气候变化领域集成服务门户(CCPortal): Effect of tropical grass and nitrogen fertilization on nitrous oxide, methane, and ammonia emissions of maize-based rotation systems

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DOI	10.1016/j.atmosenv.2020.117571
	Effect of tropical grass and nitrogen fertilization on nitrous oxide, methane, and ammonia emissions of maize-based rotation systems
	Grassmann C.S.; Mariano E.; Rocha K.F.; Gilli B.R.; Rosolem C.A.
发表日期	2020
ISSN	1352-2310
卷号	234
英文摘要	While tropical grasses were shown to inhibit the activity of soil nitrifiers, their role in greenhouse gas (GHG) and ammonia (NH3) emissions in N fertilized maize-based rotations are poorly understood. A 3-year (2014–2017) field experiment was conducted in southeastern Brazil to assess the influence of forage grass and N fertilization on nitrous oxide (N2O), methane (CH4), and NH3 emissions from maize (Zea mays L.)-grass rotations. Guinea grass (Megathyrsus maximus cv. Tanzânia), palisade grass (Urochloa brizantha cv. Marandu), and ruzigrass (Urochloa ruziziensis cv. Comum) were grown in the main plots, while an unfertilized control and 140 kg N ha−1 were applied annually to maize in sub-plots. No apparent nitrification suppression by the grasses was detected. N2O fluxes increased following N fertilizer addition in maize, particularly in the second season, where slightly higher cumulative N2O emission was observed with N fertilization in comparison with the control. CH4 fluxes showed high variation in the first forage and maize growing seasons. Residual N fertilizer decreased soil CH4 uptake of palisade grass and ruzigrass compared with unfertilized palisade grass in the second forage season. Cumulative NH3 emissions were unaffected by forage species and N fertilization. However, in both maize seasons, yield-scaled NH3 emission was the lowest following N addition. Throughout the seasons, the differences between the three grasses in N2O, CH4, and NH3 emissions were minimal. We conclude that the tropical perennial grasses rotated with maize were similar regarding GHG and NH3 emissions, while N fertilization slightly increased N2O emission and decreased soil CH4 uptake. © 2020 Elsevier Ltd
英文关键词	Brachiaria; Nitrogen fertilizer; Nitrogen losses; Panicum; Zea mays L.
语种	英语
scopus关键词	Ammonia; Gas emissions; Grain (agricultural product); Methane; Nitrification; Nitrogen fertilizers; Nitrogen oxides; Rotation; Soils; Tropics; Ammonia emissions; Field experiment; Greenhouse gas (GHG); Maize (Zea mays L.); Maize growing season; Nitrogen fertilization; Soil nitrifiers; Southeastern Brazil; Greenhouse gases; ammonia; crop rotation; fertilizer application; forage; grass; greenhouse gas; maize; methane; nitrification; nitrogen; nitrous oxide; tropical region; Brazil; Brachiaria; Nia; Panicum; Panicum maximum; Poaceae; Urochloa brizantha; Urochloa ruziziensis; Zea mays
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129432
作者单位	College of Agricultural Sciences, São Paulo State University, Av. Universitária, 3780, Altos do Paraíso, CEP 18610-034, Botucatu, SP, Brazil
推荐引用方式 GB/T 7714	Grassmann C.S.,Mariano E.,Rocha K.F.,et al. Effect of tropical grass and nitrogen fertilization on nitrous oxide, methane, and ammonia emissions of maize-based rotation systems[J],2020,234.
APA	Grassmann C.S.,Mariano E.,Rocha K.F.,Gilli B.R.,&Rosolem C.A..(2020).Effect of tropical grass and nitrogen fertilization on nitrous oxide, methane, and ammonia emissions of maize-based rotation systems.Atmospheric Environment,234.
MLA	Grassmann C.S.,et al."Effect of tropical grass and nitrogen fertilization on nitrous oxide, methane, and ammonia emissions of maize-based rotation systems".Atmospheric Environment 234(2020).