生态学杂志2024，Vol.43Issue(6)：1612-1620,9.DOI:10.13292/j.1000-4890.202406.031
不同退化程度高寒草地土壤碳氮磷含量及生态化学计量特征
Contents and eco-stoichiometric characteristics of soil carbon,nitrogen,and phosphorus in alpine grass-lands with different degradation degrees
摘要
Abstract
To clarify the contents and ecological stoichiometric characteristics of soil carbon(C),nitrogen(N),and phosphorus(P)in alpine grasslands under different degradation degrees,we analyzed soil organic C(SOC),N,P,C∶N,C∶P and N∶P in undegraded(ND),lightly degraded(LD),moderately degraded(MD)and se-verely degraded(SD)alpine grasslands.The results showed that soil SOC,N,and P contents showed a decreasing trend with increasing degradation degree of grasslands.The average values of C∶N,C∶P,and N∶P were lower than the global level,all of which showed N-shaped changes with increasing degradation degree.Soil SOC,N,C∶P,N∶P,and N∶P were negatively correlated with soil pH and bulk density(P＜0.05).Soil SOC,N,P,C∶P,and N∶P were positively correlated with soil water content(P＜0.05).Soil P was not significantly correla-ted with soil bulk density(P＞0.05).Soil C∶N was positively correlated with soil pH and bulk density(P＜0.01),and negatively correlated with soil water content(P＜0.01).Results of structural equation modeling indicated that grassland degradation directly affected soil physicochemical properties and thus soil SOC,N,and P content and their eco-stoichiometric ratio.In summary,grassland degradation changed soil microenvironment by reducing soil water content and increasing pH and bulk density,resulting in decreases in the contents of SOC,N,and P.关键词
高寒草地/退化/生态化学计量比/垂直分布Key words
alpine grassland/degradation/eco-stoichiometric ratio/vertical distribution引用本文复制引用
其曼古丽·帕拉提,刘丹,毛军,乔福生,王长庭..不同退化程度高寒草地土壤碳氮磷含量及生态化学计量特征[J].生态学杂志,2024,43(6):1612-1620,9.基金项目
第二次青藏高原综合科学考察研究项目(2019QZKK0302-02)、国家自然科学基金项目(U20A2008,31870407)和西南民族大学中央高校基本科研业务费专项资金优秀学生培养工程项目(2021NYYXS13)资助. （2019QZKK0302-02）
