稻田水分管理和秸秆还田对甲烷排放的微生物影响
为了探讨不同水分管理和秸秆还田对稻田甲烷排放的影响机理,依托中国科学院亚热带农业生态研究所长沙农业环境监测研究站长期定位试验,选择长期淹水(CF)、秸秆还田+长期淹水(HS+CF)、常规灌溉(IF)、秸秆还田+常规灌溉(HS+IF)4个处理,应用限制性片段长度多态技术(T-RFLP)和实时荧光定量PCR技术在DNA和c DNA水平对比研究不同水分管理和秸秆还田影响稻田土壤甲烷排放的微生物分子机理。结果表明:长期淹水处理的甲烷排放量显著高于常规灌溉处理,秸秆还田处理对甲烷排放的影响不显著。产甲烷菌和甲烷氧化菌群落结构只对土壤水分管理产生响应,对秸秆还田没有响应。水分管理和秸秆还田显著影响产甲烷菌...
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Published in | 农业工程学报 Vol. 32; no. S2; pp. 69 - 76 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
中国科学院亚热带农业生态研究所,长沙农业环境观测研究站,长沙 410125%中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,公共技术服务中心,长沙 410125
2016
中国科学院亚热带农业生态研究所,桃源农业生态试验站,长沙 410125%中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,公共技术服务中心,长沙 410125 中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,公共技术服务中心,长沙 410125 湖南省桃源县农业局,桃源 415700 中国科学院大学,北京 100049%中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,公共技术服务中心,长沙 410125 |
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Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.11975/j.issn.1002-6819.2016.z2.010 |
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Abstract | 为了探讨不同水分管理和秸秆还田对稻田甲烷排放的影响机理,依托中国科学院亚热带农业生态研究所长沙农业环境监测研究站长期定位试验,选择长期淹水(CF)、秸秆还田+长期淹水(HS+CF)、常规灌溉(IF)、秸秆还田+常规灌溉(HS+IF)4个处理,应用限制性片段长度多态技术(T-RFLP)和实时荧光定量PCR技术在DNA和c DNA水平对比研究不同水分管理和秸秆还田影响稻田土壤甲烷排放的微生物分子机理。结果表明:长期淹水处理的甲烷排放量显著高于常规灌溉处理,秸秆还田处理对甲烷排放的影响不显著。产甲烷菌和甲烷氧化菌群落结构只对土壤水分管理产生响应,对秸秆还田没有响应。水分管理和秸秆还田显著影响产甲烷菌的数量,却对甲烷氧化菌数量没有影响。产甲烷菌和甲烷氧化菌群落组成和表达群落组成存在明显的分异,c DNA水平上产甲烷菌和甲烷氧化菌表达群落组成对水分管理的响应比DNA水平群落组成更敏感。稻田甲烷排放通量与mcr A和pmo A基因丰度和表达丰度均没有显著相关性,只与DNA水平基因丰度比值(mcr A/pmo A)呈显著正相关关系。可以看出,长期淹水处理可以通过改变土壤中产甲烷菌和甲烷氧化菌的群落结构和数量及两者数量的比例来调控甲烷的排放量。 |
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AbstractList | 为了探讨不同水分管理和秸秆还田对稻田甲烷排放的影响机理,依托中国科学院亚热带农业生态研究所长沙农业环境监测研究站长期定位试验,选择长期淹水(CF)、秸秆还田+长期淹水(HS+CF)、常规灌溉(IF)、秸秆还田+常规灌溉(HS+IF)4个处理,应用限制性片段长度多态技术(T-RFLP)和实时荧光定量PCR技术在DNA和c DNA水平对比研究不同水分管理和秸秆还田影响稻田土壤甲烷排放的微生物分子机理。结果表明:长期淹水处理的甲烷排放量显著高于常规灌溉处理,秸秆还田处理对甲烷排放的影响不显著。产甲烷菌和甲烷氧化菌群落结构只对土壤水分管理产生响应,对秸秆还田没有响应。水分管理和秸秆还田显著影响产甲烷菌的数量,却对甲烷氧化菌数量没有影响。产甲烷菌和甲烷氧化菌群落组成和表达群落组成存在明显的分异,c DNA水平上产甲烷菌和甲烷氧化菌表达群落组成对水分管理的响应比DNA水平群落组成更敏感。稻田甲烷排放通量与mcr A和pmo A基因丰度和表达丰度均没有显著相关性,只与DNA水平基因丰度比值(mcr A/pmo A)呈显著正相关关系。可以看出,长期淹水处理可以通过改变土壤中产甲烷菌和甲烷氧化菌的群落结构和数量及两者数量的比例来调控甲烷的排放量。 X171.3; 为了探讨不同水分管理和秸秆还田对稻田甲烷排放的影响机理,依托中国科学院亚热带农业生态研究所长沙农业环境监测研究站长期定位试验,选择长期淹水(CF)、秸秆还田+长期淹水(HS+CF)、常规灌溉(IF)、秸秆还田+常规灌溉(HS+IF)4个处理,应用限制性片段长度多态技术(T-RFLP)和实时荧光定量PCR技术在DNA和cDNA水平对比研究不同水分管理和秸秆还田影响稻田土壤甲烷排放的微生物分子机理。结果表明:长期淹水处理的甲烷排放量显著高于常规灌溉处理,秸秆还田处理对甲烷排放的影响不显著。产甲烷菌和甲烷氧化菌群落结构只对土壤水分管理产生响应,对秸秆还田没有响应。水分管理和秸秆还田显著影响产甲烷菌的数量,却对甲烷氧化菌数量没有影响。产甲烷菌和甲烷氧化菌群落组成和表达群落组成存在明显的分异,cDNA 水平上产甲烷菌和甲烷氧化菌表达群落组成对水分管理的响应比DNA水平群落组成更敏感。稻田甲烷排放通量与mcrA 和pmoA基因丰度和表达丰度均没有显著相关性,只与DNA水平基因丰度比值(mcrA/pmoA)呈显著正相关关系。可以看出,长期淹水处理可以通过改变土壤中产甲烷菌和甲烷氧化菌的群落结构和数量及两者数量的比例来调控甲烷的排放量。 |
