Nongrowing season soil nitrous oxide emissions as influenced by cover crops and fall tillage termination
نویسندگان
چکیده
Cropland soil is a major driver of global nitrous oxide (N 2 O) emissions. In cold climates, nongrowing season (NGS) emissions can be significant due to high fluxes during freeze–thaw (FT) cycles. Cover crops alter key conditions that govern N O-producing microbial processes, with multiple potential pathways either increase or decrease O production FT Cultivating cover in the fall terminate may further disrupt these processes and overall impact on Yet, few studies have touched how termination practices over NGS. Using flux gradient method continuously measure from conventional corn–soybean rotation, we investigated effects summer-established (perennial ryegrass crimson clover) (with crops, +CC; without −CC) when terminated by cultivation cultivation, +FC; −FC) six-month NGS was characterized several freezing thawing periods. Crimson clover crop completely winterkilled, while survived +CC−FC field. Total (Nov–Apr) varied nearly 2.5-fold among treatments 395.1 (−CC−FC) 978.1 (+CC+FC) g O-N ha −1 . Compared control treatment (−CC−FC), alone (−CC+FC) (+CC−FC) increased total emissions, even more. Careful CC species selection management are important avoid elevated
منابع مشابه
Nitrous oxide emissions
H. W. Bange1,7, M. O. Andreae1, S. Lal2, C. S. Law3, S. W. A. Naqvi4, P. K. Patra2,8, T. Rixen5,9, and R. C. Upstill-Goddard6 1Max Planck Institute for Chemistry, Mainz, Germany 2Physical Research Laboratory, Ahmedabad, India 3Plymouth Marine Laboratory, Plymouth, United Kingdom 4National Institute of Oceanography, Dona Paula, Goa, India 5University of Hamburg, Hamburg, Germany 6University of N...
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ژورنال
عنوان ژورنال: Canadian Journal of Soil Science
سال: 2023
ISSN: ['0008-4271', '1918-1841']
DOI: https://doi.org/10.1139/cjss-2023-0017