Response of some bread wheat cultivars to nitrogen fertilizer levels in newly reclaimed sandy soils

Document Type : Original Article

Authors

1 Wheat Research Department, Field Crops Research Institute, Agriculture Research Center, Egypt.

2 Wheat Research Department, Field Crops Research Institute, Agricultural Research Center, Egypt.

Abstract

The present study was carried out (sandy soil under sprinkler irrigation) in two locations, Mallawy and Assiut, Agricultural Research Stations, Egypt, in two successive winter growing seasons of 2019/2020 and 2020/2021 to evaluate four bread wheat cultivars under four nitrogen levels for grain yield and its components and to identify response and suitable across 16 environments (combination of four soil N levels × two years x two locations) at newly reclaimed sandy soils. A split-plot arrangement with four replicates in each season. The combined analysis of variance showed significant differences among environments, cultivars, and nitrogen levels for all studied characters. Misr 1 had the earliest heading and maturity, and the shortest plants. Shandaweel 1 was superior overall genotypes for plant height, No. of grains spike-1, 1000-grain weight, grain yield, and biological yield followed by Misr 2.
Furthermore, the nitrogen level of 125kg N fed-1 (N4) was the best fertilizer level followed by the nitrogen level of 100kg N fed-1 (N3) in sandy soil for recorded the highest values for yield and its components under two locations. The interaction (C x N) was significant for most studied traits under four environments. Cultivar Misr 2 followed by Shandaweel 1 were recorded with the highest values for No. of spikes m-2, No. of grains spike-1, 1000-grain weight, grain yield, and biological yield with level 125 kg N fed-1 (N4) under Mallawy and Assiut locations. According to GGE-biplot, Shandaweel 1 (G1) was the most stable cultivar.

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