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首页> 外文期刊>Environmental Science and Pollution Research >Manure amendment increased the abundance of methanogens and methanotrophs but suppressed the type I methanotrophs in rice paddies
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Manure amendment increased the abundance of methanogens and methanotrophs but suppressed the type I methanotrophs in rice paddies

机译：肥料修正案增加了甲烷的丰度和甲蛋白，但抑制了稻米粉末中的I型甲蛋白

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摘要

Methane (CH4) emission is the consequence of CH4 production and consumption performed by methanogens and methanotrophs, respectively. Fertilization is an important factor that regulates the behavior of methanogens and methanotrophs; however, the effect of manure and rice straw addition combined with inorganic fertilizers on these communities is not well understood. This study aimed to explore how manure and rice straw amendments together with inorganic fertilizers influenced the methanogenic and methanotrophic communities in a 31-year fertilized rice paddy. Manure amendment significantly increased the abundance of mcrA and pmoA genes by 61.2% and 63.3% compared with the unfertilized control, whereas inorganic NPK fertilization alone or rice straw addition did not affect their abundances. Manure and rice straw amendments greatly decreased the Shannon index and ACE index of the methanogenic communities, whereas inorganic NPK fertilization alone increased the ACE index of the methanotrophic communities compared with the unfertilized control. Methanosarcinaceae and Methylococcaceae dominated at the family level, representing 23.1-35.0% and 48.7-67.2% of the total reads, for the methanogenic and methanotrophic communities, respectively. Application of manure together with inorganic fertilizers suppressed the Methanocellales methanogens and the type I methanotrophs (Methylococcus and Methylobacter). Fertilization greatly altered the community structure of methanogens and methanotrophs, and manure addition had more apparent effects than rice straw. Moreover, total nitrogen, soil organic carbon, available phosphorus, and available potassium correlated significantly to the abundance, composition, and community structure of methanogens and methanotrophs. In conclusion, our study revealed that long-term manure amendment in combination with inorganic fertilizers significantly increased the abundance of methanogens and methanotrophs, but suppressed the type I methanotrophs in rice paddies.
机译：甲烷（CH4）排放是甲烷增生和甲蛋白酶和甲蛋白酶的CH4生产和消费的结果。施肥是调节甲烷增强和甲蛋白的行为的重要因素;然而，粪肥和稻草加入与无机肥料对这些社区的影响并不充分理解。该研究旨在探讨粪肥和稻草修正案如何与无机肥料相同影响了31岁的受精水稻稻田中的甲烷和甲型营养社区。粪便修正案与未受精的对照相比，将MCRA和PMOA基因的丰富量显着增加了61.2％和63.3％，而单独的无机NPK施肥或稻草添加不会影响它们的丰富。粪便和稻草修正大大减少了甲胺群体的香农指数和ACE指数，而无机NPK施肥与未受精的对照相比，单独增加甲基营养社区的ACE指数。在家庭级别占甲基喹啉和甲基球虫，分别占总读数的23.1-35.0％和48.7-67.2％，用于甲状腺炎和甲脂肪养殖群落。肥料与无机肥料一起抑制甲烷纤维素和I型甲蛋白（甲基球菌和甲基杆菌）。施肥极大地改变了甲烷的群落结构和甲蛋白的结构，粪肥添加比稻草更明显的效果。此外，总氮，土壤有机碳，可用磷和可用钾与甲烷酮和甲蛋白的丰富，组成和群落结构显着相关。总之，我们的研究表明，长期肥料组合与无机肥料的组合显着增加了甲烷增强和甲蛋白的丰富，但抑制了水稻粉末中的I型甲蛋白萎缩。

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