草原与草坪2026，Vol.46Issue(2)：89-96,8.DOI:10.13817/j.cnki.cyycp.2026.02.010
海拔梯度下高寒草甸土壤有机碳、全氮含量的影响因素研究
Study on influencing factors of soil organic carbon and total nitrogen in alpine meadow under altitude gradient
摘要
Abstract
[Objective]This study aims to investigate the characteristics and influencing factors of soil organic carbon and total nitrogen contents in alpine meadow across an altitudinal gradient in Golog Tibetan Autonomous Pre-fecture,Qinghai Province.[Method]Using methods such as stepwise regression and path analysis,the surface soil(0～20 cm)of alpine meadows at an altitude of 3,300～4,500 m in Golog Tibetan Autonomous Prefecture was stud-ied.The influencing factors were analyzed to provide an important reference for estimating carbon and nitrogen stor-age on the Qinghai-Tibet Plateau.[Result]The results showed that the soil organic carbon and total nitrogen con-tent in the 0～20 cm soil layer of the alpine meadows in the study area ranged from 39.79～72.51 g/kg and 3.65～6.48 g/kg,with average values of 62.3 g/kg and 5.7 g/kg,respectively.Both exhibited a fluctuating trend with in-creasing altitude.Stepwise regression analysis established multiple regression equations between total nitrogen con-tent,soil organic carbon content,and other physicochemical factors:SOC=27.97+10.12TN-3.62pH+0.57AP+0.01AK and TN=-4.09+0.07SOC+0.01AN+0.47pH,Indicating that interactions among soil physi-cochemical properties jointly influenced soil carbon and nitrogen content.Soil organic carbon and total nitrogen con-tent were significant direct influencing factors for each other.Soil pH,available potassium,and available phosphorus content indirectly affected soil organic carbon through other factors,while soil pH and alkaline hydrolysable nitrogen content indirectly affected soil total nitrogen content through other factors.[Conclusion]The soil in the study area are relatively fertile,with high levels of organic matter and total nitrogen content,providing sufficient nutrients for vegeta-tion growth.Increasing available soil nutrients and rationally regulating pH are conducive to the accumulation of soil organic carbon and total nitrogen content.关键词
高寒草甸/海拔/土壤理化特性/有机碳/全氮/影响因素Key words
alpine meadow/altitude/soil physical and chemical characteristics/organic carbon/total nitrogen/influencing factor分类
农业科技引用本文复制引用
戢爽,邱巡巡,吴昊坤,谢惠春..海拔梯度下高寒草甸土壤有机碳、全氮含量的影响因素研究[J].草原与草坪,2026,46(2):89-96,8.基金项目
青海省青藏高原药用动植物资源重点实验室项目(2020-YJ-Y40) （2020-YJ-Y40）
