Agro-physiological responses of tropical maize cultivars to nitrogen fertilization in the moist savanna of West Africa

2001 ◽  
pp. 804-805 ◽  
Author(s):  
S. O. Oikeh ◽  
W. J. Horst
Keyword(s):  
West Africa ◽  
Nitrogen Fertilization ◽  
Physiological Responses ◽  
Tropical Maize ◽  
Moist Savanna ◽  
Maize Cultivars

scholarly journals High Nitrogen Fertilization Modulates Morpho-Physiological Responses, Yield, and Water Productivity of Lowland Rice under Deficit Irrigation

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1291
Author(s):  
Nasr M. Abdou ◽  
Mohamed A. Abdel-Razek ◽  
Shimaa A. Abd El-Mageed ◽  
Wael M. Semida ◽  
Ahmed A. A. Leilah ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Irrigation Water ◽  
Nitrogen Fertilization ◽  
Deficit Irrigation ◽  
Physiological Responses ◽  
Water Productivity ◽  
Water Shortage ◽  
Rice Production ◽  
Lowland Rice ◽  
Nitrogen Fertilizers

Sustainability of rice production under flooding conditions has been challenged by water shortage and food demand. Applying higher nitrogen fertilization could be a practical solution to alleviate the deleterious effects of water stress on lowland rice (Oryza sativa L.) in semi-arid conditions. For this purpose, field experiments were conducted during the summer of 2017 and 2018 seasons. These trials were conducted as split-split based on randomized complete blocks design with soil moisture regimes at three levels (120, 100 and 80% of crop evapotranspiration (ETc), nitrogen fertilizers at two levels (N1—165 and N2—200 kg N ha−1) and three lowland Egyptian rice varieties [V1 (Giza178), V2 (Giza177) and V3 (Sakha104)] using three replications. For all varieties, growth (plant height, tillers No, effective tillers no), water status ((relative water content RWC, and membrane stability index, MSI), physiological responses (chlorophyll fluorescence, Relative chlorophyll content (SPAD), and yield were significantly increased with higher addition of nitrogen fertilizer under all water regimes. Variety V1 produced the highest grain yield compared to other varieties and the increases were 38% and 15% compared with V2 and V3, respectively. Increasing nitrogen up to 200 kg N ha−1 (N2) resulted in an increase in grain and straw yields by 12.7 and 18.2%, respectively, compared with N1. The highest irrigation water productivity (IWP) was recorded under I2 (0.89 kg m−3) compared to (0.83 kg m−3) and (0.82 kg m−3) for I1 and I3, respectively. Therefore, the new applied agro-management practice (deficit irrigation and higher nitrogen fertilizer) effectively saved irrigation water input by 50–60% when compared with the traditional cultivation method (flooding system). Hence, the new proposed innovative method for rice cultivation could be a promising strategy for enhancing the sustainability of rice production under water shortage conditions.

Potential of Lablab purpureus accessions for crop-livestock production in the West African savanna

2006 ◽  
Vol 145 (3) ◽  
pp. 229-238 ◽  
Author(s):  
S. U. EWANSIHA ◽  
U. F. CHIEZEY ◽  
S. A. TARAWALI ◽  
E. N. O. IWUAFOR
Keyword(s):  
West Africa ◽  
Crude Protein ◽  
Livestock Production ◽  
Forage Yield ◽  
Grain Production ◽  
Multiple Use ◽  
Lablab Purpureus ◽  
Forage Production ◽  
Moist Savanna ◽  
Savanna Zone

The introduction and use of herbaceous legumes may contribute to agricultural intensification, especially in the context of sustainable crop and livestock production systems. In the context of evaluating different legume species for these systems in moist savanna zone of West Africa, the present study involved the evaluation of 46 accessions of Lablab purpureus (L.) Sweet between 2000 and 2002 at Samaru, Zaria in the northern Guinea savanna of Nigeria to identify accessions with the potential to contribute to grain or forage production and those with the potential for multiple use. Grain yields (0·6–2·4 t/ha) with a mean seed crude protein and phosphorus content of 25·3 and 0·46 g/kg, respectively, were obtained. Dry matter yields (leaf: 0·3–3·1, stem: 0·2–4·6, root: 0·03–0·3 t/ha) were produced between 40 and 140 days after planting. Within this same period up to 1152 kg shoot crude protein/ha, equivalent to 184 kg N/ha, were recorded for accessions. Ten accessions that may contribute to grain production, eight accessions that may contribute to forage production and six accessions with drought tolerance were identified. Some white-seeded accessions (Grif 1246, ILRI 4612 and PI 183451) with good grain and forage yield and high-protein content have the potential to provide more and higher quality food for people and feed for livestock. The observed potential to contribute to grain production for protein-rich food, feed for livestock and green manure for soil N improvement suggests lablab may be an acceptable legume option for use in cereal-legume-livestock systems in the moist savanna zone of West Africa.

Differential N uptake by maize cultivars and soil nitrate dynamics under N fertilization in West Africa

2003 ◽  
Vol 100 (2-3) ◽  
pp. 181-191 ◽  
Author(s):  
S.O Oikeh ◽  
R.J Carsky ◽  
J.G Kling ◽  
V.O Chude ◽  
W.J Horst
Keyword(s):  
West Africa ◽  
N Uptake ◽  
N Fertilization ◽  
Soil Nitrate ◽  
Maize Cultivars

Comparative Performance of Early-maturing Maize Cultivars Developed in Three Eras under Drought Stress and Well-watered Environments in West Africa

Crop Science ◽  
2013 ◽  
Vol 53 (4) ◽  
pp. 1298-1311 ◽  
Author(s):  
B. Badu-Apraku ◽  
M. Oyekunle ◽  
A. Menkir ◽  
K. Obeng-Antwi ◽  
C. G. Yallou ◽  
...  
Keyword(s):  
Drought Stress ◽  
West Africa ◽  
Comparative Performance ◽  
Maize Cultivars ◽  
Early Maturing

Temperature responses of tropical maize cultivars selected for broad adaptation

1997 ◽  
Vol 49 (2-3) ◽  
pp. 215-229 ◽  
Author(s):  
H.R. Lafitte ◽  
G.O. Edmeades ◽  
E.C. Johnson
Keyword(s):  
Tropical Maize ◽  
Maize Cultivars ◽  
Temperature Responses

scholarly journals Physiological responses of three maize cultivars to drought stress and recovery

2009 ◽  
Vol 75 (1) ◽  
pp. 34-42 ◽  
Author(s):  
B. Efeoğlu ◽  
Y. Ekmekçi ◽  
N. Çiçek
Keyword(s):  
Drought Stress ◽  
Physiological Responses ◽  
Maize Cultivars

Maturity Class and P Effects on Soya Bean Grain Yield in the Moist Savanna of West Africa

2003 ◽  
Vol 189 (6) ◽  
pp. 422-427 ◽  
Author(s):  
I. J. Ogoke ◽  
R. J. Carsky ◽  
A. O. Togun ◽  
K. E. Dashiell
Keyword(s):  
West Africa ◽  
Grain Yield ◽  
Soya Bean ◽  
Moist Savanna ◽  
Maturity Class

scholarly journals Analysis of the yield of two groups of tropical maize cultivars. Varietal characteristics, yield potentials, optimum densities

Agronomie ◽  
1999 ◽  
Vol 19 (5) ◽  
pp. 379-394 ◽  
Author(s):  
Pierre Siband ◽  
Joseph Wey ◽  
Robert Oliver ◽  
Philippe Letourmy ◽  
Hubert Manichon
Keyword(s):  
Tropical Maize ◽  
Maize Cultivars
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