Response of some Local Wheat Varieties (Triticum aestivum L.) To Seeding Rate and Nitrogen Fertilizer

Abstract

Study were conducted in Yemeni genetic resources Center -Sana'a University, in 2013 to 2014 to determine the optimum combination of seeding rate and N management effects on growth and yield of some varieties of wheat (Triticum aestivum L.). Treatments consisted of: seeding rates (100 kg\ha, 130 kg/ha, 160 kg/ha and 200 kg/ha), A factorial combination of two genotypes (V1,Wasni and V2, Bony) and N levels (150 and 200 kg ha–1 ). Experiments were arranged in a split design with three replications with Randomized Complete Block Design. (R.C.B.D.), and the results could be summarized as follows: - The seeding rate of 160 kg/ha caused significantly increase in plant hight, No. of spikes, grain yield, biological yield and percentage of protein , whereas all characteristics in this study were decrease by using high seeding rate of 200 kg/ha. - Plant high and grain yield increased significantly by using 150 kg N/ha. In the other hand percentage of protein decrease with using 200 kg N/ha. - The biological yield wasn't significantly affected by N levels, seeding rate and varieties, in the first season, with the second year plant high wasn't affected by N fertilizer. -Biological yield wasn't significantly affected by seeding rate, N fertilizer in first season or sowing of variety in both seasons. In the other hand plant high wasn't affected by N in the second season. -The variety(Wasni) was significantly surpassed in plant high, whereas Bony variety was significantly surpassed in grain yield, and both varieties weren't difference in number of spikes and percentage of grain protein in both growing seasons, while no significantly difference among varieties in biological yield in both seasons.