Master Thesis Viva _Biology Department
Master Thesis Viva in the College of Education for Pure Science entitled
” Vitality of Earthworm Octolasion cyanieum reared in different types of fertilizers ”
The College of Education for Pure Science, University of Mosul, has done the Master Thesis Viva entitled ” Vitality of Earthworm Octolasion cyanieum reared in different types of fertilizers “,
On Sunday, September 24, 2023, the respected Dean of the College, Assistant Professor Dr. Qais Ismail Ibrahim, the Honorable Scientific Associate and Administrative Associate, the Honorable Head of the Department of Biology, and a number of the college’s teachers were attended the viva.
This study, presented by the M.Sc. Student Dhafar Hassan Mohammed Hassan Al-Mohammed in the Department of Biology, was conducted to find out the effect of rearing earthworm Octolasion cyanieum for several time periods (7, 14, 21 and 28 days) in the soil treated with four types of agricultural fertilizers: NPK balanced fertilizer with concentrations (800, 1000, 1500 and 2000 mg. / kg) and urea fertilizer with concentrations (100, 250, 500, 1000 mg/kg) and triple superphosphate fertilizer with concentrations (400, 800, 1200 and 1600 mg/kg) and balanced NPK nano fertilizer with concentrations (30, 60, 120 and 240 mg/kg) as well as a comparison treatment.
The study proved that agricultural chemical and nano fertilizers affected the vitality of earthworms in terms of weight and relative growth rate, so worms weights and relative growth rate decreased with increasing concentration and time period in all fertilizers used in the study, so the highest significant decrease in weight was 0.257 g and relative growth 34.40% at a concentration of 1500 mg / kg in the NPK balanced fertilizer treatment, while the highest decrease in weight was 0.474 g and the relative growth rate was 63.36% at a concentration of 1000 mg / kg in the urea treatment, while the triple phosphate fertilizer treatment recorded the highest significant decrease in weight 0.273 g and a growth rate A relative of 38.28% at a concentration of 1600 mg/kg and the highest decrease in weight was 0.225 g and a relative growth rate of 31.86% at a concentration of 240 mg/kg in the NPK balanced nanofertilizer treatment.
The Viva committee was chaired by Asst. Prof. Dr. Suhaira Walid Abdullah/Salah Al-din University Erbil/College of Basic Education and the membership of Asst. Prof. Dr. Firas Muhammad Bashir Abdul Karim/ University of Mosul/ College of Education for Girls, Lecturer Dr. Safaa Muhammad Mahmoud \ University of Mosul / College of Education for Pure Science and under the supervision and membership of Prof. Dr. Adnan Musa Muhammad / University of Mosul / College of Education for Pure Science.