生态系统植被与土壤资源合理利用提供参考。This research investigated the vertical variation of vegetation biomass,soil fractal characteristics and soil moisture content in arid and semi-arid mountain ecosystems,and investigated the correlation between vegetation biomass,fractal characteristics and soil moisture,in typical vegetation zones at different elevations in the Helan Mountains.Vegetation biomass,soil fractal characteristics and soil moisture content and the vertical variability of these parameters were analyzed by one-way ANOVA and Pearson correlation analysis.It was found that:1)The herb biomass and shrub biomass did not show a linear trend with elevation;The maximum value for shrub vegetation biomass occurred at a shallow mountain scrub sampling site designated QSGC and the maximum value for herbaceous vegetation biomass occurred at a subalpine scrub sampling site designated YGSGC,with better vegetation conditions and higher vegetation productivity.2)The soils in Helan Mountains were comprised mainly of powder-sized and very fine sand particles,and the soil texture became finer as the elevation increased.3)Soil moisture content increased significantly with elevation,but was slightly lower at a sampling site designated QHYS and characterized by presence of Qinghai spruce.4)Correlation analysis showed that annual precipitation and soil clay content were the factors most strongly associated with vegetation biomass.Overall,vegetation biomass,soil fractal characteristics,and soil moisture content in the vegetated Helan Mountains were found to be affected by the combined effects and influences of several environmental factors,showing obvious spatial heterogeneity.This study provides important information about the spatial variation patterns of vegetation biomass in Helan Mountains and apparent causative factors.Such information will assist planning of the restoration of degraded vegetation in the Helan Mountains and will provide reference data for planning the rational use of vegetation and soil resources in the Helan Mountain ecosystem.

关 键 词：海拔 植被生物量 土壤水分含量 土壤颗粒组成 分形维数 

分 类 号：Q948.113[生物学—植物学]