PhD Dissertation Discussion
The Department of Life Sciences at the College of Education for Pure Sciences discussed the doctoral thesis entitled (The effect of spraying with kinetin and nano-potassium on the tolerance of yellow corn (L. Zea mays) to salinity levels of irrigation water), by the student, Rawaa Ghafel Shanana, and under the supervision of Prof. Fish measure.
The discussion aimed to know the extent of response of the yellow corn crop to spraying with kinetin, and to determine the best spray level for the growth and productivity of the growing crop under different levels of salinity of irrigation water, and to determine the best source of potassium added by spraying, which may give positive and significant results in the growth and productivity of yellow corn growing under the conditions of the study, and a study Binary and triple interactions of the study factors to obtain the best treatments in improving the growth and productivity of maize crop growing under different levels of salinity and their effect on increasing the tolerance to high levels of salinity and irrigation water.
The study concluded that the levels of spraying with Kinetin had a significant positive effect on most phenotypic growth characteristics, yield characteristics, physiological growth indicators, nutritional status in plant leaves, CAT, POD and CAT enzyme activity, and yield traits for the two plants, while the concentrations of proline, nitrogen and abscisic were decreased in the leaves of maize plant for the spring season. The increase in the salinity levels of the irrigation water led to a decrease in all phenotypic growth characteristics, yield characteristics, chlorophyll content in leaves, the concentration of nutrients (Nitrogen, Phosphorous, Potassium and K/Na) in the plant leaves during the two plants, an increase in the concentration of proline in the leaves of the two plants, and an increase in the enzyme activity (CAT, SOD, and POD). During the exercises, a decrease in the concentration of the hormone kinetin in the exercises and an increase in abscisic acid during the exercises.
The researcher recommended spraying with nano potassium fertilizer and spraying the maize plant with the hormone kinetin at a concentration of 2 mg.L-1 to reduce the harmful effect caused by irrigation with salt water. The student received an Excellence grade.
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