欢迎访问《草业学报》官方网站,今天是

草业学报 ›› 2026, Vol. 35 ›› Issue (4): 14-28.DOI: 10.11686/cyxb2025198

• 研究论文 • 上一篇    下一篇

高寒草甸退化斑块恢复演替对土壤持水能力的影响

马婧娟1,2(), 李希来1,2(), 尹通江2, 鲍玉英1,2, 张玉芳1,2, 丁北桥1,2, 袁颖1,2   

  1. 1.青海大学省部共建三江源生态与高原农牧业国家重点实验室,青海 西宁 810016
    2.青海大学农牧学院,青海 西宁 810016
  • 收稿日期:2025-05-19 修回日期:2025-08-08 出版日期:2026-04-20 发布日期:2026-02-07
  • 通讯作者: 李希来
  • 作者简介:Corresponding author. E-mail: xilai-li@163.com
    马婧娟(1997-),女,甘肃天水人,在读硕士。E-mail: mjingjuan@163.com
  • 基金资助:
    国家自然科学联合基金重点支持项目(U23A20159);国家自然科学联合基金重点支持项目(U21A20191);青海省科学技术厅项目(2023-QY-210);高等学校学科创新引智计划项目(D18013)

Effects of recovery succession of degraded patches on soil water holding capacity in an alpine meadow

Jing-juan MA1,2(), Xi-lai LI1,2(), Tong-jiang YIN2, Yu-ying BAO1,2, Yu-fang ZHANG1,2, Bei-qiao DING1,2, Ying YUAN1,2   

  1. 1.State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,China
    2.College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China
  • Received:2025-05-19 Revised:2025-08-08 Online:2026-04-20 Published:2026-02-07
  • Contact: Xi-lai LI

摘要:

为探讨不同立地条件下斑块化退化高寒草甸在自然恢复演替过程中土壤持水能力的变化规律,本研究以黄河源区斑块化退化高寒草甸为对象,选择滩地和坡地2种立地条件,将退化高寒草甸按照植被状况划分为裸露斑块(BP)、短期恢复斑块(SRP)、长期恢复斑块(LRP)、健康高寒草甸(HAM)4种不同的恢复演替阶段,基于野外样方调查和室内试验,分析土壤持水量、孔隙度、容重、有机碳以及植物地上和地下生物量的变化规律,并探讨其相关性,揭示不同恢复演替阶段土壤持水能力的差异。结果表明,滩地和坡地斑块化退化高寒草甸裸露斑块在不同恢复演替阶段土壤饱和持水量、毛管持水量、田间持水量、毛管孔隙度、总孔隙度、有机碳以及植物地上和地下生物量均逐渐增加,而土壤容重和非毛管孔隙度均逐渐减少。另外,滩地不同恢复演替阶段土壤饱和持水量、毛管持水量、田间持水量、毛管孔隙度、总孔隙度、有机碳以及植物地上和地下生物量均高于坡地,而土壤容重和非毛管孔隙度均低于坡地。相关性分析结果表明,滩地和坡地土壤饱和持水量、毛管持水量和田间持水量均分别与土壤有机碳、毛管孔隙度、总孔隙度以及植物地上和地下生物量呈显著正相关关系(P<0.05),而均分别与土壤容重和非毛管孔隙度呈显著负相关关系(P<0.05);另外,滩地和坡地的土壤容重与非毛管孔隙度呈显著正相关关系(P<0.05),两者分别与土壤有机碳、毛管孔隙度、总孔隙度以及植物地上和地下生物量呈显著负相关关系(P<0.05),而土壤有机碳、毛管孔隙度、总孔隙度以及植物地上和地下生物量两两之间分别呈显著正相关关系(P<0.05)。总之,斑块化退化高寒草甸的自然恢复演替促进了土壤的持水能力,提高了土壤的水源涵养功能。

关键词: 土壤持水能力, 滩地, 坡地, 斑块化退化, 高寒草甸, 恢复演替, 相关性分析

Abstract:

This research investigated recovery processes in a patchy degraded alpine meadow in the source region of the Yellow River. Variation in soil water holding capacity and related parameters during natural recovery and succession of the studied alpine meadow was evaluated for two site categories, low-lying and sloping grassland. For both site categories, the degraded alpine meadow was divided into four recovery and succession stages defined by vegetation conditions: bare patch (BP), short-term recovered patch (SRP), long-term recovered patch (LRP), and healthy alpine meadow (HAM). Both a field quadrat survey and an indoor experiment were conducted to ascertain the variation in soil water holding capacity, porosity, bulk density, organic carbon, and aboveground and underground biomass of plants. To reveal how soil water holding capacity varied at different recovery or succession stages, the correlations between these variables are explored. The results show that saturated soil water holding capacity, capillary water holding capacity, field water holding capacity, capillary porosity, total porosity, organic carbon and aboveground and underground biomass of plants in the bare patches of the degraded alpine meadow increased gradually with the recovery succession stage, while soil bulk density and non-capillary porosity decreased gradually. In addition, the low-lying grassland had higher soil saturated water holding capacity, capillary water holding capacity, field water holding capacity, capillary porosity, total porosity, organic carbon, aboveground and underground biomass of plants than the sloping grassland at all recovery succession stages, while soil bulk density and non-capillary porosity were lower than those in sloping grassland. Furthermore, soil saturated water holding capacity, capillary water holding capacity and field water holding capacity of low-lying and sloping grassland were significantly positively correlated with soil organic carbon, capillary porosity, total porosity and aboveground and underground biomass of plants (P<0.05), and were significantly negatively correlated with soil bulk density and non-capillary porosity (P<0.05). In addition, there was a significant positive correlation between soil bulk density and non-capillary porosity of both the low-lying and sloping grassland sites (P<0.05), and a significant negative correlation between soil bulk density and soil organic carbon, capillary porosity, total porosity, and aboveground and underground biomass of plants (P<0.05). There was a significant positive correlation between soil organic carbon, capillary porosity, total porosity, and aboveground and underground biomass of plants (P<0.05). In short, the natural recovery succession of the patchily degraded alpine meadow promoted soil water holding capacity and improved the water conservation function of soil.

Key words: soil water holding capacity, low-lying grassland, sloping grassland, patchy degradation, alpine meadow, recovery succession, correlation analysis