Effects of different fertilization practices on CH4 and N2O emissions in various crop cultivation systems: A case study in Kazakhstan

Abstract

The present study investigates the effects of different fertilization practices, including chemical and organic fertilizers, on CH4 and N2O emissions in various crop cultivation systems in Kazakhstan. The research focuses on three staple crops: wheat, barley, and corn, which are commonly grown in the region. A randomized complete block design field trial was conducted with three replications for each crop, totaling 27 plots. Gas sampling was carried out five times between June and September 2021, with cylindrical gas sampling chambers inserted into the soil at a depth of 10 cm. The concentrations of CH4 and N2O were analyzed using GS-MS. Results reveal that all three crops exhibited moderate to high CH4 and N2O emissions, with corn consistently displaying the highest emissions. Both chemical and organic fertilizers led to increased emissions of CH4 and N2O compared to control plots. The organic fertilizer treatment occasionally showed slightly higher emissions compared to chemical fertilizer treatment. However, the differences in CH4 and N2O concentrations between fertilized and unfertilized plots were not drastically significant. Notably, environmental factors, such as soil moisture and temperature, played a more prominent role in influencing CH4 and N2O production than the type of fertilizer applied. These findings underscore the significance of optimizing fertilization practices to minimize greenhouse gas emissions while maintaining crop productivity and promoting sustainable agriculture in Kazakhstan.

The Influence of Organic-Mineral Foliar Fertilizers on Soil Mineral Nitrogen, Nitrous Oxide Emissions and Crop Productivity

“…agricultural crops. In various soil and climatic zones of Kazakhstan, studies of the issue of greenhouse gas emissions during crop production were carried out [37][38][39].…”

Effects of Organic Fertilizers on the Quality, Yield, and Fatty Acids of Maize and Soybean in Southeast Kazakhstan

“…Organic fertilizers in sustainable agriculture are widely applied to increase maize and soybean yield [13]. Organic fertilizers effectively provide an economical and environmentally friendly means of increasing the quantity and quality of grain by stimulating the emission of plant hormones that retain C and N in the plant biomass and releasing greenhouse gases [14,15]. Biologically active compounds released by organic fertilizers have a positive effect on yield and quality indicators, such as fatty acids, vitamins, amino acids, and polypeptides [16][17][18].…”