Effect of polyoxal and Seaweed Extract on some ions in soil, leaves and the early yield of eggplant Solanum melongena L. under protected cultivation

This experiment was carried out in Al-Muthanna Governorate in one of the unheated greenhouses dimensions (9 x 54 m) affiliated to experiment station of agricultural research in Al-Bandar area on the side of the Euphrates River, affiliated to the College of Agriculture / University of Al-Muthanna for the winter agricultural season (2021-2022), to study the effect of adding polixal 20-8 at four concentrations (0, 4, 8, 12 ml L-1 ) and spraying seaweed extract (Algaren) at four concentrations (0, 1.5, 3, 4.5 ml L-1 ) on some ions in soil, leaves and the early yield of eggplant cv. Barcelona, The treatments were assigned to experimental following a randomized completely block design (R.C.B.D.). The results showed the significant superiority of adding a polixal (12 ml L -1 ) on the concentration of calcium, sodium and chloride ions in soil and plant, the calcium ion concentration in the soil was 431.8 PPM, the sodium ion concentration was 150.37 PPM, and the chlorine ion concentration was 1869 PPM, while the calcium ion concentration in the leave was 966.1 PPM, the sodium ion concentration was 443.2 PPM, and the chlorine ion concentration was 241.92 PPM, and the early yield is 1.38 kg house -1 Significant differences were also recorded for the results of spraying seaweed extract with a concentration of 4.5 ml L-1 on all studied traits, increasing the calcium concentration, and decreasing the sodium and chloride ions in the soil and plant as the calcium ion concentration in the soil was 395.3 PPM, the sodium ion concentration was 149.29 PPM and the chlorine ion concentration was PPM 2961, while the calcium ion concentration in the plant was PPM 948.4 and the calcium ion concentration in the plant was PPM 948.4. Sodium 431.9 PPM and chlorine ion concentration 241.92 PPM, and the early yield is 1.05 kg house