Control of Gas Emissions (N2O and CO2) Associated with Applied Different Rates of Nitrogen and Their Influences on Growth, Productivity, and Physio-Biochemical Attributes of Green Bean Plants Grown under Different Irrigation Methods

Abstract

The use of nitrogenous fertilizers in agriculture can cause uncontrolled gas emissions, such as N2O and CO2, leading to global warming and serious climate change. In this study, we evaluated the greenhouse gases emissions (GHGs) that are concomitant with applied different rates of N fertilization, such as 60%, 70%, 80%, 90%, 100%, 110%, and 120% of the recommended dose in green beans grown under three irrigation systems (surface, subsurface, and drip irrigation). The obtained results showed that GHGs were positively correlated with increasing the rate of N fertilization. Meanwhile, the subsurface irrigation system followed by drip irrigation achieved the highest significant (p ≤ 0.05) values regarding the growth and pod yield attributes. Furthermore, N supplements at 90% and/or 100% of the recommended dose under the subsurface irrigation system led to the highest concentration of chlorophyll, vitamin C, total protein, and activities of antioxidant enzymes, including catalase (CAT), superoxide dismutase (SOD), and peroxidase (POX). Proline and pod fibers were decreased in parallel with increasing the N rate, while water use efficiency (WUE) was improved with increasing the rate of N supplements up to 100% or 110% of the recommended dose.

Limits and potential of organic farming towards a more sustainable European agri-food system

“…Again with a reference to the main environmental themes, some controversial data concern the greenhouse gas emissions and, consequently, the effect on climate changes. In fact, if on one hand there is a substantial agreement regarding the increased ability by land cultivated by organic farming to sequester carbon (Leifeld and Fuhrer, 2010;Gattinger et al, 1997) and to cut nitrous oxide emissions due to not using of synthetic nitrogen fertilizers (Lee et al, 2015;Dutra, 2020;El-Beltagi et al, 2022;Connor, 2021), on the other hand, there are considerable doubts mainly linked to a possible expansion of organic farming. A possible further expansion of lands cultivated by organic would require an increased use of manure as soil fertilizer (Berry et al, 2002) with inevitable rise in methane emissions (Tal, 2018).…”

Acclimatization of In Vitro Banana Seedlings Using Root-Applied Bio-Nanofertilizer of Copper and Selenium

“…Cu ions, as well, suppress the activity of the photosynthetic water splitting system. Copper effects on the photochemistry of photosystem II may reflect in decreasing CO 2 uptake in plant cells [47,48].…”