الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
 |  | from | 120 |  |  |
| | | from | 120 | | |
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 Unpublished Ph.D. Thesis, Department of Soil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.
Results showed that soaked wheat grains in different
concentrations of mixtures of selenium and humic acid led to
increases in the percentage of germination as well as length of both
shoot and root along with their dry matter contents, were also favored
content of total soluble sugars.
Results also revealed that used mixtures of selenium and
humic acid in saline soil led to increases in resistance of plants to
salinity conditions, therefore decreasing the content of proline
compared to control, in wheat grains were also improved the
proportion of protein and selenium compared to the control.
Key Words:
Wheat, Sodium selenite, Salinity, Humic acid,
Compost, Silicon.