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Efficient Use of N and Water for Maize (Zea Mays L.) Crop under Drip Irrigation System using 15N Stable Isotope.

The 4th International Conference on Biotechnology Applications in Agriculture (ICBAA), Benha University, Moshtohor and Hurghada, Egypt, 4-7 April 2018 • 2018
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Authors M.A. Hekal; A.A. Abdel-Salam; S.M. Soliman; Y.G.M. Galal; M. Abdel-Moniem; W.R. Zahra; A.A. Moursy
Keywords NUE, WUE, recovery of fertilizer N in maize, 15N-Isotope dilution.
Journal The 4th International Conference on Biotechnology Applications in Agriculture (ICBAA), Benha University, Moshtohor and Hurghada, Egypt, 4-7 April 2018
Publisher Faculty of Agriculture, Benha University
Volume Not Available
Issue Not Available
Pages 615-622
publication.type International
Paper Link Not Available
Supplementary Materials Not Available
Abstract
A field experiment was carried out on Maize (Zea Mays L.) grown on a sand soil during 2017 season to assess implications of N rates and irrigation water on yield and water consumption. The design was a factorial randomized complete block involving two factors: Factor W: 3 irrigation treatments as % of an Etc of 6588 m3 ha-1, i.e. 100% (W1), 80% (W2) and 70% (W3). Factor N: 3 N rates as % of a recommended 310 kg N ha-1,i.e.100% (N1) ,80% (N2) and 70% (N3). Grain yields (Mg ha-1) ranged from 2.80 (W1N3) to 4.48 (W2N2). Fertilizer N recovered in grains+stalks+leaves ranged from 5.4 % (W2N1) to 16.5% (W2N3). N use efficiency (kg grains kg-1 N) was 6.3 (W1N2) up to 18.6(W3N1). Water utilization efficiency (kg grains m-3 water) was 0.43 (W1 N3) to 0.84(W3 N3). High N and water use efficiency on sandy soils, must be by balanced combination water and N , and the general trend showed 5270 m3 water and 248 kg N per hectare (representing 80% of officially recommended inputs of each)