生态学杂志2025，Vol.44Issue(8)：2476-2486,11.DOI:10.13292/j.1000-4890.202508.002
青藏高原高寒生态系统土壤呼吸对氮添加的响应:Meta分析
Response of soil respiration to nitrogen addition in alpine ecosystem of Qinghai-Tibet Plateau:Meta analy-sis
摘要
Abstract
The intensification of climate change and human activities has led to an increase in exogenous nitrogen input in alpine ecosystems,resulting in an increase in carbon emissions.In this study,with a database of 30 papers related to Qinghai-Tibet Plateau alpine ecosystems,a meta-analysis was performed to evaluate the response of soil respiration in alpine ecosystems to N addition.N addition had a significant positive effect on soil respiration in al-pine ecosystems(P＜0.05).N addition rate dominated the positive/negative effect on soil respiration,in that ≤200 kg N·hm-2.a-1 significantly promoted soil respiration,and the promotion of soil respiration at＞200 kg N·hm-2·a-1 was significantly weakened.There was a 2-year threshold value for the positive effect of N addition duration on soil respiration(P＜0.05),in that＞2-year N addition significant decreased the positive effect of N addition on soil respiration.The differences in the positive effects of N addition on soil respiration in different alpine ecosystems were significant(P＜0.05),i.e.,subalpine forest＞alpine meadow＞alpine swamp wetland.The positive effect of N addi-tion on soil respiration was mostly significant in an average annual temperature＞2 ℃,or annual precipitation＞800 mm,or altitude ≤3000 m in Qinghai-Tibet Plateau alpine ecosystems.This study can provide theoretical and prac-tical basis for ecological protection in alpine vulnerable areas of China.关键词
青藏高原/高寒生态系统/土壤CO2排放/氮输入/Meta分析Key words
Qinghai-Tibet Plateau/alpine ecosystem/soil CO2 emission/nitrogen input/meta analysis引用本文复制引用
郝颖琦,王玉英,吴鹏飞,任晓,魏雪,张雅娴..青藏高原高寒生态系统土壤呼吸对氮添加的响应:Meta分析[J].生态学杂志,2025,44(8):2476-2486,11.基金项目
西南民族大学引进人才科研启动项目(RQD2022042)、四川省自然科学基金项目(2023NSFCO194)和西南民族大学草学双一流项目(CX2023019)资助. （RQD2022042）
