Model and Growth Stage Based Variability of the Irrigation Demand of Onion Crops with Predicted Climate Change

Abstract

Predicted climate change will affect agricultural water resources. Particularly vegetable crops will be concerned due to high water demand and high vulnerability to water scarcity. Present vegetable production already requires irrigation water. To assess future irrigation demand, the impact of climate change needs to be revealed region-and crop-specifically. For robust predictions, a wide range of scenarios has to be simulated using different climate models. The aim of this study is to identify the climate change impact on water availability, precipitation-free periods and irrigation demand of onion crops cultivated in a German model region. Focus is on crop-specific climatic water balance, considering soil characteristics and temperature-driven plant growth. Simulated climate parameters vary between four climate models. However, in all scenarios climate parameters indicate an increasing water demand until 2100. While amount of irrigation water will not increase tremendously, occurrence and duration of dry periods will require efficient irrigation infrastructure and management.

Physiological and Biochemical Responses in Onion Crop to Drought Stress

“…Predicted climate change and global warming have resulted in the emergence of extreme weather events viz. erratic precipitation patterns leading to drought and floods, temperature extremes and soil salinity that act as the major constraint for agricultural productivity particularly the vegetable crops (Schmidt and Zinkernagel, 2017). Drought is one of the major abiotic stress that adversely influences growth and yield of economically important crops.…”

Effect of supplementary irrigation on total antioxidant capacity and phenolic content of hazelnut

“…In several studies, the total antioxidant capacity, total phenolic content and also phenolic and antioxidant active compounds in hazelnut have been reported (Altun et al 2013;Arcan and Yemenicioğlu, 2009;Li and Parry, 2011). The irrigation influences the quality and quantity of product in agriculture (Schmidt and Zinkernagel, 2017). It has been shown that, the irrigation application enhanced the kernel growth and quantity of hazelnut (Cristofori et al, 2014;Külahçılar et al, 2018).…”

Ecosystem Services Mapping Uncertainty Assessment: A Case Study in the Fitzroy Basin Mining Region

“…Differences due to the Climate data temporal scale, K c and Land cover map scenarios show that uncertainty associated with precipitation, evapotranspiration, plant factors and land classification schemes affect modelling outcomes. These factors have also been recognized as key variables affecting relevant ecosystem services in other studies [24,93,94]. A critical and interesting result of this study was from the Climate data temporal scale scenario which showed that ignoring distinctive wet and dry seasons by using an annual model are likely to produce model outputs that are less likely to reflect true values.…”