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Biochar addition affected the dynamics of ammonia oxidizers and nitrification in microcosms of a coastal alkaline soil
作者: Song, Yanjing1,2; Zhang, XiaoLi(张晓黎)1; Ma, Bin1; Chang, Scott X.3; Jun Gong(龚骏)1
刊名: BIOLOGY AND FERTILITY OF SOILS
ISSN号: 0178-2762
出版日期: 2014-02-01
卷号: 50, 期号:2, 页码:321-332
关键词: Ammonia oxidation ; amoA gene ; Microbial community ; Nitrogen cycle ; Coastal alkaline soil
学科分类: Soil Science
产权排序: [Song, Yanjing; Zhang, Xiaoli; Ma, Bin; Gong, Jun] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Song, Yanjing] Univ Chinese Acad Sci, Beijing, Peoples R China; [Chang, Scott X.] Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada
通讯作者: Gong, J (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China. yjsong@yic.ac.cn ; jgong@yic.ac.cn
中文摘要: Biochar amendments have frequently been reported to alter microbial communities and biogeochemical processes in soils. However, the impact of biochar application on bacterial (AOB) and archaeal ammonia oxidizers (AOA) remains poorly understood. In this study, we investigated the responses of AOB and AOA to the application of biochar derived from cotton stalk at rates of 5, 10, and 20 % by weight to a coastal alkaline soil during a 12-week incubation. The results showed that the amoA gene of AOB consistently outnumbered that of AOA, whereas only the AOA amoA gene copy number was significantly correlated with the potential ammonia oxidation (PAO) rate (P < 0.01). The significant decrease of PAO rates in biochar treatments occurred after incubation for 4-6 weeks, which were distinctly longer than that in the control (2 weeks). The PAO rates were significantly different among treatments during the first 4 weeks of incubation (P < 0.05), with the highest usually in the 10 % treatment. Biochar application significantly increased the abundance of both nitrifiers in the 4 weeks of incubation (P < 0.05). Biochar amendment also decreased AOA diversity, but increased AOB diversity, which resulted in different community structures of both nitrifiers (P < 0.01), as shown by the differences between the 5 % biochar and the control treatments. We conclude that biochar application generally enhanced the abundance and altered the composition of ammonia oxidizers; the rate of biochar application also affected the rate and dynamics of nitrification, and the risk for increasing the alkalinity and N leaching of the studied soil was lower with a lower application rate.
英文摘要: Biochar amendments have frequently been reported to alter microbial communities and biogeochemical processes in soils. However, the impact of biochar application on bacterial (AOB) and archaeal ammonia oxidizers (AOA) remains poorly understood. In this study, we investigated the responses of AOB and AOA to the application of biochar derived from cotton stalk at rates of 5, 10, and 20 % by weight to a coastal alkaline soil during a 12-week incubation. The results showed that the amoA gene of AOB consistently outnumbered that of AOA, whereas only the AOA amoA gene copy number was significantly correlated with the potential ammonia oxidation (PAO) rate (P < 0.01). The significant decrease of PAO rates in biochar treatments occurred after incubation for 4-6 weeks, which were distinctly longer than that in the control (2 weeks). The PAO rates were significantly different among treatments during the first 4 weeks of incubation (P < 0.05), with the highest usually in the 10 % treatment. Biochar application significantly increased the abundance of both nitrifiers in the 4 weeks of incubation (P < 0.05). Biochar amendment also decreased AOA diversity, but increased AOB diversity, which resulted in different community structures of both nitrifiers (P < 0.01), as shown by the differences between the 5 % biochar and the control treatments. We conclude that biochar application generally enhanced the abundance and altered the composition of ammonia oxidizers; the rate of biochar application also affected the rate and dynamics of nitrification, and the risk for increasing the alkalinity and N leaching of the studied soil was lower with a lower application rate.
研究领域[WOS]: Agriculture
关键词[WOS]: ARBUSCULAR MYCORRHIZAL FUNGI ; COMMUNITY STRUCTURE ; MICROBIAL COMMUNITIES ; AGRICULTURAL SOIL ; BACTERIA RATHER ; NITROGEN-CYCLE ; FOREST SOILS ; ACIDIC SOILS ; WHEAT-STRAW ; ARCHAEA
文章类型: Article
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000330844500012
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/7015
Appears in Collections:海岸带生物学与生物资源利用所重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada

Recommended Citation:
Song, Yanjing,Zhang, Xiaoli,Ma, Bin,et al. Biochar addition affected the dynamics of ammonia oxidizers and nitrification in microcosms of a coastal alkaline soil[J]. BIOLOGY AND FERTILITY OF SOILS,2014,50(2):321-332.
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