Effect of Broccoli Residue and Wheat Straw Addition on Nitrous Oxide Emissions in Silt Loam Soil

Nitrous oxide (N2O) is one of the main greenhouse gases and its emissions from vegetable production systems have brought a sustainability challenge. The objective this study was to evaluate potential reducing N2O silt loam soil by mixing nitrogen (N)-rich broccoli (Brassica oleracea var. italica) residue with wheat straw or water-washed straw. An experiment conducted in randomized complete block design five treatments; unamended control (BS), (+S), (+CR), (+CR+S) washed (+CR+Sw) replicated four times. +CR +S were added at rate 3.5 kg 2.0 fresh matter m−2 their mixtures, +CR+S +CR+Sw, incorporated 60% water-filled pore space (WFPS) packed microcosms. measured once day during 14-day period. Daily fluxes found be reduced on +CR+W +CR+Sw when compared single-amended treatment. Similarly, (2772 µg N h−1) significantly lower than (3606 soon after amendment but did not vary thereafter. Moreover, mixture, +Cr+Sw, resulted net 73.3% 74.2%, respectively, relative While results clearly suggest that emissions, it necessitated further studies, possibly increasing frequency sampling clarify if would mitigate system.