Crop Coefficient Estimation and Effect of Abscisic Acid on Red Cabbage Plants (Brassica oleracea var. Capitata) under Water-Stress Conditions

Abstract

Understanding the anticipated impact of climate change on agriculture, as well as water conservation, is critical to achieving food security. Therefore, during this critical time and due to reduced water resources and increased food demand, it is important to study the impact of water-stress conditions on crops. Two successive seasons were carried out through the 2021 and 2022 seasons to estimate the crop coefficient (Kc) and study the effect of abscisic acid on red cabbage plants (Brassica oleracea var. capitata) under water-stress conditions at a private farm in the Bilbeis region, Sharqia Governorate, Egypt. The aim was to estimate the crop coefficient (Kc) and effect of different concentrations of abscisic acid (ABA) (0, 25, 50, and 75 ppm) under various irrigation levels (100, 80, and 60% of field capacity “FC”) on the growth process and yield parameters of red cabbage plants. The results revealed that the average estimated crop coefficient (Kc) for red cabbage crops under standard conditions, 100% of FC, was 0.75, 1.07, 1.2 and 0.88 and 0.77, 1.2, 1.25 and 0.82 for Initial, Development, Mid, and End stages during the 2021 and 2022 growing seasons, respectively. Data collected during both seasons clearly showed that all treatments significantly increased both the plant’s growth process and yield parameters when compared to the control. However, abscisic acid (ABA, 75 ppm) application with irrigation requirements (80% of FC) was statistically the most effective treatment in this study. Hence, this means a water savings of 20% can be achieved without significantly compromising the yield.

Effect of Deficit Irrigation with Saline Water on Chemical Properties for Red Cabbage (Brassica oleracea var. capitate L.) under Drip Irrigation

“…It also showed a decrease in these values sequentially when using fresh water with GR emitter compared to using the same dripper with saline water under 0.75% and 0.50%, 1% IF where it reached (135.7,128.5,121.7) and (110.8,97.3,97.7) mg/100 g respectively. In the same figure, it appeared that when the Turbo emitter overlapped with the water quality under different levels of stress, chlorophyll values decreased with the use of saline water at levels of 0.75%IF,0.50%IF,1%IF compared to the Turbo emitter with fresh water in (131.5,128.2,121) and (110.4,99.4,98.3) respectively mg/100g, and this is what communicating with [27]and this may be attributed to the negative effect of water salinity in increasing osmotic pressure and decreasing nutrient absorption.…”

Reducing Deep Percolation Losses Using a Geotextile Layer at Different Soil Depths and Irrigation Levels for Lettuce Crop (Lactuca sativa L. var. capitata) (Limor)

“…It is important to investigate deficit irrigation scenarios and their effect on crop productivity in order to fill the food gap and reduce pressure on water resources. [7].…”