Response of Wheat Productivity to Irrigation Regimes and Nitrogen Fertilization Levels

Abstract

Wheat is the main cereal crop in Egypt. The gap between production and consumption is about 60%. Research efforts are needed to reduce this gap, therefore; the objective of this work was to study the effect of three water regimes as irrigation at 45%, 60% and 70% depletion of the available soil moisture, and three nitrogen fertilization levels on two wheat varieties (Giza 168 and Giza 171).The field experiments were carried out at Bahry El-Methaq region, Alexandria Governorate, Egypt during the two successive winter seasons of 2015/2016 and 2016/2017. The experimental design of the study followed split split plot design (SSPD) with three replicates, keeping two bread wheat cultivars {Giza 168 and Giza 171 } as the main plots, irrigation regimes (irrigation at 45%, 60% and 70% depletion of the available soil moisture) as subplot, and the three fertilization levels as 100%, 80% and 60% from recommended fertilizer rates of nitrogen fertilization common applied as sub-subplot. The results showed that seasonal ET0 was 665.9 mm for the first season and 624.8 for the second season.

Effect of seed rate and irrigation interval on yield components and yield of bread wheat (Triticum aestivum L.) at Mekane Selam district, South Wollo, Ethiopia

“…Gafaar (2007) [10] reported the highest value of biological yield with increasing seed rate up to 400 grains m -2 in wheat crop. However, the current result was in contrast with results reported by Allam (2003) [2] where in wheat higher seed rates, higher number of plants and tillers failed to produce higher biomass yield. With regards to the irrigation interval, the result is in line with the findings of Aslam et al (2014) [3] who reported that wheat crop irrigated five times resulted in significantly maximum biological yield (13732 kg ha -1 ) while the minimum biological yield (8600 kg ha -1 ) was recorded in three irrigations.…”