Urea deep placement reduces yield-scaled greenhouse gas (CH₄ and N₂O) and NO emissions from a ground cover rice production system.

ABSTRACT: Ground cover rice production system (GCRPS), i.e., paddy soils being covered by thin plastic films with soil moisture being maintained nearly saturated status, is a promising technology as increased yields are achieved with less irrigation water. However, increased soil aeration and temperature under GCRPS may cause pollution swapping in greenhouse gas (GHG) from CH₄ to N₂O emissions. A 2-year experiment was performed, taking traditional rice cultivation as a reference, to assess the impacts of N-fertilizer placement methods on CH₄, N₂O and NO emissions and rice yields under GCRPS. Averaging across all rice seasons and N-fertilizer treatments, the GHG emissions for GCRPS were 1973 kg CO₂-eq ha^-1 (or 256 kg CO₂-eq

SUBMITTER: Yao Z 

PROVIDER: S-EPMC5595888 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature