EFFECT OF ASCORBIC ACID APPLICATION AND WATER LEVELS ON GROWTH, YIELD COMPONENTS OF PEA PLANTS ....

The absence of fresh water and drought stress are two of the most important environmental factors that limit plant productivity in arid and semi-arid regions. During the 2019/2020 academic year, a field experiment was conducted at the National Research Centre's Agricultural Experimental Station in Nubaria, Behiera Governorate, Egypt. In a split-plot design, the experiment was undertaken to see if ascorbic acid may help pea plants cope with the negative consequences of water stress. Three irrigation regimes (80%, 60%, and 40% of water holding capacity) and four levels of ascorbic acid (0, 100, 200, and 300 ppm) applied as foliar spray were used in the study. Water stress lowered chlorophyll, growth, and seed production while increasing proline content and crop water productivity, according to the findings. Under all of the water stress conditions studied, the application of ascorbic acid resulted in the highest macronutrient content. The highest yield parameters (fresh weight, Pod number, and seed number/pod) were achieved after application of ascorbic acid with sufficient irrigation at 80, 60, and 40% WHC, respectively. Grain yield was reduced by 80% when compared to 40% WHC, however the converse was true in terms of water use efficiency, which rose when water stress was raised. Under 80 and 40 percent WHC, respectively, biological production was high following administration of ascorbic acid (300 ppm). Increasing water stress tolerance and productivity of pea plants with appropriate ascorbic acid treatment is a promising technique for increasing tolerance and output.

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