Vol. 5, Issue 5 (2017)
Impact of soil amendments on greenhouse gas emissions in maize (Zea mays L.)
Author(s): P Laxman Rao, G Jayasree, G Pratibha and T Ram Prakash
Abstract: A field experiment was carried out at College Farm, College of Agriculture, Rajendranagar, PJTSAU, Hyderabad, Telangana state, to evaluate the impact of different soil amendments on greenhouse gas (GHG) emissions in maize crop. CO2, N2O and CH4 fluxes from the soil surface were measured thrice a week during the crop growing season using static flux chambers and GC gas analyzer. Adjustments in sampling dates and frequency were made to include specific events such as rainfall, irrigation, temperature, N application or tillage. The application of vermicompost, tanksilt, (Farm Yard Manure) FYM, RDF (Recommended Dose of Fertilizers) and biochar decreased the cumulative CO2 emission (126.3, 124.4, 121.6, 111.13 and 109.18 kg Co2-C ha-1) respectively compared to the control (134.12 kg Co2-C ha-1). The cumulative CH4 emission was recorded in the order of vermicompost > control > biochar > RDF > tanksilt > FYM. The application of RDF, tanksilt, FYM, vermicompost and biochar increased the cumulative nitrous oxide (N2O) emission (1.58, 0.97, 0.78, 0.67 and 0.38 kg ha-1) respectively compared to the control (0.037 kg ha-1). The application of RDF, tanksilt, FYM, vermicompost and biochar increased the N2O emission factor (0.775, 0.41, 0.28, 0.243 and 0.127%) respectively. Highest global warming potential (GWP) and greenhouse gas intensity (GHGI) was observed in the RDF applied plots. Lowest GWP and GHGI being observed in the control and biochar applied plots respectively.
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How to cite this article:
P Laxman Rao, G Jayasree, G Pratibha, T Ram Prakash. Impact of soil amendments on greenhouse gas emissions in maize (Zea mays L.). Int J Chem Stud 2017;5(5):01-06.
