Effects of plant population and densities on yield and agricultural practises of three maize (Zea mays L.) cultivars under kahramanmaras conditiont

ABSTRACTPhD THESISEFFECTS OF PLANT POPULATION AND DENSITIES ON YIELD ANDAGRICULTURAL PRACTISES 0F THREE MA ZE (Zea mays L.)CULTIVARS UNDER KAHRAMANMARAS CONDITIONMerve SIRIKCIDEPARTMENT OF FIELD CROPSINSTITUTE OF NATURAL AND APPLIED SCIENCESUNIVERSITY OF CUKUROVASupervisor : Prof. Dr. Yusuf KIRTOKYear : 2006, Page:116Jury : Prof. Dr. Yusuf KIRTOK: Prof. Dr. Ahmet Can ÜLGER: Prof. Dr. Mustafa ÇÖLKESEN: Prof. Dr. Sadrettin KARAALTIN: Prof. Dr. Turan SA LAMT MURThis research was performed in order to determine the effects of various plantdensities of three maize hybrids (Borja, Girona, Donana) with five different spaces(70x10, 70x14, 70x18, 70x22, 70x26 cm) were used to determine the yield and yieldcomponents in the second crop growing season of 2004-2005 years at ExperimentStation of Kahramanmaras plain. Experiment was designed in a split split plot designwith three replications.According to the results, the tasseling period were decreased and indirectlyaffected on pollenation by increasing of row spaces at 70x26 cm.The plant height, the first ear height, decreased by the increasing of plantdensities. The stem diameter, ear length, ear diameter, kernel number per ear, earweight, kernel weight on ear, ear number of rows kernel, 1000 kernel weightincreased by increasing the plant densities.It was determined that plant density of 70x18 cm for cultivar Donana was theheighest 1187kg/da in our investigation.Key Words: Maize, plant spaces and plant population, hybrids, Yield and YieldComponentsII