Zinc-nitrogen co-fertilization influences N2O emissions and microbial communities in an irrigated maize field
نویسندگان
چکیده
• Several Zn sources (with or without N) were tested on an irrigated maize crop under semi-arid climate. fertilization increased N 2 O and respiration fluxes in comparison to urea alone. Zinc produced a detrimental effect nitrifying denitrifying communities. Greater of NosZ communities compared other genes was found. The zinc sulphate but not the synthetic chelate concentration grain. Previous studies have shown that use (Zn) fertilizers combined with nitrogen (N) fertilizer (urea) can lead both agronomic (i.e., yields biofortification due synergies between nutrients) environmental by reducing emissions nitrous oxide, O, derived from fertilization) benefits rainfed conditions. However, little is known about Zn-N co-fertilization greenhouse gas (GHG) soil microbial processes involved non-flooded conditions (during dry season). Under these conditions, water-filled pore space continuously fluctuates following periodic pattern temperatures are optimum range for microorganisms. In this context, field experiment conducted using ( Zea mays L.) treated two levels (no application 120 kg ha ?1 as urea), three application, sulphate, applied mixture chelating compounds, DTPA-HEDTA-EDTA). Nitrous methane (CH 4 ) carbon dioxide (CO measured opaque chambers, well total abundances bacteria, archaea nitrifier denitrifier cumulative 0.36 N-N (for chelates) 0.76 sulphate), respect application. emission factors lower (0.34%–0.72%) than IPCC default value 1%. Total nosZ denitrification gene, which reduction dinitrogen (N ), reduced 75% average plots received fertilizers. This may explain higher treatments. contrast case non-irrigated crops, cannot be recommended strategy mitigate despite enhancement availability soil.
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ژورنال
عنوان ژورنال: Geoderma
سال: 2021
ISSN: ['0016-7061', '1872-6259']
DOI: https://doi.org/10.1016/j.geoderma.2020.114735