Study of some Crop and Technological Characteristics of Some Wheat Cultivars Under Different Levels of Nitrogen Fertilization and Their Affected By Rust Diseases

For a two -years field experiment field was carried out at El-Gemmeiza Agric. Res. Stat., A.R.C., El- Gharbeia Governorate, Egypt  during 2018/19 and 2019/ 20 seasons ,to study the effect of two nitrogen levels (50 and75 kg N/fed.) on yield , yield components and quality traits of thirty eight wheat cultivars ( Triticum aestivum L.). The experimental design was a split- plot design with four replications .The main plot treatments were occupied by the two nitrogen fertilizer, while the wheat cultivars were assigned in the sub- plots.The results revealed that nitrogen fertilizer level had a significant effect on all studied traits in both seasons. Applied nitrogen level of 75 kg N/fed. increased days to heading, days to maturity, plant height, number of grains/spike, number of spikes/m2, 1000-grain weight, grain yield , germination %, relative density and dry matter % , However, EC ( µmhos/g) values were decreased with the same nitrogen rate in both seasons.Misr 2 cultivar recorded the highest days to heading, days to maturity, plant height. Although, Misr 3 cultivar ranked the highest number of spikes per m2, grain yields per feddan, germination %, relative density as well as dry matter % in both seasons.This work recommends growing Misr 3 cultivar using 75 kg N/fed.for achieving high yield and its components of wheat with good quality of seed and high resistant against rust diseases under Gemmeiza zone condition.