The water use efficiency of maize depending on abiotic stress factors in field experiments

Abstract

There is little direct information about the effects of the abiotic stress factors such as low soil water content on the photosynthesis system of field crops. Some recent publications pay attention to this field of research. Water stress has significant effect on the yield and other agronomic parameters of maize. The aim of our work was to get more data about the relations between water supply and the assimilation parameters. The photosynthetic gas exchange parameters of maize are remarkably improved by nutrient supply in well watered conditions. The water stress through decreased stomatal conductance has significant negative effect on the assimilation parameters of the crops. The obtained results suggest that the water use efficiency of the maize is higher in dry conditions. In well water supply state maize uses up to 300 per cent more water for 1 g CO 2 assimilation.

Soil condition threats in two seasons of extreme weather conditions

“…Similar phenomena have already been observed by other authors as well (Gallardo-Carrera et al 2007, Mulkholm et al 2013. As Dexter (1988) and Csajbók et al (2014) emphasised, tillage alone cannot remedy a soil that has suffered severe degradation. Sufficient (≥ 55%) surface cover was found to be highly useful in alleviation of the climate impact for both degraded (CSD) and preserved (CSP) soils.…”

Farmers’ Perceptions about Irrigation Roles in Climate Change Adaptation and Determinants of the Choices to WUE-Improving Practices in Southern Ethiopia

“…Water application methods like deficit irrigation (Gebremedhin, 2017), prioritizing crops and reducing farm size under 2 Air, Soil and Water Research irrigation (Evans & Sadler, 2008;Schmitter et al, 2017), and adequate land leveling (Government Accountability Office of United states, 2019), improve farm-level WUE by reducing the volume of water consumed. On the other hand, continuous discharge of water to the farms limits the movement of soil oxygen to plant roots, increases the toxicity of nutrients, and decreases crop yields and WUE (Csajbók et al, 2014;SMIS, 2016). In addition, irrigating the farms at peak sunshine hours decreases the ratio of transpiration to evaporation which causes reduced yield and WUE of crops (FAO, 2003).…”