草业科学2025，Vol.42Issue(7)：1653-1662,10.DOI:10.11829/j.issn.1001-0629.2024-0502
青藏高原不同退化程度高寒草甸土壤理化性状典型特征
Soil physicochemical properties at different degradation levels in the alpine meadows of the Tibetan Plateau
摘要
Abstract
This study aimed to explore the evolutionary patterns of soil physicochemical properties at different soil degradation levels and reveal changes in soil quality characteristics during the degradation process in the alpine meadows of the Tibetan Plateau.Taking Maqu County with an extension area east of the Tibetan Plateau as the study location,we utilized an indoor detection and analysis to investigate vegetation characteristics and soil physicochemical properties of alpine meadows at different degradation levels.The results showed that vegetation characteristics,including height of aboveground plant communities,coverage,aboveground biomass,and proportion of edible grass,decreased significantly(P＜0.05)as degradation levels intensified.In severely degraded soils,pH,total salt content,water-soluble calcium ions,sulfate ions,and strontium were the highest,whereas effective trace elements,organic matter,and rapidly available potassium were the lowest.Non-degraded,lightly degraded,and moderately degraded soil maintained a certain level of organic matter and pH stability.Total element content did not show a declining trend with increasing degradation.Correlation and cluster analyses showed that the main characteristics of soil quality degradation were pH,total salt content,water-soluble calcium ions,sulfate ions,available iron,and available zinc in alpine meadows.Soil salinization and calcification trends were observed with an increasing degree of degradation.The results provide a theoretical basis for understanding changes in soil nutrient cycling during degradation in the alpine meadows.关键词
青藏高原/玛曲县/高寒草甸/土壤退化/植被特征/理化性状Key words
Tibetan Plateau/Maqu County/alpine meadow/soil degradation/vegetation characteristics/physicochemical property引用本文复制引用
郭斌,谢志军,王国栋,龚成文,米永伟,邵武平,董高升..青藏高原不同退化程度高寒草甸土壤理化性状典型特征[J].草业科学,2025,42(7):1653-1662,10.基金项目
甘肃省林业和草原局甘肃省草原监测评价科技支撑项目(lcj20220022) （lcj20220022）
