Effect of some Nitrogen Fertilization Rates on the Yield and Its Components for some New Egyptian Bread Wheat Cultivars

Document Type : Original research paper

Authors

1 Wheat Research Section - Field Crops Research Institute - A.R.C

2 Agronomy Dept., Fac., of Agric., Tanta University, Egypt.

3 Agronomy, Faculty of Agriculture, Tanta University, Egypt

Abstract

To examine the effect of nitrogen fertilization rates 40, 60 and 80 kg N/fed on growth and yield of the four bread wheat cultivars namely Giza 171, Sids 14, Sakha 95 and Misr 3 a field experiment was carried out at the experimental farm of Etai El-Baroud, Agricultural Research Station (ARC), El-Beheira Gov-ernorate, Egypt, during the two successive wheat growing seasons 2021/2022 and 2022/2023. Split plot design with four replicates was used, the main plots were assigned by three levels nitrogen. The subplots were assigned by four wheat cultivars. The obtained results revealed that, all tested cultivars differ in their response to nitrogen rates. Sakha 95 that fertilized with 40 kg N/fed recorded the lowest number of days to heading in the first season and maturity in both seasons, while Giza 171 that fertilized with 40 kg N/fed recorded the lowest number of days to heading in the second season. Giza 171 that fertilized with 80 kg N/fed had the highest values of plant height, spike length, number of grains/spike, 1000-kernel weight, grain yield/plot and biological yield/plot in both seasons. Sakha 95 that fertilized with 80 kg N/fed recorded the highest straw yield/plot in both seasons as well as number of spikes/m2.Sakha 95 that fertilized with 60 kg N/fed recorded the highest harvest index without any significant difference with Misr 3 under 80 kg N/fed in the first season. Sids 14 that fertilized with 80 kg N/fed had the highest number of spikes/m2 in the second season. Sids 14 under 40 kg N/fed had the highest harvest index in the second season. It could be recommended to fertilize the wheat cultivar Giza 171 with 80 kg N/fed to maximize both of grains and straw yield under west Delta conditions.

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