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Effects of continuous manure application on methanogenic and methanotrophic communities and methane production potentials in rice paddy soil

文献类型： 外文期刊

作者： Zhang, Wenzhao 1 ; Sheng, Rong 1 ; Zhang, Miaomiao 1 ; Xiong, Guiyun 3 ; Hou, Haijun 1 ; Li, Shuanglai 3 ; Wei, Wenxue 1 ;

作者机构： 1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China

2.Chinese Acad Sci, Inst Subtrop Agr, Taoyuan Stn Agroecol Res, Changsha 410125, Hunan, Peoples R China

3.Hubei Acad Agr Sci, Inst Plant Protect Soil & Fertilizer, Wuhan 430064, Hubei, Peoples R China

关键词： Manure; Methanogens; Methanotrophs; Methane production potentials; Soil nutritional status; Paddy soil

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN： 0167-8809

年卷期： 2018 年 258 卷

页码：

收录情况： SCI

摘要： Livestock manures are broadly used in agriculture to improve soil productivity; however, the impact of continuous manure application on the behaviors of methanogens (mcrA) and methanotrophs (pmoA) is poorly understood. The objective of this study was to determine the influence of continuous pig manure application on methanogenic and methanotrophic communities and the methane production potentials (MPPs) of rice paddy soil. The results show that adding manure induced significantly higher mcrA gene abundance than chemical fertilizer treatments, and that manure led to higher mcrA gene abundance when it was applied together with full NPK fertilizers than it did when applied with N or NP fertilizers. However, there were no obvious effects of continuous manure application on pmoA gene abundance. The community structures of mcrA and pmoA were distinctly altered by continuous manure application, and their variation was closely associated with fertilizer induced changes in dissolved organic C, total P, and available P and K in the soil. We also observed that manure application along with full NPK fertilizers caused significantly higher MPPs compared to chemical fertilization alone, while manure application with N or NP fertilizers had no obvious effect on MPPs. Moreover, MPPs were positively correlated with mcrA gene abundance, suggesting that continuous manure application may enhance methane emissions by stimulating methane production. Therefore, long-term manure application can affect both the abundance and composition of methanogens, and thus, enhance methane production. This effect is largely dependent on soil nutritional status.

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