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大气CO₂浓度升高对稻麦轮作下土壤中AM真菌多样性的影响

EFFECT OF ELEVATED ATMOSPHERIC CO₂ ON ARBUSCULAR MYCORRHIZAL DIVERSITY IN PADDY-WHEAT FIELD

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【Author】 YUAN Xue-xia1, 2, 3 LIN Xian-gui1, 2 ZHANG Hua-yong1, 2 YIN Rui1, 2 CHU Hai-yan1, 2 ZHU Jian-guo4 (1 Laboratory of Biology and Biochemistry,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008; 2 Joint Open Laboratory of Soil and the Environment,Institute of Soil Science, Chinese Academy of Sciences and Hongkong Baptist University,Nanjing 210008; 3 Graduate School of the Chinese Academy of Sciences,Beijing 100049; 4 State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science,Chinese Academy of Sciences), Nanjing 210008)

【机构】中国科学院南京土壤研究所生物与生化研究室；土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) 南京210008 中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室南京210008 中国科学院研究生院北京100049；南京210008 中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室南京210008；南京210008；

【摘要】本试验研究了大气CO2浓度升高对稻麦系统中AM真菌多样性的影响。结果表明,大气CO2浓度升高对土壤中AM真菌侵染能力没有显著影响;在常N施肥处理中,大气CO2浓度升高减少了土壤中AM真菌种类总数,但对AM真菌平均种类数没有显著影响,而在高N施肥处理中大气CO2浓度升高的影响不显著;N肥施用量增加降低了土壤中AM真菌的多样性。更多还原

【Abstract】 Effect of elevated atmospheric CO2 on arbuscular mycorrhizal diversity in paddy-wheat field was investigated. Results showed that no significant effect was found on AM fungal colonization, but in the treatment of normal N application rate, it decreased the total number of AM fungal total species, and however, had no significant effect on the average number of species in every soil sample. In treatments of higher N application rate, the effect on number of species was insignificant. Higher N fertilization decreased AM fungal diversity both in treatments of normal and elevated atmospheric CO2.更多还原