Abstract_FL | In order to investigate the mechanism of methane emission based on different water management and rice straw returning, this study determined the CH4 flux and the abundance and community structure of methanogens and methane oxidizing bacteria. Quantitative polymerase chain reaction (qPCR) and terminal restriction fragment length polymorphism (T-RFLP) were used to determine the abundance and community composition ofmcrA-containing methanogens and pmoA-containing methane oxidizing bacteria in DNA and cDNA level from paddy field. The soil samples taken from the paddy soil at Changsha Research Station for Agricultural & Environmental Monitoring of Institute of Subtropical Agricultural, the Chinese Academy of Sciences. Four treatments included the following: CF (balanced fertilizer without rice straw returning and long-term flooding), HS+CF (balanced fertilizer with 6.0 t/hm2 rice straw returning and long-term flooding), IF (balanced fertilizer without rice straw returning and intermittent irrigation), HS+IF (balanced fertilizer with 6.0 t/hm2 rice straw returning and intermittent irrigation). The results showed that long-term flooding significantly increased methane emissions, but not rice straw returning. And there was no significant interaction between the treatments of water management and rice straw returning. The community structure of methanogens and methane oxidizing bacteria were affected by water management, but not by rice straw returning based on cluster analysis. At the level of cDNA, the community structure of methanogens and methane oxidizing bacteria were different between the treatments of long-term flooding and intermittent irrigation under the condition with or without rice straw returning. While, at the level of DNA, the communities structure were only affected by water management under the condition without water management. At the T-RFLP profile, there were obviously difference between the community structure at DNA level and transcriptional community structure at cDNA level of methanogens and methane oxidizing bacteria, which were more sensitive to water management at cDNA level than that at DNA level. The abundance of methanogens were affected by water management and rice straw returning at cDNA and DNA level, but not of methane oxidizing bacteria. CH4 emissions significantly correlated with the ratio of the abundance ofmcrA andpmoA genes at DNA level, not with the abundance ofmcrA orpmoA genes. So the CH4 emissions determined by the ratio of the abundance of methanogens and methane oxidizing bacteria, not of methanogens or methane oxidizing bacteria. In totally, the community structure and abundance of methanogens and methane oxidizing bacteria is more affected by water management than rice straw returning based on the short-tern experiment. The community structure and abundance of methanogens and methane oxidizing bacteria are affected by water management at DNA and cDNA level. The ratio of the abundance of mcrA andpmoA genes is the key to control the methane emissions from paddy field. |
Author | 吴讷 侯海军 汤亚芳 沈建林 刘波 魏文学 秦红灵 |
AuthorAffiliation | 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室公共技术服务中心;中国科学院大学;中国科学院亚热带农业生态研究所桃源农业生态试验站;中国科学院亚热带农业生态研究所长沙农业环境观测研究站;湖南省桃源县农业局 |
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Author_FL | Wu Ne Liu Bo Tang Yafang Qin Hongling Wei Wenxue Hou Haijun Shen Jianlin |
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Title | 稻田水分管理和秸秆还田对甲烷排放的微生物影响 |
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