An experiment was carried out in the forest area during the spring growing season 2021 to study the physiological role of calcium and potassium spraying on some vegetative growth characteristics in tow potato varieties. The experiment included two potato varieties , calcium in three concentrations (0, 500 and 1000 mg.L-1) and potassium in three concentrations (0, 2.5 and 5 gm. L-1), thus it included 18 treatments (2 x 3 x 3). The experiment was carried out in the field using the Split-Split Plots system within the RCBD design, each treatment was repeated three times. The results showed that Fandango cultivars were significantly superior the as compared to cultivar Sifra inall the studied traits . The plants which treated with both concentrations of calcium 500 and 1000 mg. L-1 achieved a significant increase in most of the studied traits compared to the untreated plants. The plants which treated with concentrations of 2.5 and 5 g.L-1 of potassium achieved a significant increase in the relative chlorophyll content of leaves, while using the concentration of 2.5 g. L-1 led to a significant increase in plant height. On the other hand, the leaf area was significantly increased when using the concentration 5 g. L-1.
An experiment was carried out in the forest area during the spring growing season 2021 to study the physiological role of calcium and potassium spraying some productive characteristics of two potato varieties. The experiment included three factors of 18 treatments. The first factor was two cultivars of imported potatoes Fandango and Sifra, second factor is calcium in three concentrations (0, 500, 100 mg. L-1) the third factor was potassium in three concentrations (0, 2.5, 5 g. L-1). The experiment was carried out in the field using the Split-Split_plot system within the RCBD design, the cultivars were placed in the main plots and calcium concentrations in the secondary plots, while the sub-sub plots included potassium concentrations and each treatment was repeated three times. The results showed that Sifra plants were significantly superior to Fandango plants in the total number of tubers, the yield of one plant, the total yield per unit area, the marketing yield of the plant, and the marketing yield of tubers per unit area. While the plants of the cultivar Fandango were significantly superior to the plants of the cultivar Sifra in total tuber weight.
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