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

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

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...

متن کامل

Tillage, cover crops, and nitrogen fertilization effects on soil nitrogen and cotton and sorghum yields

Sustainable soil and crop management practices that reduce soil erosion and nitrogen (N) leaching, conserve soil organic matter, and optimize otton and sorghum yields still remain a challenge. We examined the influence of three tillage practices (no-till, strip till and chisel till), four cover rops {legume [hairy vetch (Vicia villosa Roth)], nonlegume [rye (Secaele cereale L.)], vetch/rye bicu...

متن کامل

Weed Control Using Conventional Tillage, Reduced Tillage, No-Tillage, and Cover Crops in Organic Soybean

Soybean field experiments were performed to investigate the weed-suppressing effects of different tillage systems and cover crop mulches at two locations in southwest Germany during 2014 and 2015. The influence of three different tillage systems on weed control efficacy, soybean plant density, and crop yield was determined. In the no-till system (NT), two different cover crops, (rye and barley)...

متن کامل

Nitrogen, tillage, and crop rotation effects on nitrous oxide emissions from irrigated cropping systems.

We evaluated the effects of irrigated crop management practices on nitrous oxide (N(2)O) emissions from soil. Emissions were monitored from several irrigated cropping systems receiving N fertilizer rates ranging from 0 to 246 kg N ha(-1) during the 2005 and 2006 growing seasons. Cropping systems included conventional-till (CT) continuous corn (Zea mays L.), no-till (NT) continuous corn, NT corn...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Canadian Journal of Soil Science

سال: 2023

ISSN: ['0008-4271', '1918-1841']

DOI: https://doi.org/10.1139/cjss-2023-0017