水土保持研究2025，Vol.32Issue(1)：110-120,11.DOI:10.13869/j.cnki.rswc.2025.01.005
祁连山东段高寒草地修复过程中植被物种多样性及土壤理化性质
Vegetation species diversity and soil physicochemical properties during restoration of alpine grassland in eastern Qilian Mountains
摘要
Abstract
[Objective]The aims of this study are to explore the vegetation species diversity and soil physicochemical properties during the restoration of alpine grassland in the eastern part of Qilian Mountains,and to provide theoretical basis and scientific support for the restoration and development of local ecosystem.[Methods]Using the time-space substitution method,artificial sea buckthorn woodland and unrepaired sample plots(CK)with different restoration years(3 a,6 a and 11 a)were selected as the research objects.Through vegetation investigation and soil collection,the vegetation species diversity and soil physicochemical properties were analyzed,and the changes with the increase of restoration years were revealed.[Results](1)With the extension of restoration years,the dominant species of the community gradually evolved from annual herbs to perennial herbs and shrubs,and the number of plant individuals,species and Margalef richness index showed an increasing trend.(2)With the extension of restoration years,soil water content showed a trend of'increasing-decreasing-increasing',and the overall increase.Soil bulk density decreased,while soil pH,total nitrogen,total phosphorus and organic matter increased.With the deepening of soil layer,soil water content increased in CK and T1,and decreased in T2 and T3.Soil bulk density increased first and then decreased.Soil total nitrogen,total phosphorus,available phosphorus and organic matter decreased,and surface accumulation was obvious.(3)Vegetation individual number was positively correlated with soil water content,available phosphorus and available potassium(p＜0.01),and negatively correlated with bulk density(p＜0.05).Species number was positively correlated with pH value and total phosphorus,and negatively correlated with bulk density(p＜0.01).There was a significant positive correlation between Shannon diversity index and water content(p＜0.01).Pielou evenness index was positively correlated with available potassium,and negatively correlated with water content(p＜0.01).There was a significant positive correlation between Margalef richness index and total phosphorus(p＜0.05),and a significant negative correlation between Margalef richness index and soil bulk density(p＜0.01).[Conclusion]It can be seen that the restoration years have a great impact on vegetation species diversity and soil physical and chemical properties.The plant community gradually becomes single and stable,the soil structure is optimized,and the soil nutrient content is continuously increased,which promotes the restoration of the alpine grassland ecosystem to a certain extent.关键词
高寒草地/人工修复地/不同修复年限/物种多样性/土壤理化性质Key words
alpine grassland/artificially restored ground/different repair years/dpecies diversity/soil physical and chemical properties分类
林学引用本文复制引用
李浩,何静,王理德,宋达成,刘光武,王梁浩然,李诗涵..祁连山东段高寒草地修复过程中植被物种多样性及土壤理化性质[J].水土保持研究,2025,32(1):110-120,11.基金项目
国家自然科学基金"祁连山东段治理矸石重构土壤系统演变及其驱动机制"(42167069) （42167069）
甘肃省重点人才项目"基于"两山"理念的祁连山及石羊河流域生态修复关键技术研究及团队建设"(GZTZ20240415) （GZTZ20240415）
草原生态修复治理科技支撑项目"祁连山东段北麓退化草地修复技术研究与示范"(GLCH20232550302) （GLCH20232550302）
