تأثير التغذية الورقية بالزنك و السلينيوم تحت نسب رطوبية مختلفة في بعض الصفات الفسلجية لنبات زهرة الشمس

Abstract EN

Tow field experiments were conducted during the spring season of 2016 and 2017 in the field of experiments near the Deanship of the College of Agriculture, University of Diyala in order to understand some effects and physiological adaptations agoinest drought.

The split-split plot design was designed in the order of the RCBD three replicates.

The moisture were the main plots, zinc concentration sub –plots and the concentrations of the selenium is sub-plots factors as follows: three periods of irrigation after (25%, 50% and 75%) of available water.

The spray of three levels of zinc is (0, 20and 40) mg Zn.

L-1 and four levels of selenium (0, 2, 4and 6) mg Se.

L-1.

Sun flower was planted and the results indicated: The Average of transpiration and Relative water content in the leaves showed an opposite behavior of the Selenocysteine concentration in the grains and Tocopherol concentration, Ascorbic acid concentration in the leaves as the soil moisture content decreased, the average of transpiration and Relative water content decreased while the concentration of other characteristics increased.

The concentration of Tocopherol, Ascorbic acid and Relative water content in the increased with the use of the third level of zinc 40 mg.

L-1 .

compared to control with a significant increase by 89.3%, 33.5% and 5.6% respectively.

The added level 6 mg Se.

L-1 of selenium has exceeded on other levels of Selenocysteine concentration and concentration of Ascorbic acid in plant leaves, while the level 4 mg Se.

L-1 exceeds other levels of Tocopherol in leaves and Relative water content , while control of Se.

has exceeded other levels of average of transpiration in plant leaves.

The overlap (W3 + 40 mg Zn.

L-1 + 4 mg Se.

L-1 ) exceeded the other concentration of concentration Tocophero in plant leaves and Relative water content while the overlap (W3 + 40 mgZn.

L-1 +6 mgSe.

L-1 ) exceeded the other concentrations of Ascorbic acid in leaves.The superiority of the average of transpiration in the plant was in favor of overlap (W1 + 40 mg Zn L-1 + 4 mg Se.

L-1 ) on the other levels.