草地学报 ›› 2026, Vol. 34 ›› Issue (1): 107-117.DOI: 10.11733/j.issn.1007-0435.2026.01.011

• 研究论文 • 上一篇    

甘南不同退化程度高寒草甸土壤持水能力与化学计量特征研究

杨卓丽, 柳小妮, 张德罡, 漆昊, 纪童, 何国兴, 李娅丽, 汪云君, 马成龙, 李佳缙, 于耀鑫   

  1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室, 甘肃 兰州 730070
  • 收稿日期:2024-12-20 修回日期:2025-05-21 发布日期:2025-12-24
  • 通讯作者: 柳小妮,E-mail:liuxn@gsau.edu.cn
  • 作者简介:杨卓丽(2000-),女,汉族,甘肃天水人,硕士研究生,主要从事草地资源与生态研究,E-mail:1922858757@qq.com;
  • 基金资助:
    甘肃农业大学草地生态系统教育部重点实验室揭榜挂帅项目(KLGE-2024-01);甘肃省草原监测评价(GSZYTC-ZCJC-21010);2021年自列省级林业和草原科技项目(2021kj071);甘肃省新一轮草原补奖效益评估及草原生态评价研究(XZ20191225);2023年提前批中央财政林业改革发展资金草原科技支撑项目“河西走廊脆弱生态区草原生态健康评估”(2023211)项目资助

Water-holding Capacity and Stoichiometric Characterization of Alpine Meadow Soils with Different Degradation Levels in Gannan

YANG Zhuo-li, LIU Xiao-ni, ZHANG De-gang, QI Hao, JI Tong, HE Guo-xing, LI Ya-li, WANG Yun-jun, MA Cheng-long, LI Jia-jin, YU Yao-xin   

  1. College of Pratacultural Science, Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou, Gausu Province 730070, China
  • Received:2024-12-20 Revised:2025-05-21 Published:2025-12-24

摘要: 为探究土壤持水能力与化学计量特征之间的关系及影响因素,本研究以甘南高寒草甸为对象,分析不同退化程度高寒草甸土壤持水能力、土壤有机碳(Soil organic carbon,SOC)、氮(Nitrogen,N)、磷(Phosphorus,P)、土壤有机碳储量(Soil organic carbon storage,SOCS)、全氮储量(Total nitrogen storage,TNS)、全磷储量(Total phosphorus storage,TPS)和化学计量比的变化特征及关系。结果表明:土壤持水能力随退化程度加剧而降低,且表层变化最显著;SOC、N、P、SOCS、TNS、碳磷比(C∶P)和氮磷比(N∶P)随退化程度的加剧而降低;土壤持水能力与植被盖度、生物量、高度、毛管孔隙、总孔隙、SOC、N、P、C∶P、N∶P、SOCS、TNS极显著正相关,与土壤容重极显著负相关, Monte-Carlo检验表明土壤容重对持水能力解释度最高(81.8%),且植被盖度、土壤孔隙、SOC、C∶P、TN、TP均为显著影响因子。因此,在高寒草甸生态修复和管理中,应协同优化植被与土壤改良措施,以同步提升持水性能和生态功能。

关键词: 高寒草甸, 退化, 土壤持水能力, CNP化学计量特征

Abstract: To investigate the relationship between soil water-holding capacity and chemical characteristics, as well as the influencing factors, this study took the high-altitude cold meadows of Gannan as the research object, and analyzed the soil water-holding capacity, soil organic carbon (SOC), nitrogen (N), phosphorus (P), soil organic carbon storage (SOCS), total nitrogen storage (TNS), total phosphorus storage (TPS), and stoichiometric ratios. The results indicated that soil water-holding capacity decreased with increasing degradation severity, with the most significant changes in the surface layer; SOC, N, P, SOCS, TNS, carbon-phosphorus ratio (C∶P), and nitrogen-phosphorus ratio (N∶P) decreased with increasing degradation severity; Soil water-holding capacity was extremely significantly positively correlated with vegetation cover, biomass, height, capillary porosity, total porosity, SOC, N, P, C∶P, N∶P, SOCS, and TNS, and extremely significantly negatively correlated with soil bulk density. Monte Carlo tests indicated that soil bulk density had the highest explanatory power for water-holding capacity (81.8%), and vegetation cover, soil porosity, SOC, C∶P, TN, and TP were significant influencing factors. Therefore, in the ecological restoration and management of alpine meadows, vegetation and soil improvement measures should be optimised in a coordinated manner to simultaneously enhance water retention capacity and ecological functions.

Key words: Alpine meadows, Degradation, Soil water-holding capacity, CNP stoichiometric characterization

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