Osman E.A.M., Kh. M. Abd El- Latif, A.H. Serag and Amira M. Hassen( 2021). Effect of Irrigation Levels and Sulfur Rates on Maize Productivity in North Sinai, EgyptAmerican-Eurasian J. Agric. & Environ. Sci., 21 (3): 168-177, 2021 ISSN 1818-6769
Abstract: A field experiment was conducted during 2018 and 2019 growing seasons at Al-Arish Agric. Res. Station (33.82 E, 31.12 N and 4.10 m altitude above mean sea level), North Sinai Governorate, Egypt. The trial aimed to investigate the effect of three irrigation water levels (I1: 120%, I2: 100% and I3: 80% ETc) and three sulfur rates (0, 200 and 400 kg fed 1) on maize yield, yield components and some crop-water relations.
A split-plot design with three replicates was adopted. The results revealed that, most of the studied maize parameters (ear weight per plant (g), 100-grain weight (g), stalk and grain yields (t fed 1), N, P and K contents, chlorophyll, total carbohydrate and protein (%)) were significantly affected by the adopted irrigation water levels in 2018 and 2019 seasons. Increasing irrigation water level from 80% to 100% or 120% ETc resulted in
gradual increase in the abovementioned parameters. The adopted sulfur rates applications exerted significant effects on all investigated maize parameters and chemical constituents as well. The highest sulfur rate (400 kg fed 1) exhibited the highest figures of the abovementioned characters compared with the other two rates
in 2018 and 2019 seasons. The interaction of the highest irrigation water level (120% ETc) and applying sulfur at 400 kg fed 1 resulted in the highest significant values of the investigated maize yield, yield components and chemical constituents in 2018 and 2019 seasons. Average values of applied irrigation water (AIW) and water productivity (WP) under I1, I2 and I3 treatments were 3517, 2537 and 2552 m fed . Average WP values were 3 1 0.90, 0.82 and 0.80 kg/m 3 for the same respective treatments. It is recommended to apply 120% ETc and 400 kg fed 1 sulfur to obtain highest maize grain yield under Al-Arish conditions.
Keywords: (Maize yield Irrigation water level Sulphur rate Yield yield components Water productivity)
