Showing papers in "Journal of Agrometeorology in 2021"

Maize productivity analysis in response to climate change under different nitrogen management strategies

Abstract: The evidence of climate change is ubiquitous with an increase in temperature and CO2 concentration, changing precipitation patterns, increased number and severity of climate-related natural disasters, such as heat waves, droughts, severe storms, cyclones, and flooding (Anonymous, 2020). Since agriculture is heavily dependent on weather and climate, the climate extremes may interrupt crop growth, irrigation patterns, water use efficiency, soil health, and its biodiversity, which leads to a reduction in food production and thus, poses threats to food security. The global mean temperature has increased by 0.8°C since 1850s. It is projected to increase by 2 to 7°C at the end of the century (Allison et al., 2009). The atmosphere’s CO2 concentration has risen from 284 to 412 ppm from 1832 to 2020. The CO2 is expected to increase to 798 ppm by the end of the century (Tans and Keeling, 2014). The rising temperature and CO2 concentration could significantly affect crop production in different regions of the world. Globally, the range of yield changes under different climatic scenarios for wheat, rice, maize, and soybean are -6.9 to 22.4 per cent, -3.3 to -10.8 per cent, -8.6 to -27.8 per cent, and -3.6 to -11.6 per cent, respectively. On average, 1.00C increase in global mean temperature would reduce global production of wheat by 6.0, rice by 3.2, and maize by 7.4 and soybean by 3.1 per cent (Zhao et al., 2017).