土壤与作物2024，Vol.13Issue(4)：428-438,11.DOI:10.11689/sc.2024021402
大气CO2浓度和温度升高对玉米农田黑土碳库及细菌群落的影响
Effects of elevated atmospheric CO2 concentration and warming on soil carbon pool and microbial community composition in a maize-grown Mollisol
摘要
Abstract
In this study,we used the open top climate chamber(OTC)to simulate the long-term elevated atmospheric CO2 concen-tration and warming.The soil samples were fractionated into cPOC(coarse particulate organic C),fPOC(fine particulate organic C)and MOC(mineral-associated organic C).The change of soil microbial community diversity was analyzed by 16SrRNA high-throughput sequencing,and the mechanism of long-term elevated atmospheric CO2 concentration and warming on soil carbon conversion in dry farming soils was explained.The results showed that 12-yr consecutive climate change did not change the total soil organic carbon,but the turnover rate of soil organic carbon was significantly accelerated.Warming significantly increased fPOC,but decreased MOC.Long-term warming significantly increased the relative abundance of Bryobacter,and this genus was positively correlated with MOC.Long-term elevated atmospheric CO2 concentration did not significantly change the contents of fPOC and MOC.Elevated atmospheric CO2 concentration changed the soil microbial community,and significantly increased the abundance of Gram-negative bacteria Nitrospirae.Long-term elevated atmospheric CO2 concentration and warming increases the turnover rate of SOC,while changes in community structure or genus abundance would further affect SOC stability.关键词
土壤有机碳/气候变化/土壤颗粒态有机碳/矿物结合态有机碳/微生物群落Key words
soil organic carbon/climate change/MOC/POC/microbial community分类
农业科技引用本文复制引用
司马鑫琪,乔云发,金剑,李彦生,于镇华,刘俊杰,顾海东,刘居东,王光华,吴俊江,苗淑杰..大气CO2浓度和温度升高对玉米农田黑土碳库及细菌群落的影响[J].土壤与作物,2024,13(4):428-438,11.基金项目
中国科学院国际大科学计划培育专项(131323KYSB20210004) （131323KYSB20210004）
中国科学院先导项目(XDA28020201) （XDA28020201）
黑龙江省自然科学重点项目(ZD2021D001). （ZD2021D001）
