Fertilization Strategies Based on Climate Information to Enhance Food Security Through Improved Dryland Cereals Production

Ganyo, K K and Muller, B and Guissé, A and Adam, M (2018) Fertilization Strategies Based on Climate Information to Enhance Food Security Through Improved Dryland Cereals Production. In: Handbook of Climate Change Resilience. Springer, pp. 1-18. ISBN 978-3-319-71025-9

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Abstract

Rainfall uncertainty and nutrient deficiency affect sorghum production in Sahel. This study aimed at (i) determining the responses (varieties*water*nitrogen) of various West-African sorghum (Sorghum bicolor L. Moench) varieties to the application of fertilizer (NPK and urea) at selected growing stages according to water regime (irrigated or not, different rainfall patterns) and (ii) simulating them to define alternative fertilization strategies. This chapter proposes alternative fertilization strategies in line with rainfall patterns. Split plot experiments with four replications were carried out in two locations (Senegal), with four improved sorghum varieties (Fadda, IS15401, Soumba and 621B). Treatments were T1, no fertilizer; T2 = 150 kg/ha of NPK (15-15-15) at emergence +50 kg/ha of urea (46%) at tillering +50 Kg/ha of urea at stem extension; T3 = half rate of T2 applied at the same stages; T4 = 150 kg/ha of NPK + 50 kg/ha of urea at stem extension +50 kg/ha of urea at heading, and T5 = half rate of T4 applied at the same stages. Plant height, leaf number, grain yield, and biomass were significantly affected by the timing and rate of fertilizers. Grain yield were affected by water*nitrogen and nitrogen*variety interactions. It varied from 2111 to 261 kg/ha at “Nioro du Rip” and from 1670 to 267 kg/ha at “Sinthiou Malème”. CERES-Sorghum model overestimated late fertilizer grain yields. To achieve acceptable grain yield, fertilizers application should be managed regarding weather.

Item Type: Book Section
Divisions: Research Program : West & Central Africa
CRP: UNSPECIFIED
Uncontrolled Keywords: Fertilization strategies, Climate information, Food security, Sorghum, Sahel, Modeling, CERES-Sorghum model, Sorghum production, Africa
Subjects: Others > Climate Mitigation
Others > Cereals
Mandate crops > Sorghum
Others > Drylands Agriculture
Others > Fertilizer Applications
Others > Climate Change
Others > Food Security
Others > African Agriculture
Depositing User: Mr Ramesh K
Date Deposited: 03 Oct 2018 11:09
Last Modified: 04 Oct 2018 05:20
URI: http://oar.icrisat.org/id/eprint/10886
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