RESPONSEOF WHEAT PLANT TO SELENIUMAPPLICATION INPRESENCEOFSOME ADDITIONSUNDER STRESS CONDITIONS

Abstract

Mona Ibrahim Nossier: Response of Wheat Plant to Selenium Application in Presence of some Additions under Stress Conditions. Unpublished Ph.D. Thesis, Department of Soil Science, Faculty of Agriculture, Ain Shams University, 2016. Selenium is an essential element for humans, animals and some species of microorganisms; however, in higher plants the role of selenium is still unclear. The present investigation was carried out to study the response of wheat plants to selenium application in presence of humic acid, potassium and sodium silicate and compost under salt conditions, the study included evaluation for the impact of this response on productivity of wheat plants. To achieve this goal, two germination experiments were performed in order to choose and define the more suitable concentrations of selenium and other additions. Wheat grains were germinated on different concentrations from sodium selenite (5 – 10 - 20 - 40 - 80 µm/l) and humic acid (0.5 -1 -2gm /1000ml), (1 -5 -10 -20 - 40gm/100 ml) compost extract (12.5 -25 -50 -75 -100%) potassium silicate (1 -2 -4 -8 16%) and sodium silicate (1 -2 -4 -8 -16%) after soaking the grains for 6 hours to select the most suitable concentrations. Wheat grains were then grown on sandy soil, under different concentrations from mixtures consisting of the best suitable concentrations of both selenium and as well as humic acid, compost and silicon under salt stress conditions. Based on the results of above preliminary experiments, field experiments were using performed saline soil.