Effect of Planting Dates and Nitrogen Fertilization Levels on Quality and Chemical Properties of Some Hybrids Yellow Maze (Zea Mays L.)

Abstract

   The field trial was contacted at an extention field at Shiba-Elnakaria, Rejon, Zagazig (Sharkia Governorate), during two seasons of 2023 and 2024 to study the effect of planting dates (1^st May, 15^th May and 30^th May), nitrogen levels zero (70, 100 and 130 kg N/fed) on quality and chemical of some yellow maize hybrids (176, 168 and payoneer 444).

   The results showed that planting dates caused a significantly different in studied characters, i.e. germination percentage, good seedling%, poor seedling%, abnormal seedling %, root length (cm), shoot length (cm), carotene % and oil percentage. Since, May 1^st date appeared higher than any other plantin dates in most studied characters.

   Also, the results indicated that the tested yellow maize hybrids differed significantly in studied characters, i.e. viability, vigour and chemical, i.e. germination %, good seedling %, fair seedling %, poor seedling %, abnormal seedling %, root length, shoot length, protein %, carotene % and oil percentage for payoneer 444.

   Increasing nitrogen levels from zero, 70, 100 and 130 kg N/fed. significantly increased the studied characters. Generally 130 kg N/fed. gave the highest values, followed by 100, 70 and zero kg N/fed. were gradually lowest in this concern, respectively.

   Conclusively, all studied characters 1^st May surpassed that 15^th May and 30^th May, when 130 kg/fed. gave the highest viability, vigour and chemical characters. Payoneer 444  gave the highest values in germination %, good seedling %, root length (cm), shoot length (cm), protein %, carotene % and oil %.