Impacts of Integrated Weed management in cropping systems on N2O emissions from soils

International audience

Effect of integrated weed management in cropping system on soils, microbial activity and N2O fluxes

National audience

N2O emissions from cropping systems with integrated weed management

International audience; Integrated weed management (IWM) in cropping systems aims to lower the reliance on herbicides of the crops, by introducing new combinations of agricultural practices in the system development (Munier-Jolain et al, 2009). These combinations may greatly change from a system to another and include a large variety of practices, such as false seed beds, late sowing, mechanical weeding, reduced tillage, specific crop rotations that alternate spring and winter crops, the choice of crop varieties and the use of pesticides with low ecotoxic impacts. Several implemented agricultural practices are likely to alter soil biogeochemical cycles and different components of the greenh…

Impact des systèmes de culture en protection intégrée contre les adventices sur l'intensité des émissions de N2O par les sols

Effects of integrated weed management in cropping systems on soils, microbial activity and N2O fluxes

International audience; Cultivated soils have been widely highlighted as a major source of nitrous oxide (N2O) emissions. This suggests that greenhouse gas emissions should be taken in account when evaluating the impact of new cropping systems. The development of integrated weed management in cropping systems introduces new agricultural practices (combinations of crop rotation, soil management, fertilization, and mechanical and chemical weed control, etc.), which may affect the microbial processes responsible for N2O production in soils. However, the effect of those practices remains to be assessed. Thus, the main objectives of our study is to provide (i) an accurate estimation of the inten…