Impact of agronomy practices on the effects of reduced tillage systems on CH4 and N2O emissions from agricultural fields: A global meta-analysis

PloS One
Jinfei FengFuping Fang

Abstract

The effect of no- and reduced tillage (NT/RT) on greenhouse gas (GHG) emission was highly variable and may depend on other agronomy practices. However, how the other practices affect the effect of NT/RT on GHG emission remains elusive. Therefore, we conducted a global meta-analysis (including 49 papers with 196 comparisons) to assess the effect of five options (i.e. cropping system, crop residue management, split application of N fertilizer, irrigation, and tillage duration) on the effect of NT/RT on CH4 and N2O emissions from agricultural fields. The results showed that NT/RT significantly mitigated the overall global warming potential (GWP) of CH4 and N2O emissions by 6.6% as compared with conventional tillage (CT). Rotation cropping systems and crop straw remove facilitated no-tillage (NT) to reduce the CH4, N2O, or overall GWP both in upland and paddy field. NT significantly mitigated the overall GWP when the percentage of basal N fertilizer (PBN) >50%, when tillage duration > 10 years or rainfed in upland, while when PBN <50%, when duration between 5 and 10 years, or with continuous flooding in paddy field. RT significantly reduced the overall GWP under single crop monoculture system in upland. These results suggested that...Continue Reading

References

Nov 15, 2011·Neurobiology of Aging·Bruce R ReedHelena C Chui
Nov 7, 2012·Journal of Environmental Quality·Upendra M SainjuMark A Liebig
Mar 19, 2013·Global Change Biology·Chris van KesselKees Jan van Groenigen
Jun 5, 2013·Global Change Biology·Huaihai ChenWei Shi
Apr 5, 2014·Scientific Reports·Shamsudheen MangalasserySacha J Mooney
Sep 5, 2015·Scientific Reports·Ingrid M LubbersJan Willem van Groenigen
May 29, 2016·The Science of the Total Environment·Sonia García-MarcoIgnacio Mariscal-Sancho

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Citations

Sep 22, 2019·The Science of the Total Environment·Mônica Matoso CampanhaArminda Moreira de Carvalho

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