西南林业大学学报2026，Vol.46Issue(5)：61-67,7.DOI:10.11929/j.swfu.202502037
科尔沁不同退化类型草原土壤微生物的群落结构特征
Characteristics of Soil Microbial Communities in Different Degradation Types of Grasslands in the Horqin Region
摘要
Abstract
Taking the degraded grasslands of the Horqin region as the research object,this study combined phospholipid fatty acid(PLFA)analysis with soil factors to investigate the characteristics and regulatory factors of soil microbial communities in Healthy grassland(CK),Mildly desertified grassland(TH),Moderately desertified grassland(SH),Moderately salinized grassland(MH),and Severely salinized grassland(ZH).The results showed that both the types and contents of PLFA biomarkers varied among the five types of degraded grasslands.A total of 38 PLFA biomarkers were detected,of which 30 were ubiquitously distributed and 8 were partially distributed.The total microbial biomass in soil showed a decreasing trend in the order:CK＞SH＞TH＞MH＞ZH.The microbial community structures of TH,SH,and ZH were highly similar,while those of CK and MH showed low similarity.The total PLFA content,Gram-positive bacteria(G+),Gram-negative bacteria(G-),other bacteria,fungi,and actin-omycetes in soils of the five grassland types were significantly positively correlated with TP,TN,SOC,NO3--N,and NH4+-N,and significantly negatively correlated with soil pH.关键词
草原退化/磷脂脂肪酸/土壤/微生物/群落/科尔沁Key words
grassland degradation/PLFA/soil/microbe/community/Horqin分类
农业科技引用本文复制引用
石涵宇,马星宇,杨柳,朱躲萍,李永华,王海民,姚斌..科尔沁不同退化类型草原土壤微生物的群落结构特征[J].西南林业大学学报,2026,46(5):61-67,7.基金项目
"十四五"国家重点研发计划专题项目(2023YFF1304103-04)资助 （2023YFF1304103-04）
中国林业科学研究院生态保护与修复研究所科技项目(STSTC2023004)资助. （STSTC2023004）
