Mitigating N2O emissions from agricultural soils with fungivorous mites
Mitigating N2O emissions from agricultural soils with fungivorous mites
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DOI：
10.1038/s41396-021-00948-4
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
Haoyang Shen;Y. Shiratori;Sayuri Ohta;Yoko Masuda;K. Isobe;K. Senoo
中科院分区：
文献类型：
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作者：
Haoyang Shen;Y. Shiratori;Sayuri Ohta;Yoko Masuda;K. Isobe;K. Senoo
一氧化二氮（N2O）是一种重要的温室气体和臭氧消耗物质。由于N2O在大气中的长期持久性，减少农业土壤中的人为N2O排放是迫切需要的，这些排放主要来自微生物N2O产生过程，包括细菌、古菌和真菌的硝化和反硝化作用。中型底栖动物通过消耗土壤中的微生物生物量影响微生物过程。然而，微生物消耗如何影响N2O排放在很大程度上是未知的。在这里，我们报告的重要作用，食菌螨，在农业土壤中的主要中型动物群，在调节N2O生产的真菌，其结果可以应用于减轻N2O排放。我们发现，椰子壳是椰子的低价值部分，通常用作农业中的土壤改良剂，由于其多孔结构，将其应用于土壤可以为食菌螨提供有利的栖息地，从而增加农业领域中的螨丰度。由于螨类迅速消耗土壤中真菌N2O生产者，螨类丰度的增加大大减少了土壤中N2O的排放。研究结果为土壤N2O排放机理提供了新的认识，为土壤N2O减排提供了新的思路。
Nitrous oxide (N2O) is an important greenhouse gas and an ozone-depleting substance. Due to the long persistence of N2O in the atmosphere, the mitigation of anthropogenic N2O emissions, which are mainly derived from microbial N2O-producing processes, including nitrification and denitrification by bacteria, archaea, and fungi, in agricultural soils, is urgently necessary. Members of mesofauna affect microbial processes by consuming microbial biomass in soil. However, how microbial consumption affects N2O emissions is largely unknown. Here, we report the significant role of fungivorous mites, the major mesofaunal group in agricultural soils, in regulating N2O production by fungi, and the results can be applied to the mitigation of N2O emissions. We found that the application of coconut husks, which is the low-value part of coconut and is commonly employed as a soil conditioner in agriculture, to soil can supply a favorable habitat for fungivorous mites due to its porous structure and thereby increase the mite abundance in agricultural fields. Because mites rapidly consume fungal N2O producers in soil, the increase in mite abundance substantially decreases the N2O emissions from soil. Our findings might provide new insight into the mechanisms of soil N2O emissions and broaden the options for the mitigation of N2O emissions.