Effect of Polixal and Seaweed Extract in Nutrients Availability, Growth and Yield of Eggplant Under Protected Conditions

Abstract

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 the effect of spraying seaweed extract (Algaren) at four concentrations (0, 1.5, 3, 4.5 ml L-1) in the readiness of Some nutrients and their concentration in the plant of growth yield of eggplant cv Barcelona, The treatments were assigned to experimental following a randomized completely block design (R.C.B.D.) with three replicates and means were compared according to L.S.D. test at the level 0.05. The results showed the significant superiority of adding a polixal (12 ml L-1) in the average nitrogen content in the leaves (1.273%), and the average phosphorous content in the leaves (0.4458%), the average potassium content in the leaves (1.787 %), The average concentration of phosphorous available in the soil (5.03 MG KG-1), The rate of potassium concentration available in the soil (213.5 MG KG-1) and the average yield of the total hectare reached (16341.0 kg h-1), The results showed the significant superiority of adding spraying seaweed extract (Algaren) at Concentration (4.5 ml L-1) in The average nitrogen content in the leaves (1.260 %), and the average phosphorous content in the leaves (0.3350 %), the average potassium content in the leaves (1.636 %), The average concentration of phosphorous available in the soil (4.62 MG KG-1), The rate of potassium concentration available in the soil (228.3 MG KG-1) and the average yield of the total hectare reached (15037.0 kg h-1).